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Giessen , spelled Gießen in German ( German pronunciation: [ˈɡiːsn̩] ), is a town in the German state ( Bundesland ) of Hesse , capital of both the district of Giessen and the administrative region of Giessen . The population is approximately 90,000, with roughly 37,000 university students.

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100-608: The name comes from Giezzen , as it was first referred to in 1197, which refers to the position of the town between several rivers, lakes and streams. The largest river in Giessen is the Lahn , which divides the town in two parts (west and east), roughly 50 kilometres (31 miles) north of Frankfurt am Main . Giessen is also home to the University of Giessen . In 1969, the town hosted the ninth Hessentag state festival. Giessen came into being as

200-617: A Germanic settlement in the location, dated to around the 1st century, situated above a bend of the Lahn. In the Roman Era, the Lahn presumably was used by the Romans to supply their fort at Bad Ems, Kastell Ems. Here the Limes Germanicus on the borders of Germania Superior and Rhaetia crossed the Lahn. Archaeological finds are known from Niederlahnstein, as well as from Lahnau. One Lahnau site,

300-521: A central flood warning system and coordination of flood control efforts through the regional council of Giessen. The Lahn, from a point between Lahnau and Dutenhofen (Wetzlar) to its confluence the Rhine, is designated as a federal waterway. In this area, it is subject to the Water and Shipping Administration of the federal government, with the responsible office being that at Koblenz. The middle and lower section of

400-413: A domestication that served goals such as reducing stagnant bogs that fostered waterborne diseases, making regions more habitable for human settlement, and reduce high frequency of floods. Not long before Tulla went to work on widening and straightening the river, heavy floods caused significant loss of life. Four diplomatic treaties were signed among German state governments and French regions dealing with

500-493: A minimum water depth of 1.60 m in the navigation channel. There are stream gauges at Kalkofen (of Dörnberg ) (normal water level 1.80 m) and at Leun . Above Dehrn there are manual locks and frequent shoals, making the passage of boats difficult. Two weirs in Wetzlar are an obstruction to shipping further upriver. Since the late 1980s, there have been increasing attempts to promote the Lahn for ecotourism and to coordinate and expand

600-528: A moated castle in 1152 built by Count Wilhelm von Gleiberg , although the history of the community in the northeast and in today's suburb called "Wieseck" dates back to 775. The town became part of Hesse-Marburg in 1567, passing to Hesse-Darmstadt in 1604. The University of Giessen was founded in 1607. Giessen was included within the Grand Duchy of Hesse created in 1806 during the Napoleonic Wars . After

700-656: A predominantly westerly direction and flows into the Netherlands where it eventually empties into the North Sea . It drains an area of 9,973 km . Its name derives from the Celtic Rēnos . There are two German states named after the river, North Rhine-Westphalia and Rhineland-Palatinate , in addition to several districts (e.g. Rhein-Sieg ). The departments of Bas-Rhin and Haut-Rhin in Alsace (France) are also named after

800-666: A small section north of the dam in Gießen. The Lahn is a 245.6-kilometer (152.6 mi)-long, right (or eastern) tributary of the Rhine in Germany. Its course passes through the federal states of North Rhine-Westphalia (23.0 km), Hesse (165.6 km), and Rhineland-Palatinate (57.0 km). The Lahn originates at the Lahnhof, a locality of Nenkersdorf, which is a constituent community of Netphen in southeastern North Rhine-Westphalia, near

900-594: A waterway from France to North Sea via the states of the Confederation of the Rhine . Upstream of Limburg, however, the work was slow, partly because the population pressed into emergency service only reluctantly cooperated. Large parts of the shore were only secured with fascines , which rotted shortly thereafter. In 1816 the Duchy of Nassau and the Kingdom of Prussia agreed to expand the Lahn as far as Giessen, where it joined

1000-571: A waterway in the Holy Roman Empire . Among the largest and most important cities on the Rhine are Cologne , Rotterdam , Düsseldorf , Duisburg , Strasbourg , Arnhem , and Basel . The variants of the name of the Rhine (Latin Rhenus; French Rhin, Italian Reno, Romansh Rain or Rein, Dutch Rijn, Alemannic Ry, Ripuarian Rhing) in modern languages are all derived from the Gaulish name Rēnos , which

1100-722: Is a Central German development of the early modern period , with the Alemannic name R(n) keeping the older vocalism. In Alemannic, the deletion of the ending -n in pausa is a recent development; the form Rn is largely preserved in Lucernese dialects. Rhing in Ripuarian is diphthongized, as is Rhei, Rhoi in Palatine . While Spanish has adopted the Germanic vocalism Rin- , Italian, Occitan, and Portuguese have retained

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1200-455: Is a dialect of rotwelsch spoken in and around Giessen by people in lower income neighbourhoods, some of which are known as "Eulenkopf", "Gummiinsel", "Heyerweg" and "Margaretenhütte". Approximately 700–750 residents spoke the dialect fluently as of 1976. Although the dialect still influences the Giessen vernacular , it is nearly extinct in terms of fluent speakers. Climate in this area has mild differences between highs and lows, and there

1300-449: Is adequate rainfall year-round. The Köppen Climate Classification subtype for this climate is " Cfb ". (Marine West Coast Climate). Lahn The Lahn is a 245.6-kilometre-long (152.6 mi), right (or eastern) tributary of the Rhine in Germany. Its course passes through the federal states of North Rhine-Westphalia (23.0 km), Hesse (165.6 km), and Rhineland-Palatinate (57.0 km). It has its source in

1400-608: Is located southwest of the 624 m (2,047 ft) high Lahnkopf. In the vicinity are also the origins of the Eder (5.5 km northwest of the Lahnhof) and the Sieg (another 3 km north). Whereas the Sieg takes the shortest route to the Rhine (to the west), the Lahn first runs in the opposite direction, paralleling the Eder for many kilometers. The Lahn first flows in a northeasterly direction through

1500-696: Is one of the major European rivers . The river begins in the Swiss canton of Graubünden in the southeastern Swiss Alps . It forms the Swiss-Liechtenstein border and partly the Swiss-Austrian and Swiss-German borders. After that the Rhine defines much of the Franco-German border , after which it flows in a mostly northerly direction through the German Rhineland . Finally in Germany, the Rhine turns into

1600-582: Is significantly shortened from its natural course due to a number of canal projects completed in the 19th and 20th century. The "total length of the Rhine", to the inclusion of Lake Constance and the Alpine Rhine is more difficult to measure objectively; it was cited as 1,232 kilometers (766 miles) by the Dutch Rijkswaterstaat in 2010. Its course is conventionally divided as follows: The Rhine carries its name without distinctive accessories only from

1700-750: Is sometimes called Rhinesee ("Lake Rhine"). Besides the Seerhein , the Radolfzeller Aach is the main tributary of Untersee . It adds large amounts of water from the Danube system to the Untersee via the Danube Sinkhole . Reichenau Island was formed at the same time as the Seerhein, when the water level fell to its current level. Lake Untersee is part of the border between Switzerland and Germany , with Germany on

1800-628: Is the second-longest river in Central and Western Europe (after the Danube ), at about 1,230 km (760 mi), with an average discharge of about 2,900 m /s (100,000 cu ft/s). The Rhine and the Danube comprised much of the Roman Empire 's northern inland boundary , and the Rhine has been a vital navigable waterway bringing trade and goods deep inland since those days. The various castles and defenses built along it attest to its prominence as

1900-650: Is the Lahnhöhenwege along both sides of the Lahn from Wetzlar to Oberlahnstein. The first partial section of a pilgrimage route, the Lahn-Camino on the left side of the Lahn, leads from Wetzlar Cathedral to Lahnstein via Castle Lahneck and the Hospital Chapel. There are 19 hydroelectric plants using the Lahn to generate electricity. Wine is produced in Obernhof and Weinähr. The wines of the Lahn region are marketed under

2000-518: The Aare . The Aare more than doubles the Rhine's water discharge, to an average of slightly more than 1,000 m /s (35,000 cu ft/s), and provides more than a fifth of the discharge at the Dutch border. The Aare also contains the waters from the 4,274 m (14,022 ft) summit of Finsteraarhorn , the highest point of the Rhine basin . Between Eglisau and Basel , the vast majority of its length,

2100-639: The Anterior Rhine and the Posterior Rhine join and form the Alpine Rhine. The river makes a distinctive turn to the north near Chur . This section is nearly 86 km long, and descends from a height of 599 meters to 396 meters. It flows through a wide glacial Alpine valley known as the Rhine Valley ( German : Rheintal ). Near Sargan a natural dam, only a few meters high, prevents it from flowing into

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2200-889: The Dautphe (which flows in a side valley to the south). Shortly after the village of Caldern (of Lahn Valley), the ridgeline of the Rothaargebirge on the north ends with the Wollenberg and that of the Gladenbach Bergland with the Hungert. The Lahn leaves the Rhenish Slate Mountains for a long section and reaches the West Hesse Highlands , where it flows through the extreme south of the Wetschaft Depression , north of

2300-668: The First World War , it was part of the People's State of Hesse . During the Second World War , a subcamp of the Buchenwald concentration camp was in the Heil- und Pflegeanstalt Licher Straße . Heavy bombing destroyed about 75 percent of Giessen in 1944, including most of the town's historic buildings. It became part of the modern state of Hesse after the war. In 1977, Giessen was merged with

2400-666: The Gladenbach Bergland , while downstream they originate in the (High) Westerwald. Much of the Westerwald, in contrast, has no significant watershed, so the streams are almost random in finding their direction. Because the highest point of the Westerwald is near the Sieg , and especially because the Taunus is very close to the Main , both Mittelgebirge are each considerably more than half drained by

2500-596: The Grand Duchy of Hesse . Little is known about the work that followed, but in the 1825 boatmen on the Lahn who shipped mineral water from springs in Selters and Fachingen addressed a letter of appreciation to the Nassau government in Wiesbaden for the rehabilitation of river systems. Overall, however, there seems to have been only repairs and temporary works accomplished through the 1830s. The earliest attempts to count ship traffic on

2600-1031: The Limburg Cathedral crowns such an outcropping. At Limburg, the river again enters a wider valley. Below Diez , the Lahn absorbs the Aar from the south. At Fachingen in the municipality of Birlenbach , it leaves the Limburger Basin and enters the Lower Lahntal. Its course is incised over 200 metres (660 ft) deep in the Slate Mountains. Near Obernhof , the Gelbach enters the Lahn opposite Arnstein Abbey . Then, after passing Nassau and Bad Ems , where, as in Fachingen, mineral springs (sources of Emser salt) can be found, it completes its 242 km (150 mi) run, entering

2700-732: The Neckar in Mannheim and the Main across from Mainz. In Mainz, the Rhine leaves the Upper Rhine Valley and flows through the Mainz Basin. The southern half of the Upper Rhine forms the border between France ( Alsace ) and Germany (Baden-Württemberg). The northern part forms the border between the German states of Rhineland-Palatinate in the west on the one hand, and Baden-Württemberg and Hesse on

2800-452: The Obersee with the 30 cm lower Untersee . Distance markers along the Rhine measure the distance from the bridge in the old city center of Konstanz. For most of its length, the Seerhein forms the border between Germany and Switzerland. The exception is the old city center of Konstanz, on the Swiss side of the river. The Seerhein emerged in the last thousands of years, when erosion caused

2900-626: The Rhine knee , a major bend, where the overall direction of the Rhine changes from west to north. Here the High Rhine ends. Legally, the Central Bridge is the boundary between High and Upper Rhine. The river now flows north as Upper Rhine through the Upper Rhine Plain , which is about 300 km long and up to 40 km wide. The most important tributaries in this area are the Ill below of Strasbourg,

3000-400: The Rhine knee , the river turns north and leaves Switzerland altogether. The High Rhine is characterized by numerous dams. On the few remaining natural sections, there are still several rapids . Over its entire course from Lake Constance to the Swiss border at Basel the river descends from 395 m to 252 m. In the center of Basel, the first major city in the course of the stream, is

3100-442: The Rothaargebirge , the highest part of the Sauerland . It meets the Rhine at Lahnstein , near Koblenz . Important cities along the Lahn include Marburg , Gießen , Wetzlar , Limburg an der Lahn , Weilburg and Bad Ems . Tributaries to the Lahn include the Ohm , Dill , the Weil and the Aar . The lower Lahn has many dams with locks , allowing regular shipping from its mouth up to Runkel . Riverboats also operate on

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3200-421: The Waldgirmes Forum in the community of Waldgirmes, was discovered in the 1990s and had been the site of a Roman town. Another site in the community of Dorlar has the remains of a Roman marching camp (or castra ). These Lahnau sites have significant altered the current understanding of the history of the Romans east of the Rhine and north of the Limes . During the Migration Period , the Alamanni settled in

3300-461: The Wieseck from the left, the Lahn's general direction of flow changes from the south to the west. The Gießen Basin extends a few more miles downstream to Atzbach, a suburb of Lahnau . From the 1960s until the 1980s, there was extensive gravel mining in this area. The area between Heuchelheim , Lahnau, and the Wetzlar borough of Dutenhofen was to be completely mined and a water sports center with an Olympic-suitable rowing course built. This plan

3400-467: The canton of Ticino is drained by the Reno di Medel , which crosses the geomorphologic Alpine main ridge from the south. All streams in the source area are partially, sometimes completely, captured and sent to storage reservoirs for the local hydro-electric power plants. The culminating point of the Anterior Rhine's drainage basin is the Piz Russein of the Tödi massif of the Glarus Alps at 3,613 meters (11,854 ft) above sea level. It starts with

3500-426: The confluence of the Rein Anteriur/Vorderrhein and Rein Posteriur/Hinterrhein next to Reichenau in Tamins . Above this point is the extensive catchment area of the headwaters of the Rhine. This area belongs almost exclusively to the Swiss canton of Grisons ( Graubünden ), ranging from Saint-Gotthard Massif in the west via one valley lying in the canton of Ticino and Sondrio ( Lombardy , Italy) in

3600-411: The 17th and early 18th centuries, there were several initiatives of adjacent princes to further expand the Lahn as a waterway, but they all failed due to lack of coordination. In 1740, the Archbishopric of Trier began construction to make the mouth of the Lahn passable for larger vessels. In winter of 1753/54, bank stabilization and creation of towpaths were done along the entire length of the river. Then

3700-412: The 19th century. While it was slightly modified during the Roman occupation, it was not until the emergence of engineers such as Johann Gottfried Tulla that significant modernization efforts changed the shape of the river. Earlier work under Frederick the Great surrounded efforts to ease shipping and construct dams to serve coal transportation. Tulla is considered to have domesticated the Upper Rhine,

3800-424: The Anterior Rhine and the Rhine as a whole. The Posterior Rhine rises in the Rheinwald below the Rheinwaldhorn . The source of the river is generally considered north of Lai da Tuma/Tomasee on Rein Anteriur/Vorderrhein , although its southern tributary Rein da Medel is actually longer before its confluence with the Anterior Rhine near Disentis . The Anterior Rhine arises from numerous source streams in

3900-401: The Austrian state of Vorarlberg , and the Swiss cantons of Thurgau and St. Gallen . The Rhine flows into it from the south following the Swiss-Austrian border. It is located at approximately 47°39′N 9°19′E  /  47.650°N 9.317°E  / 47.650; 9.317 . The flow of cold, grey mountain water continues for some distance into the lake. The cold water flows near

4000-412: The Chief Construction Inspector of Kirn to make the Lahn fully navigable. In the first winter, the section of the riverside from the mouth to Limburg was stabilized, particularly so that the course could be narrowed in shallow places. It was planned in the long run to make the Lahn navigable as far as Marburg and from there to construct a canal to Fulda to connect it with the Weser . This would create

4100-422: The Gleiberg, the Vetzberg, the Dünsberg, and the Schiffenberg. At Wetzlar, the Lahn is joined by its second longest tributary, the Dill , which has a length of 55.0 kilometres (34.2 mi). At this location, the valleys of the Lahn and Dill separate three parts of the Rhenish Slate Mountains from each other: the Gladenbach Bergland, the Westerwald to the northwest, and the Taunus to the south. After Wetzlar,

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4200-420: The High Rhine forms the border between Germany and Switzerland . Only for brief distances at its extremities does the river run entirely within Switzerland; at the eastern end it separates the bulk of the canton of Schaffhausen and the German exclave of Büsingen am Hochrhein on the northern bank from cantons of Zürich and Thurgau , while at the western end it bisects the canton of Basel-Stadt . Here, at

4300-442: The Lahn Valley is simply considered part of these mountains. Between Niederlaasphe (of Bad Laasphe) and Wallau (of Biedenkopf ), the river crosses the border between North Rhine-Westphalia and Hesse. It then flows in an easterly direction through some districts of Biedenkopf (but not the central town) and the towns of Dautphetal and Lahntal . It is joined from the right by the Perf at Wallau and at Friedensdorf (of Dautphetal) by

4400-399: The Lahn could travel fully loaded only from Gießen to Löhnberg. There, they had to lighten their load in order to reduce their draft and continue the journey. Also, this was only during two to three months. In a further four to five months per year, the load had to be reduced even earlier due to the low water level. The rest of the year the Lahn was not passable. From Wetzlar to Lahnstein, where

4500-399: The Lahn dated from 1827. At the lock at Runkel, 278 vessels were counted in that year, with the state government of Nassau explicitly pointing out that most of the river traffic travelled from the mouth to Limburg, or with smaller boats from the upper reaches to Weilburg, and only a small part passed Runkel. In 1833, however, 464 vessels were counted. The main reason for the increase is likely

4600-483: The Lahn from the right. The Ohm flows from the Vogelsberg and enters from the left. It is notable that not only is the Ohm at the point of its confluence with the Lahn only one kilometre shorter from its source than the Lahn itself, but the Ohm's catchment area of 984 square kilometres (380 sq mi) is significantly larger than that of the Lahn above the confluence, 652 square kilometres (252 sq mi), or only 452 square kilometres (175 sq mi) before

4700-500: The Lahn is navigable and has a large number of locks. The waterway is used almost exclusively by smaller motor yachts for tourists, as well as paddled- and rowboats . For non-motorized watercraft, the Lahn can be used for the entire length between Roth (of Weimar ) and the Rhine. From the mouth upwards to Dehrn (of Runkel ), Lahn-km 70 (above Limburg), the river is consistently passable for larger vessels, with locks operated by personnel. The Water and Shipping Administration guarantees

4800-403: The Lahn passable as far as Gießen for boats that were significantly larger than the existing vehicles on the river. In Prussian territory, the work was largely completed by 1847, including construction of locks in Dorlar, Wetzlar, Wetzlar-Blechwalze, Oberbiel and Niederbiel. In Nassau's territory, locks were built at Löhnberg, Villmar, and Balduinstein, as well as the greatest technical achievement:

4900-424: The Lahn reverses to the west again and enters the fertile Limburger Basin, where the river is incised to a depth of about 50 metres (160 ft). Here the river is joined by two tributaries, the Emsbach coming from the Taunus and the Elbbach from the Westerwald. In this area are frequent outcroppings of Devonian limestone , the so-called Lahn Marble (German: Lahnmarmor ), such as at Limburg an der Lahn , where

5000-551: The Lahn. Given the increasing ore mining in the Lahn Valley, officials from Nassau and Prussia in 1841 made an inspection trip along the river from Marburg to the Rhine. The Prussians were the driving force behind river expansion projects, seeking to establish a connection between Wetzlar and their Rhine Province and to secure the iron ore supply for the growing industry in the Ruhr Valley. Until 1844, Hesse-Darmstadt also joined expansion efforts, while Hesse-Kassel declined participation. The participating governments agreed to make

5100-569: The Lahn. Especially the left tributaries from the Taunus flow with a strong south-north orientation. The river Emsbach runs through the Idstein Basin, which divides the (Hinter-) Taunus into two parts, while the Aar is central for the (Western and Eastern) Aartaunus. A list of all the tributaries of the Lahn, including their position relative to the main river (l = left; r = right) and length in kilometers, are listed in downstream order as follows: Source to Marburg: Marburg to Wetzlar: Rhine The Rhine ( / r aɪ n / RYNE )

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5200-454: The Latin Ren- . The Gaulish name Rēnos ( Proto-Celtic or pre-Celtic *Reinos ) belongs to a class of river names built from the PIE root *rei- "to move, flow, run", also found in other names such as the Reno in Italy. The grammatical gender of the Celtic name (as well as of its Greek and Latin adaptation) is masculine, and the name remains masculine in German, Dutch, French, Spanish and Italian. The Old English river name

5300-407: The Marburger Rücken. Where the Wetschaft flows into it from the Burgwald forest in the north (near the Lahntal village of Göttingen), the Lahn immediately changes direction by 90° to the right. The now southward-flowing Lahn then enters the Marburg-Gießen Lahntal. Shortly before Cölbe , the Ohm enters from the left at the Lahn-Knie named area. Flowing from the Vogelsberg through the Ohmtal ,

5400-415: The Ohm is the Lahn's longest tributary, with a length of 59.7 kilometres (37.1 mi). The river then breaks through a sandstone mesa (the Marburger Rücken to the west and the Lahnberge to the east) into a valley which encompasses the entire territory of the city of Marburg and its suburbs. The valley begins after the river passes the Marburger Rücken near Niederweimar , where the Allna enters from

5500-471: The Posterior Rhine is joined by the Albula , from the east, from the Albula Pass region. The Albula draws its water mainly from the Landwasser with the Dischmabach as the largest source stream, but almost as much from the Gelgia , which comes down from the Julier Pass . Numerous larger and smaller tributary rivers bear the name of the Rhine or equivalent in various Romansh idioms, including Rein or Ragn , including: Next to Reichenau in Tamins

5600-402: The Prussian government discussed plans for the transformation of the Lahn into a canal, which would allow the passage for larger vessels, but these plans were never implemented. Only in places was the riverbed dredged, such as around 1880 near Runkel, from 1905 to 1907 from the mouth to Bad Ems, and from 1925 to 1928 from the mouth to Steeden. In 1964, an expansion of the Lahn for 300-ton vessels

5700-453: The Rhine into Lake Constance forms an inland delta . The delta is delimited in the west by the Alter Rhein and in the east by the modern canalized section of the Alpine Rhine ( Fußacher Durchstich ). Most of the delta is a nature reserve and bird sanctuary . It includes the Austrian towns of Gaißau , Höchst and Fußach . The natural Rhine originally branched into at least two arms and formed small islands by precipitating sediments. In

5800-420: The Rhine in Lahnstein , located five kilometers south of Koblenz at an elevation of 61 metres (200 ft). The Lahn area was settled as early as in the Stone Age , as shown by archeological finds near Diez, in Steeden in the community of Runkel , and in Wetzlar. Recent discoveries in Dalheim on the western edge of Wetzlar show a ca. 7000-year-old Linear Pottery culture settlement. There are also remains

5900-418: The Weilburg ship tunnel. The river bank reinforcement and channel deepening along Nassau's section of the Lahn, however, was slow. Moreover, when the lock at Limburg fell short of the width contractually agreed upon, Nassau refused an extension. This led to several clashes between Nassau and Prussia in the following years until Nassau had finally fulfilled its obligations in 1855. Despite the expansion, boats on

6000-442: The area around the river was made more habitable for humans on flood plains as the rate of flooding decreased sharply. On the French side, the Grand Canal d'Alsace was dug, which carries a significant part of the river water, and all of the traffic. In some places, there are large compensation pools, for example, the huge Bassin de compensation de Plobsheim in Alsace. The Upper Rhine has undergone significant human change since

6100-448: The border with Hesse. The source area is situated along the Eisenstraße scenic highway and the Rothaarsteig hiking trail. The river arises in the southeastern Rothaargebirge in the Ederkopf-Lahnkopf-Rücken ridge-line natural area. This ridge is the drainage divide between the Rhine and Weser , and, within the Rhine system, the watershed between the rivers Lahn and Sieg . The source is at an elevation of 600 meters (2,000 ft) and

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6200-404: The canalized Rhine into the lake. Its water has a darker color than the Rhine; the latter's lighter suspended load comes from higher up the mountains. It is expected that the continuous input of sediment into the lake will silt up the lake. This has already happened to the former Lake Tuggenersee . The cut-off Old Rhine at first formed a swamp landscape. Later an artificial ditch of about two km

6300-420: The centers Basel, Strasbourg and Mannheim-Ludwigshafen. Strasbourg is the seat of the European Parliament , and so one of the three European capitals is located on the Upper Rhine. The Upper Rhine region was changed significantly by a Rhine straightening program in the 19th century. The rate of flow was increased and the ground water level fell significantly. Dead branches were removed by construction workers and

6400-603: The changes proposed along the Rhine, one was "the Treaty for the Rectification of the Rhine flow from Neuberg to Dettenheim"(1817), which surrounded states such as Bourbon France and the Bavarian Palatinate . Loops, oxbows , branches and islands were removed along the Upper Rhine so that there would be uniformity to the river. The engineering of the Rhine was not without protest, farmers and fishermen had grave concerns about valuable fishing areas and farmland being lost. While some areas lost ground, other areas saw swamps and bogs be drained and turned into arable land. Johann Tulla had

6500-415: The creek Aua da Russein (lit.: "Water of the Russein"). In its lower course, the Anterior Rhine flows through a gorge named Ruinaulta (Flims Rockslide). The whole stretch of the Anterior Rhine to the Alpine Rhine confluence next to Reichenau in Tamins is accompanied by a long-distance hiking trail called Senda Sursilvana . The Posterior Rhine flows first east-northeast, then north. It flows through

6600-446: The early 14th century and is an indication of significant shipping on the Lahn by that time. In 1559, John VI of Nassau-Dillenburg laid out a towpath on the lower Lahn. In 1606, for the first time, the Lahn was deepened to allow small scale shipping and the lower reaches became navigable for four to five months of the year. However, there were numerous weirs with only narrow gaps, so the traffic remained restricted to small boats. In

6700-467: The existing uses. There were first tourism associations at the state level, and these have now joined into the Lahntal Tourist Association. The Lahntal bike path 'Lahntalradweg' leads through the Lahn Valley, along the Lahn Holiday Road. It is accessible from the Upper Lahn Valley Railway between Feudingen and Marburg, the Main-Weser Railway between Marburg and Giessen, as well as the Lahntal railway between Giessen and Friedrichssegen. For walkers there

6800-444: The flow is diverted off the island of Mainau into Lake Überlingen. Most of the water flows via the Constance hopper into the Rheinrinne ("Rhine Gutter") and Seerhein. Depending on the water level, this flow of the Rhine water is clearly visible along the entire length of the lake. The Rhine carries very large amounts of debris into the lake – over three million cubic meters (110,000,000 cu ft) annually. In

6900-436: The freight was unloaded onto the large barges of the Rhine, the boats took three to four days. A trip from Wetzlar to the mouth and then towed back with horses lasted for about 14 days in good conditions. At that time, there were mainly two types of transport boats in use: those with a capacity of 350 hundredweights and a larger variant with a capacity of 1300 hundredweights. In 1857 to 1863, the Lahntal railway ( Lahntalbahn )

7000-416: The goal of shortening and straightening the Upper Rhine. Early engineering projects the Upper Rhine also had issues, with Tulla's project at one part of the river creating rapids, after the Rhine cut down from erosion to sheer rock. Engineering along the Rhine eased flooding and made transportation along the river less cumbersome. These state projects were part of the advanced and technical progress going on in

7100-475: The increase in iron ore mining in the surroundings of Weilburg. An estimate from 1840 placed the quantity of iron ore transported on the entire river at approximately 2000 boat loads, though the river was only navigable from the mouth to Weilburg. In addition, mainly cereals and mineral water were transported downriver. Upriver, the boats carried primarily coal, charcoal, gypsum, and colonial goods. Around 1835, about 80 larger shallow- draft boats were in operation on

7200-645: The inflow of the Wetschaft only 2 kilometres upstream. Between the Lahn's source area in the Rothaargebirge and Gießen , all of the left tributaries are from the less mountainous parts of the West Hessian Bergland . After the turn towards the west or southwest near Gießen, all the left tributaries flow from the Hochtaunus. The right tributaries between the source area and the confluence of the Dill near Wetzlar come from

7300-519: The lake level to be lowered by about 10 meters. Previously, the two lakes formed a single lake, as the name still suggests. Like in the Obersee, the flow the Rhine can be traced in the Untersee. Here, too, the river water is hardly mixed with the lake water. The northern parts of the Untersee (Lake Zell and Gnadensee) remain virtually unaffected by the flow. The river traverses the southern, which, in isolation,

7400-565: The large influx of 2016. After the war, the city was twinned with Winchester , UK. Giessen is twinned with: Giessen is home to the basketball club Giessen 46ers , five-time champion of the Basketball Bundesliga . Its home games take place at the Sporthalle Gießen-Ost . Also, Giessen has an American football team called Giessen Golden Dragons. The Catholic Scouts of Europe were founded in Giessen in 1975. Manisch

7500-482: The local Alemannic dialect, the singular is pronounced "Isel" and this is also the local pronunciation of Esel (" Donkey "). Many local fields have an official name containing this element. A regulation of the Rhine was called for, with an upper canal near Diepoldsau and a lower canal at Fußach, in order to counteract the constant flooding and strong sedimentation in the western Rhine Delta. The Dornbirner Ach had to be diverted, too, and it now flows parallel to

7600-455: The lower Lahntal. They were later ousted by the Franks . The origin and meaning of the name Lahn are uncertain; it is possible that it is a pre-Germanic word. The form of the name changed over time; before 600, variations like Laugona, Logana, Logene or Loyn are typical. The oldest known use of the current spelling of the name dates to 1365. The oldest mention of the staple right of Diez dates to

7700-444: The mouth region, it is therefore necessary to permanently remove gravel by dredging. The large sediment loads are partly due to the extensive land improvements upstream. Three countries border the Obersee, namely Switzerland in the south, Austria in the southeast and the German states of Bavaria in the northeast and Baden-Württemberg in the north and northwest. The Seerhein is only 4 kilometers (2.5 mi) long. It connects

7800-624: The neighbouring city Wetzlar to form the new city of Lahn . However, this attempt to reorganize the administration was reversed in 1979. It was part of the Darmstadt region (regierungsbezirk) between 1945 and 1981, until the Giessen (region) was founded on 1 January 1981. A U.S. military base was located in Giessen after the Second World War. The U.S. Army Garrison of Gießen had a population of up to 10,000 American soldiers and their families. Gießen

7900-611: The north bank and Switzerland on the south, except both sides are Swiss in Stein am Rhein , where the High Rhine flows out of the lake. The High Rhine ( Hochrhein ) begins in Stein am Rhein at the western end of the Untersee. Now flowing generally westwards, it passes over the Rhine Falls ( Rheinfall ) below Schaffhausen before being joined – near Koblenz in the canton of Aargau  – by its major tributary,

8000-506: The open Sztal valley and then through Lake Walen and Lake Zurich into the Aare . The Alpine Rhine begins in the westernmost part of the Swiss canton of Graubünden , and later forms the border between Switzerland to the west and Liechtenstein and later Austria to the east. As an effect of human work, it empties into Lake Constance on Austrian territory and not on the border that follows its old natural river bed called Alter Rhein ( lit.   ' Old Rhine ' ). The mouth of

8100-534: The other hand, in the east and north. A curiosity of this border line is that the parts of the city of Mainz on the right bank of the Rhine were given to Hesse by the occupying forces in 1945. The Upper Rhine was a significant cultural landscape in Central Europe already in antiquity and during the Middle Ages . Today, the Upper Rhine area hosts many important manufacturing and service industries, particularly in

8200-741: The right. At the valley's southern end, the Zwesten Ohm enters from the Lahnberge. The right (western) side of the valley is again formed by the Gladenbacher Bergland, from which the Salzböde enters the Lahn. On the left rises the Lumda Plateau, from which the eponymous river Lumda flows into the Lahn near Lollar . Gradually the valley widens into the Gießen Basin . In Gießen , after the inflow of

8300-741: The river between Lahnau, Heuchelheim, and Dutenhofen (of Wetzlar) in the middle Lahn Valley has developed into one of the largest nature reserves in Hesse, known as the Lahnau Nature Preserve. The two most important tributaries of the Lahn, and those with the largest catchment inflows, are the Ohm and the Dill . The Dill originates in the southwestern foothills of the Rothaargebirge (the Haincher Höhe ) and enters

8400-511: The river turns again to the south, the Lahn is entrenched canyon-like below the level of the surrounding geographic trough. The city of Weilburg is wrapped by a marked loop of the river. The neck of this noose is traversed by a boat tunnel, unique in Germany. A little below Weilburg, the Weil , originating in the High Taunus, enters the Lahn. At Aumenau in the municipality of Villmar , the course of

8500-586: The river was passable for vessels with up to 240 hundredweights of cargo downstream and up to 160 hundredweights upstream. By the end of the 19th century, over 300 castles, fortresses, fortified churches, and similar buildings were built along the river. During the French occupation , inspections of the river began in 1796, which were to be followed by a comprehensive expansion. Due to political developments, however, this expansion did not take place. The newly created Duchy of Nassau eventually began work from 1808 under

8600-512: The river. Some adjacent towns are named after it, such as Rheinau , Rheineck , Rheinfelden (CH) and Rheinfelden (D). The International Commission for the Hydrology of the Rhine Basin (CHR) and EUWID contend that the river could experience a massive decrease in volume, or even dry up completely in case of drought, within the next 30 to 80 years, as a result of the climate crisis . The Rhine

8700-649: The south to the Flüela Pass in the east. The Rhine is one of four major rivers taking their source in the Gotthard region, along with the Ticino (drainage basin of the Po ), Rhône and Reuss (Rhine basin). The Witenwasserenstock is the triple watershed between the Rhine, Rhône and Po. Traditionally, Lake Toma near the Oberalp Pass in the Gotthard region is seen as the source of

8800-580: The southeastern Rothaargebirge and its foothills. From about the Bad Laasphe community of Feudingen, it turns primarily to the east. The section of the Lahn below the town of Bad Laasphe is geographically known as the Upper Lahn Valley (German: Ober Lahntal). Above Bad Laasphe, where the river flows between the Rothaargebirge on the left (i.e. to the north) and the Gladenbach Uplands on the right,

8900-412: The surface and at first does not mix with the warmer, green waters of Upper Lake. But then, at the so-called Rheinbrech , the Rhine water abruptly falls into the depths because of the greater density of cold water. The flow reappears on the surface at the northern (German) shore of the lake, off the island of Lindau . The water then follows the northern shore until Hagnau am Bodensee . A small fraction of

9000-645: The three valleys named Rheinwald , Schams and Domleschg - Heinzenberg . The valleys are separated by the Rofla Gorge and Viamala Gorge. Its sources are located in the Adula Alps ( Rheinwaldhorn , Rheinquellhorn , and Güferhorn ). The Avers Rhine joins from the south. One of its headwaters, the Reno di Lei (stowed in the Lago di Lei ), is partially located in Italy. Near Sils

9100-400: The trade name Lahntal as Middle Rhine wines. In 1999, the Lahn was classified as Biological Grade II and Chemical Grade I. Overall it is considered natural. The migrations of fish such as salmon are hindered by the river's weirs and water levels, but attempts have been made through the installation of fish ladders to reintroduce formerly native fish. After the end of gravel mining in mid-1990s,

9200-491: The upper Surselva and flows in an easterly direction. One source is Lai da Tuma (2,345 m (7,694 ft)) with the Rein da Tuma , which is usually indicated as source of the Rhine, flowing through it. Into it flow tributaries from the south, some longer, some equal in length, such as the Rein da Medel , the Rein da Maighels , and the Rein da Curnera . The Cadlimo Valley in

9300-660: The valley of the Lahn gradually narrows and at Leun enters the Weilburger Lahntal. The Weilburger Lahntal belongs to the larger Gießen-Koblenzer Lahntal physiographic province, considered part of the Rhenish Slate Mountains. In the upper area of the Weilburg Lahntal (the Löhnberg Basin) are mineral springs , such as the famous Selters mineral spring in the municipality of Löhnberg . In the lower area, where

9400-999: Was adapted in Roman-era geography (1st century BC) as Latin Rhenus , and as Greek Ῥῆνος ( Rhēnos ). The spelling with Rh- in English Rhine as well as in German Rhein and French Rhin is due to the influence of Greek orthography, while the vocalization -i- is due to the Proto-Germanic adoption of the Gaulish name as * Rīnaz , via Old Frankish giving Old English Rín , Old High German Rīn , early Middle Dutch ( c.  1200 ) Rijn (then also spelled Ryn or Rin ). The modern German diphthong Rhein (also used in Romansh ) Rein, Rain

9500-638: Was also the site of the central US army depot for all of Europe as well as the site of a special ammunition depot. The base is a converted German Army Air Field which is reflected in some of the buildings including the housing area. A theatre, known as the Keller Theatre, is a converted German Army Officers' Club. As of 28 September 2007, the Giessen Depot and all other U.S. facilities in the greater Giessen area were returned to local German authorities. The former U.S. Army buildings were used to house refugees after

9600-403: Was built, with nine major bridges and 18 tunnels along the river. Afterward, Prussia and Nassau tried to keep shipping along the Lahn alive through the lowering of tariffs. Ultimately, however, rail gained acceptance as a means of transport and cargo shipping on the Lahn gradually declined. Several projects begun in 1854 to operate steamboats on the Lahn died in their infancy. In 1875, 1885 and 1897

9700-555: Was completed. In 1981, freight shipping on the Lahn came to an end. Today, the Lahn is used exclusively for recreational boats. In 1960, gravel mining began in the broad plains of the Lahn Valley in Marburg and Giessen. This ended in 1996 and large sections of Lahn Valley in Hesse were set aside as a nature reserve On 7 February 1984, the Lahn experienced a 100-year flood, which caused millions of German Marks in damage. This has since led to

9800-464: Was dug. It was made navigable to the Swiss town of Rheineck . Lake Constance consists of three bodies of water: the Obersee ("upper lake"), the Untersee ("lower lake"), and a connecting stretch of the Rhine, called the Seerhein ("Lake Rhine"). The lake is situated in Germany, Switzerland and Austria near the Alps. Specifically, its shorelines lie in the German states of Bavaria and Baden-Württemberg ,

9900-475: Was partly realized, and the Heuchelheim Lake and Dutenhofen Lake are now popular recreational destinations for the surrounding region. Nature conservation organizations, however, were able to prevent further gravel mining, so the area is now one of the largest nature reserves in Hesse. Dutenhofen Lake marks Kilometer 0 of the Lahn as a federal waterway. The Gießen Basin is surrounded by the mountain peaks of

10000-461: Was variously inflected as masculine or feminine; and its Old Icelandic adoption was inflected as feminine. The length of the Rhine is conventionally measured in "Rhine-kilometers" ( Rheinkilometer ), a scale introduced in 1939 which runs from the 0 km datum at Old Rhine Bridge in the city of Konstanz , at the western end of Lake Constance , to the Hook of Holland at 1,036.20 km. The river

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