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59-453: The village is located along the northern shore of the Obersee lakeshore between Jona and Bollingen . Busskirch was part of the former municipality of Jona: On January 1, 2007, the former municipalities of Rapperswil and Jona merged to form the new political entity Rapperswil-Jona . Beginning in the 1st century A.D., Busskirch was a Roman lakeside settlement that served as a stage town on

118-545: A chapel next to Rapperswil Castle in 1253. In 1351 St. Martin Busskirch was incorporated by the monastery (until 1838). In co-operation with Jona the settlement formed an Allmendgenossenschaft (farmer's association), reigned by the Counts of Rapperswil , latter by the city of Rapperswil. In 1253 the parish churches of Rapperswil ( St. John's Church ) and Jona were established: St. Martin Busskirch lost its former importance and

177-755: A 1978 inventory, in 1988 the University of Geneva took a second inventory of aquatic plants in the riparian zone of the entire lake area. The lake shore in the Canton of St. Gallen was divided into 50 portions of approximately 500 metres (1,640 ft) in length and described by 12 different parameters. The most important are the plants environmental information on aquatic plants (macrophytes), divided into reeds, floating plants and submerged vegetation (pondweed and stoneworts). The dense vegetation zones are generally between 1 metre (3.3 ft) and 4 metres (13.1 ft) up to 5 metres (16.4 ft) depth. Instead of nutrients there

236-488: A handful of railway stations are present, such as Hurden , Rapperswil , Blumenau and Schmerikon ( Bollingen is closed since 2004). The line along the southern lake shore connecting Pfäffikon SZ , Altendorf , Lachen and Siebnen-Wangen in the canton of Schwyz, is provided by the Zurich S-Bahn lines S2 , S8 and S25 and IR35 . Buses are operated on both sides of the lake by the local Postauto providers and on

295-704: A lesser degree of Sägenbächlein, Wagner and Lehholz in Jona and the Linth with side channels in Schmerikon. Perennial systematic birdwatching and studies illustrate the importance of reed beds as an outstanding habitat for many bird species. Among the 15 most valuable ornithological reeds on Obersee include (Canton St. Gallen) Rapperswil Strandweg (rank 4), Bollingen Unter Stafflen (rank 7), Wurmsbach bay (rank 11), Wurmsbach nunnery (rank 12), and Schmerikoner Allmeind (rank 13). The extensive area of shallow water with its diverse flora and

354-469: A nature reserve. Together with an artificial island made of gravel, they form one of the most important waterfowl breeding areas. For this reason, fishing from the wooden bridge is prohibited, as is swimming and mooring boats in the area. Among the area around the Seedamm lake crossing and between Rapperswil and Busskirch , there are some more protected areas around Obersee. The Frauenwinkel protected area

413-409: A small river delta near Busskirch and flows at Stampf lido in the upper Lake Zurich ( Obersee ). Between Busskirch and Rapperswil respectively Jona there is a busline, provided by Verkehrsbetriebe Zürcher Oberland . 47°14′N 8°50′E  /  47.233°N 8.833°E  / 47.233; 8.833 Obersee (Z%C3%BCrichsee) The Obersee ("upper lake") is the smaller of

472-413: Is a high a load with floating mineral particles which prevents colonization of the sea floor in greater depths. The grade of colonization of the shallow water zone has risen again since the last observation in 1978, which is directly related to the increase in the maximum colonization zone. The vegetation consists four-fifths of submerged plants and only about one-fifth of emerging plants. The latter includes

531-453: Is a popular anchoring and bathing place, which represents a potential failure and thus a conflict with the high value of the shore habitats. Disorders also produce sport canoeists, leisure boats and surfboards that circulate too close to the shore. Very vulnerable with respect to disturbances mentioned are the valuable shore sections on both sides of the harbour at the Rapperswil lido. Therefore,

590-549: Is a quarry that mines Bollinger Sandstein . Bollinger Sandstein (German name) or Bollingen Sandstone is a sandstone found on Obersee lake shore, namely between Bollingen and Uznach and the Buechberg area, in the cantons of St. Gallen and Schwyz. Depending on the layer, the appearance and texture of the natural stone also varies, therefore distinct names have developed at the different mining locations: Güntliweid , Buechberg and Uznaberg . Bollinger-Lehholz sandstone

649-530: Is interrupted by settlement patterns and transport systems, the amphibians have declined in these landscapes. With regard to a cross-linking of priority areas by the lake with the backlands, the most important amphibian spawning areas have been identified in 1997. Amphibian spawning areas of national importance are situated at the Allmeind areas in Jona and Schmerikon. At the Joner Allmeind two endangered species on

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708-452: Is larger than those of Frauenwinkel or of the Jona river and Wurmsbach stream. The present marshes only comprise a small fraction of the formerly extensive, extensively used reed and meadows which offered numerous animals and plants a wide habitat. Larger areas of the present nature reserve, such as the so-called Schüttinsel , were created on the deposits of non-recyclable residual material from

767-457: Is located inmidst the protected area Nuoler Ried on the southern shore of the lake. The adjacent nature reserve Wägitaler Aa is a breeding ground paradise for various rare species of birds. In 1949 a private pilot, a flight instructor and the aviation pioneer Alfred Comte entered into a lease agreement with the Genossame (cooperative) Wangen. On 29 June 1950 for the first time a plane landed on

826-470: Is mined between Jona and Bollingen . Since the incidence even partly is mined within the Güntliweid–Bätzimatt nature reserve , Bollinger sandstone usually is extracted with wire saws that cut the stone vertically in up to 60 metres (197 ft) deep shafts. For example, the present Lehholz quarry dates back to 1252 AD when Rudolf II von Rapperswil founded the nearby Wurmsbach Abbey in Jona. It

885-470: Is missing, no data are available. For the inventory of the national fen asset protection zones, the Canton of St. Gallen evaluated and proposed, in accordance with the provisions in the national fen regulation, appropriate buffer zones, among them as fens of national importance : the lakeshore marshes west of Busskirch , Joner Allmeind marshes, the lakeside read area east of Wurmsbach , reed at Schmerikon and

944-560: Is situated on the Seedamm area in Hurden . Its reed and marsh belt has a maximal width of about 1 kilometre (0.6 mi) from the west to the east and a length of about 1.5 kilometres (0.9 mi) from the north to the south. The lake area towards Lützelau and Ufenau islands it also part of the protected area of about 3.5 kilometres (2.2 mi). Landward there is reed vegetation with large and small sedge flora, rushes, Iris sibirica , and

1003-679: Is the missing, extensively used transition to riparian vegetation. Geotopes comprise geological outcrops, boulders and river delta formations. Geological rock outcrops, i.e. scenically striking rocky ridges are found in Fuchsberg and Stafflen in Jona, Heilig Hüsli in Rapperswil and the Hörnli glacial erratic in Oberbollingen . Extensive river deltas included that of the Jona and Aabach in Schmerikon , to

1062-540: Is to enforce these rules. Once a section of the Obersee area, the former easterly lake Tuggen was landed in the early 16th century AD and for the last time mentioned in 1535 AD. Parts of the former lake were situated in the Canton of Glarus , the larger western area in the canton of St. Gallen towards Uznach . In much earlier era, Obersee and Tuggenersee also were separated by the Buechberg hill, on those eastern side

1121-561: The Frauenwinkel protected area is situated. That bigger part of the Zürichsee to the west of the Seedamm, is largely situated in the canton of Zurich , smaller parts in the cantons of Schwyz and St. Gallen ( Kempraten and Rapperswil ), whilst the upper lake is shared just between the cantons of St. Gallen and Schwyz . Zürichsee was formed by the Linth river , which rises in the glaciers of

1180-482: The Fuchsberger Horn where a species-rich forest with oak and pine trees breeds. Also worth mentioning is the small wooded area at the far end of the upper Bollingen peninsula. Outside of urban areas, the bank is often planted with different density and broad trees stocks. Extensive shore sections are occupied by large, private gardens and parks. Although often non-native and exotic shrubs and trees species occur and

1239-549: The Glarus Alps . In 1811 the Escher canal was completed, which diverted the Linth river into Walensee (Lake Walen) from where its waters are carried to the east end of Obersee by the Linth canal (completed in 1816), and separated by the Buechberg hill. No other streams of importance flow into the Obersee besides the Linth and the much smaller Jona river . Obersee is characterized by its shallow depth and, compared to its volume, by

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1298-460: The Grynau Castle is situated. Seedamm The Rapperswil Seedamm is the artificial causeway at the narrowest area of Lake Zurich between Hurden (SZ) and Rapperswil (SG). The structure contains two bridge segments and is approximately 1 kilometre (0.62 mi) long. The Seedamm carries a road ( Hauptstrasse 8 ) and a railway across the lake, with the railway being used by

1357-438: The Hurden peninsula. Before 1951 the annual water level fluctuated more than 1 metre (3.3 ft), but since then the water level is strictly regulated and therefore between summer and winter differs an average of 40 centimetres (15.7 in). The average lake level is now at 406 metres above sea level , while Obersee and Untersee differ by only 1 centimetre (0.39 in). The Seedamm between Rapperswil and Hurden

1416-505: The S5 and S40 services of Zurich S-Bahn and by Südostbahn 's Voralpen Express . The Melide causeway across a narrow section at Lake Lugano is comparable to the Seedamm. The Seedamm connects the Swiss cantons of Schwyz (Hurden) and St. Gallen (Rapperswil). The village of Hurden is located on a peninsula protruding from the south shore of Lake Zurich. This peninsula, a terminal moraine ,

1475-587: The Seedamm causeway was built in 1878, the Heilig Hüsli chapel was the only remaining structure of the prehistorical and medieval lake crossings. It stood isolated in the lake and was not accessible to visitors until the reconstruction of the former wooden bridge was erected in 2001. The lake and the small islands between the chapel, the timber piles of the Rapperswil–Hurden bridge and the Seedamm are designated as

1534-407: The bird reserves of national importance Güntliweid up to Bätzimatt at Buechberg . The reserve is located on the south lake shore, at the foothills of Buechberg, and extends from the south of Bätzimatt at Schmerikon to Güntliweid east of Lachen. It is considered as a particularly valuable resting place for waders , and may be obtained as resting place for waders on the train, although there

1593-540: The 1960s and 1970s, but that since then at a low level takes place a slight recovery. Lily as floating leaf plants covered on Untersee 0.4 ha, with a declining trend; in contrast, a doubling Obersee on 2 ha can be detected. 56 of the 61 species in the entire Zürichsee colonize the upper lake and the lower lake 34. Most frequently represented are the pondweed ( Potamogeton ); 24 species are considered rare, more than 15 very rarely. In fact, there are no more original riverside forests on lake shore, except on steep slopes like

1652-595: The Lake Zurich Navigation Company – provides with its 17-passenger ships touristic services on Lake Zurich and also on Obersee , as well as the much smaller Hensa AG, based in Rapperswil . Public transport over the Seedamm is provided by the Zurich S-Bahn lines S5 and S40 , and along the northern shore by St. Gallen S-Bahn services S6 and S17 and the Voralpen-Express , although just

1711-570: The Red List ( Yellow-bellied toad and Pelophylax ) can be found in large to very large populations. Schmerikoner Allmeind is home to the same two endangered species. For both areas the preservation and promotion of natural corridors are required, and in Schmerikon along the Linth and the side channels a large-scale networking with Kaltenbrunner Riet and other protected areas in the Linthebene region. The few existing inventory data are compiled by

1770-420: The competent fisheries overseer respectively a report in 1993. This is a rough, spatially highly generalized statement to the spawning grounds of Northern pike , Coregonus and Coregonus zugensis (commonly Albeli ). In addition to these specific fishing information, ecological data and studies on the other species of fish and their habitat requirements, but also to other creatures, such as crabs and mussels

1829-503: The decline of the reed banks and the increase in interference from recovery operations and water sports on the lake shore, the number of breeding pairs is constantly decreasing. Today the Great reed warbler is acutely threatened. According to the Red List of endangered species in Switzerland, it is listed in the top risk category of disappearing birds whose survival in Switzerland is unlikely if

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1888-412: The depths. The Walensee and Obersee are the main water suppliers for Zürichsee which is used in turn for more than a million inhabitants as drinking water storage. To ensure the quality of the drinking water supply, the water supply authorities of the city of Zurich therefore regularly examine the quality of these two lakes. The neighboring cantons of Zurich, Schwyz, Glarus and St. Gallen participate in

1947-716: The grass runway of the airfield. Since 1957 also seaplanes use the lake shore area, being today – the Ad Astra Aero airport at Zürichhorn was closed around 1931 – the last water airfield in Switzerland. The airfield track has been paved in 1967, and the airport is equipped with a VASI approach aid. The boat density on the lake is by far the highest in Switzerland: around 3,000 private boats (1.44 boats per hectare) according to studies of 1978/79 and 1.21 boats per hectare in 1972 on an area of 20.8 square kilometres (8.0 sq mi) resulting in considerable disturbances to wildlife and

2006-405: The intersection of the streets to Kempraten (Latin: Centum Prata ) respectively Zürich ( Turicum ), Winterthur ( Vitudurum ) and to Chur ( Curia Rhaetorum ) respectively on the waterway Walensee – Zürichsee to Rome's alpine route . Busskirch is first mentioned in 842/843 A.D. as Fossonas ecclesiam , in 854 as Fussinchirichun and in 1209 as Buschilche . « A little church dreaming on

2065-609: The lake » wrote Pius Rickenmann, a poet from Rapperswil, in his poem Busskirch . The early medieval Parish church of St. Martin Busskirch with its cemetery rests on the remains of a Roman building (1st to 4th century A.D.). Beginning in the 8th century, the village belonged to the Pfäfers Abbey. Busskirch is one of the oldest churches around the Lake Zürich. Even the citizens of Rapperswil had to attend services in Busskirch until Count Rudolf II of Rapperswil built his own church and

2124-506: The lawns usually are intensively cultivated, the upstream water habitats often form relatively low-noise buffer areas to the underlying recreation, transport and settlement areas. At several banks sections butt agricultural meadows and pastures directly to the water. However, the upper Bollingen peninsula is the only major agricultural area with lake access. All remaining grasslands have less than 50 metres (164 ft) lake access and are usually relatively little interference. A disadvantage often

2183-451: The marinecontrol regulations prohibit to motorboats shore independent movements within the 150 metres (492 ft) zone and slow driving within the 300 metres (984 ft) zone. For sailboats and motorboats a minimum distance of 25 metres (82 ft) from reeds and water lilies when anchoring and sailing. Individual bank sections are marked with yellow buoys, which means that these zones are closed to all vessels. The maritime police's mission

2242-496: The monitoring costs. Since the early 1970s the water quality has greatly improved thanks to extensive restructuring measures. Almost all residents in the 1,740 square kilometres (672 sq mi) large catchment area are connected to sewage plants. Although every spring a circulation of the water occurs, often a visible lack of oxygen in July below a depth of 30 metres (98 ft) is observable, which lasts for several months. Following

2301-454: The nearby gravel extraction. Schmerikoner Ried is a reed located on the northeastern lake shore in the Linthebene area towards the Grynau Castle . The protected area was set under federal protection as a low-moor bog of national importance (German: Bundesinventar der Flachmoore von nationaler Bedeutung ) in 1994. On the southwestern side, between Grynau and Lachen there is namely

2360-459: The northeastern lake shore. From Tuggen there's also a historical road heading from the former granary at the Grynau Castle over the Buechberg hill towards Siebnen . In general, the southern side of the lake is not as developed for tourism, although the Lachen lido is very popular. Also often frequented is the lido of Schmerikon at the Linth canal's estuary. The private airfield Wangen-Lachen

2419-653: The northeastern shore by the Verkehrsbetriebe Zürichsee und Oberland , respectively, in addition to local buses within Rapperswil-Jona . The pathway between Rapperswil and Schmerikon , and the wooden bridge in the Seedamm area are very popular for hiking, as well as the 'fishing village' Hurden on its southern side is often frequented by tourists. Knie's Kinderzoo situated on lake shore in Rapperswil, Busskirch , Wurmsbach Abbey and Bollingen in Jona towards Schmerikon are other points of interests on

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2478-441: The plumage change frequent disruptions for waterfowl can have deadly consequences. Also important are the widest possible retreat as cover for frightened animals. Many of the most attractive landscapes shore of Zürichsee are located in the section of the Canton of St. Gallen. Accordingly, there is rush of boats from the lower lake area, i.e. west of the Seedamm isthmus, on nice summer days. The environmentally sensitive Wurmsbach bay

2537-489: The railway line from Rapperswil railway station via Seedamm. In 1939 and 1951 the now called Seedamm causeway was reinforced to meet growing demand. Whilst the bridge sections of the Seedamm allow smaller vessels to pass under them, the main shipping channel between the lower and upper halves of Lake Zurich now passes through the Hurden ship canal , which was cut through the base of the Hurden peninsular in 1942/43, thus placing

2596-476: The rare Gentiana pneumonanthe . In certain places even transition and high marsh occurs. In the nature reserve there are European rarities, among them Phengaris alcon , Eurasian curlew and Gentiana pneumonanthe , as well as Ruspolia nitidula , a small snail. Nuoler Ried is a reed located on the north end of a large plane that was filled by the Wägitaler Aa and Spreitenbach streams. This delta

2655-401: The reed area in front of HSR area and Knie's Kinderzoo in Rapperswil . Fens of regional and local importance include the reed area east of the Busskirch church, the reed area south of Hessenhof, the small area at the parking side of the Jona mouth ( Stampf ), the embankment and so-called Kormoraninsel at Stampf , as well as the bay to the west of the upper Bollingen peninsula. After

2714-405: The reedbed: In 1850 90 hectares (222 acres) of reed beds were alone in the lower lake area yet been demonstrated. A comparison of aerial photographs from 1954 and 1987 shows in most shore sections of the machining area a significant decrease in the reed beds. The reed area has increased from 1978 to 1987 in the upper lake from 15 to 16 ha. It can be concluded that the reed banks are mostly declined in

2773-513: The riparian vegetation by the private boat traffic, as well as by the airfield. Disturbance sensitive species are those which have a large flight distance, such as Grebes and Little grebes , Common moorhen , Water rail , Gadwall and Tufted duck . These animals leave in disorders rapidly their habitat, return either not or return with some delay, only after elimination of the fault. The flight distance when passing motor and sailing boats can be up to 500 metres (1,640 ft). During

2832-551: The so-called Jakobsweg , an old pilgrimage route. In 1873 the Swiss federal parliament approved the construction of the today's stone causeway and bridge. Construction works began in 1875 and finished in 1878 (in the same year the existing wooden bridge was removed). The construction cost the sum of 1,462,000 Swiss Francs, of which 1,100,000 had been paid by the city of Rapperswil. In 1878 the Zürichsee-Gotthardbahn established

2891-421: The still widespread shore trees play an extremely important role for many bird species, both as food, breeding and resting place. A critical phase in the evolution of birds is the time of moulting , during which they are more or less incapable of flying and depending on quiet water areas. The Reed warblers inhabit the seaward edges of the reed belts and need significantly more space than other reed birds. Due to

2950-415: The threats continue. In Obersee area are three important resting places of waders: Joner Allmeind annually depending on the water level in spring and autumn, Rapperswil in winter and Schmerikoner Allmeind in spring and autumn. Many amphibian species are dependent on both natural waters for spawning, as well as on adjacent food and wintering areas. Because the connection between these two partial habitats

3009-496: The two parts of Zürichsee (Lake Zurich) in the cantons of St. Gallen and Schwyz in Switzerland . Zürichsee is the common name for the lower ( Untersee ) northwestern section of 68.2 square kilometres (26.3 sq mi), while the smaller southeastern upper ( Obersee ) lake area measures 20.8 square kilometres (8.0 sq mi), separated by the Seedamm causeway, a Molasse formation connecting Rapperswil with

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3068-434: The very large inflow from the Linth canal. The theoretical residence time of water in the upper lake at medium Linth inflow is thus only around 10 weeks. In the near-surface layers of water, a slight upward trend in average temperature has been observed, resulting in the temperature stratification of the lake being more stable much longer into late summer. The increasingly warm winters result in incomplete mixing of lake water to

3127-518: The village of Hurden on an artificial island. This canal is spanned by the Sternenbrücke , which also carries both road and railway. This causeway was renovated between March and November 2010 to allow 40 tonne trucks to cross the Seedamm. At the beginning of the 21st-century, about 75 passenger trains and 24,000 vehicles crossed the causeway and the town of Rapperswil-Jona every day, and as of 2016, an average of 26,000 vehicles. In order to relieve

3186-534: The western side of Hurden and on the southern lakeshore between Hurden and Pfäffikon. The islands Lützelau and Ufenau are located close to the Frauenwinkel . Remains of Prehistoric lake crossings were found at Freienbach–Hurden Rosshorn , an archaeological site located at one of the Seedamm's bridges. The Seedamm's predecessor was a historical wooden bridge that was first completed in 1360 and rebuilt several times. For centuries, this connection had been part of

3245-715: Was built in 1757 with stone from the Buechberg quarry. It was also used for the Fraumünster and Grossmünster churches in Zurich, as well as for the Einsiedeln and St. Gallen abbeys. Almost 2,000 cubic metres (70,629 cu ft) of sandstone still are mined (as of 2004) annually, usually 5 metres (16 ft) wide and about 3.5 metres (11 ft) high blocks weighing approximately 16 tonnes, even up to 25 tonnes. Cantons : SZ , SG . The Zürichsee-Schifffahrtsgesellschaft –

3304-459: Was formed by an ice age glacier (Linth glacier) ca. 17'000 years ago. The Hurden peninsula and the Seedamm divide the main part of Lake Zurich from its upper part, the Obersee . The Seedamm runs across an area of shallow water. The Holzbrücke Rapperswil-Hurden , a wooden pedestrian bridge built in 2001, is located to the east of the Seedamm. The mire landscape Frauenwinkel is situated on

3363-590: Was in 1945 integrated in the Roman Catholic parish Rapperswil. St. Martin Busskirch Church, which due to its idyllic lakeside location is very popular for weddings, is a remarkable landmark on the upper Lake Zürich shore. Today visitors can see the Roman ruins excavated in 1975 underneath Busskirch church. Restaurant Seegartenkeller next to St. Martin church is a popular touristic destination. Jona (river) forms

3422-525: Was transferred with oxen to the lake shore transshipping point to be shipped with so-called Ledi boats towards the present Sechsläutenplatz Zurich far into the 19th century. Particularly the present municipality of Zurich used the Bollingen quarries for the construction of countless public and private buildings, for example, the cathedral towers and the city fortifications, or the Zunfthaus zur Meisen that

3481-400: Was used since about 5,000 years as a historical lake crossing . Since the 1870s a partially artificial road causeway and two bridges were added, to cross the most narrow and flatbedded area of the lake, carrying a railway line and road from Rapperswil to Pfäffikon . Seedamm divides the southeastern section of lower Zürichsee and Obersee , connected by the Hurden canal at Hurden, where also

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