A stream is a continuous body of surface water flowing within the bed and banks of a channel . Depending on its location or certain characteristics, a stream may be referred to by a variety of local or regional names. Long, large streams are usually called rivers , while smaller, less voluminous and more intermittent streams are known as streamlets , brooks or creeks .
59-587: The Kororoit Creek is a watercourse of the Port Phillip catchment, rising in the outer north western suburbs of Melbourne , in the Australian state of Victoria . The Kororoit Creek rises below Mount Kororoit, northeast of Melton in the north western outer suburbs of Melbourne. The creek's headwaters are north of Sunbury at approximately 400 metres (1,300 ft) above sea level in ordovician geology. The creek flows generally south by east and passes over
118-403: A bed armor layer, and other depositional features, plus well defined banks due to bank erosion, are good identifiers when assessing for perennial streams. Particle size will help identify a perennial stream. Perennial streams cut through the soil profile, which removes fine and small particles. By assessing areas for relatively coarse material left behind in the stream bed and finer sediments along
177-444: A concealed position in water during spring, summer and autumn. This subspecies is very similar to Limnodynastes dumerilii insularis . This subspecies occurs in western Victoria and south-eastern South Australia. It is chiefly distinguished by range. Limnodynastes dumerilii is a burrowing frog. During dry times, and often just during the day, they will burrow underground. They will often be seen in large numbers after rain, and under
236-658: A continuous aquatic habitat until they reach maturity. Crayfish and other crustaceans , snails , bivalves (clams), and aquatic worms also indicate the stream is perennial. These require a persistent aquatic environment for survival. Fish and amphibians are secondary indicators in assessment of a perennial stream because some fish and amphibians can inhabit areas without persistent water regime. When assessing for fish, all available habitat should be assessed: pools, riffles, root clumps and other obstructions. Fish will seek cover if alerted to human presence, but should be easily observed in perennial streams. Amphibians also indicate
295-463: A continuous or intermittent stream. The same non-perennial channel might change characteristics from intermittent to ephemeral over its course. Washes can fill up quickly during rains, and there may be a sudden torrent of water after a thunderstorm begins upstream, such as during monsoonal conditions. In the United States, an intermittent or seasonal stream is one that only flows for part of
354-422: A drainage network. Although each tributary has its own source, international practice is to take the source farthest from the river mouth as the source of the entire river system, from which the most extended length of the river measured as the starting point is taken as the length of the whole river system, and that furthest starting point is conventionally taken as the source of the whole river system. For example,
413-532: A larger stream. Common terms for individual river distributaries in English-speaking countries are arm and channel . There are a number of regional names for a stream. A stream's source depends on the surrounding landscape and its function within larger river networks. While perennial and intermittent streams are typically supplied by smaller upstream waters and groundwater, headwater and ephemeral streams often derive most of their water from precipitation in
472-404: A path into mines or other underground chambers. According to official U.S. definitions, the channels of intermittent streams are well-defined, as opposed to ephemeral streams, which may or may not have a defined channel, and rely mainly on storm runoff, as their aquatic bed is above the water table . An ephemeral stream does not have the biological, hydrological, and physical characteristics of
531-412: A perennial stream and include tadpoles , frogs , salamanders , and newts . These amphibians can be found in stream channels, along stream banks, and even under rocks. Frogs and tadpoles usually inhabit shallow and slow moving waters near the sides of stream banks. Frogs will typically jump into water when alerted to human presence. Well defined river beds composed of riffles, pools, runs, gravel bars,
590-483: A perennial stream, fine sediment may cling to riparian plant stems and tree trunks. Organic debris drift lines or piles may be found within the active overbank area after recent high flow. Streams, headwaters, and streams flowing only part of the year provide many benefits upstream and downstream. They defend against floods, remove contaminants, recycle nutrients that are potentially dangerous as well as provide food and habitat for many forms of fish. Such streams also play
649-406: A slow-moving wetted channel or stagnant area. This is evidence that iron-oxidizing bacteria are present, indicating persistent expression of oxygen-depleted ground water. In a forested area, leaf and needle litter in the stream channel is an additional indicator. Accumulation of leaf litter does not occur in perennial streams since such material is continuously flushed. In the adjacent overbank of
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#1732844919063708-486: A stream as intermittent, "showing interruptions in time or space". Generally, streams that flow only during and immediately after precipitation are termed ephemeral . There is no clear demarcation between surface runoff and an ephemeral stream, and some ephemeral streams can be classed as intermittent—flow all but disappearing in the normal course of seasons but ample flow (backups) restoring stream presence — such circumstances are documented when stream beds have opened up
767-424: A stream is a critical factor in determining its character and is entirely determined by its base level of erosion. The base level of erosion is the point at which the stream either enters the ocean, a lake or pond, or enters a stretch in which it has a much lower gradient, and may be specifically applied to any particular stretch of a stream. In geological terms, the stream will erode down through its bed to achieve
826-410: A stream is called a riparian zone . Given the status of the ongoing Holocene extinction , streams play an important corridor role in connecting fragmented habitats and thus in conserving biodiversity . The study of streams and waterways in general is known as surface hydrology and is a core element of environmental geography . A brook is a stream smaller than a creek, especially one that
885-524: A thin layer called sheet wash, combined with a network of tiny rills, which together form the sheet runoff; when this water is focused in a channel, a stream is born. Some rivers and streams may begin from lakes or ponds. Freshwater's primary sources are precipitation and mountain snowmelt. However, rivers typically originate in the highlands, and are slowly created by the erosion of mountain snowmelt into lakes or rivers. Rivers usually flow from their source topographically, and erode as they pass until they reach
944-605: A vital role in preserving our drinking water quality and supply, ensuring a steady flow of water to surface waters and helping to restore deep aquifers. The extent of land basin drained by a stream is termed its drainage basin (also known in North America as the watershed and, in British English, as a catchment). A basin may also be composed of smaller basins. For instance, the Continental Divide in North America divides
1003-435: Is a stream that branches off and flows away from a main stream channel, and the phenomenon is known as river bifurcation . Distributaries are common features of river deltas , and are often found where a valleyed stream enters wide flatlands or approaches the coastal plains around a lake or an ocean . They can also occur inland, on alluvial fans , or where a tributary stream bifurcates as it nears its confluence with
1062-404: Is controlled more by long-term patterns of precipitation. The stream encompasses surface, subsurface and groundwater fluxes that respond to geological, geomorphological, hydrological and biotic controls. Streams are important as conduits in the water cycle , instruments in groundwater recharge , and corridors for fish and wildlife migration. The biological habitat in the immediate vicinity of
1121-569: Is fed by a spring or seep . It is usually small and easily forded . A brook is characterised by its shallowness. A creek ( / k r iː k / ) or crick ( / k r ɪ k / ): In hydrography, gut is a small creek; this is seen in proper names in eastern North America from the Mid-Atlantic states (for instance, The Gut in Pennsylvania, Ash Gut in Delaware, and other streams) down into
1180-425: Is sometimes termed a "young" or "immature" stream, and the later state a "mature" or "old" stream. Meanders are looping changes of direction of a stream caused by the erosion and deposition of bank materials. These are typically serpentine in form. Typically, over time the meanders gradually migrate downstream. If some resistant material slows or stops the downstream movement of a meander, a stream may erode through
1239-500: Is the most variegated of the subspecies, often with patches or blotches of a different colour on the dorsal surface. The call of this species sounds more like a "tok", similar but louder than the striped marsh frog . This is the most restricted of the subspecies. It is only found in the Snowy Mountains area of south-eastern New South Wales. Males call from ponds or pools of streams in spring and summer. Due to its restricted range it
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#17328449190631298-409: Is unlikely to be confused with other subspecies, however it is pale on the dorsal surface with fairly indistinct patches or variegations. This subspecies occurs south of Jervis Bay , along the south coast of New South Wales, in eastern Victoria and throughout Tasmania. It is characterised and distinguished by blue coloration present on the flank. There is often a pale mid-dorsal stripe. Males call from
1357-456: Is usually called a creek and marked on topographic maps with a solid blue line. There are five generic classifications: "Macroinvertebrate" refers to easily seen invertebrates , larger than 0.5 mm, found in stream and river bottoms. Macroinvertebrates are larval stages of most aquatic insects and their presence is a good indicator that the stream is perennial. Larvae of caddisflies , mayflies , stoneflies , and damselflies require
1416-663: The Tombigbee River basin. Continuing in this vein, a component of the Mississippi River basin is the Ohio River basin, which in turn includes the Kentucky River basin, and so forth. Stream crossings are where streams are crossed by roads , pipelines , railways , or any other thing which might restrict the flow of the stream in ordinary or flood conditions. Any structure over or in a stream which results in limitations on
1475-542: The West Gate Freeway and Federation Trail at Brooklyn. The Kororoit Creek Trail runs along the banks in the lower reaches of the creek. The traditional custodians of the land surrounding the creek are the Wurundjeri people who had hunted, fished mulloway and tiger sharks in rare occasions. and camped along the creek for thousands of years. Aboriginal occupation is evident in the form of many scattered artefacts along
1534-476: The velocity of the stream. A perennial stream is one which flows continuously all year. Some perennial streams may only have continuous flow in segments of its stream bed year round during years of normal rainfall. Blue-line streams are perennial streams and are marked on topographic maps with a solid blue line. The word "perennial" from the 1640s, meaning "evergreen," is established in Latin perennis, keeping
1593-675: The Caribbean (for instance, Guinea Gut , Fish Bay Gut , Cob Gut , Battery Gut and other rivers and streams in the United States Virgin Islands , in Jamaica (Sandy Gut, Bens Gut River, White Gut River), and in many streams and creeks of the Dutch Caribbean ). A river is a large natural stream that is much wider and deeper than a creek and not easily fordable, and may be a navigable waterway . The linear channel between
1652-637: The Kororoit Creek makes its way down through many suburbs towards its mouth, including the towns and suburbs of Rockbank , Caroline Springs , Burnside , Kings Park , Albanvale , Deer Park , Cairnlea , West Sunshine , Ardeer , Albion , Brooklyn and Altona North . The creek is traversed by the Melton Highway , east of Melton; the Western Highway and the Western Ring Road , at Ardeer; and
1711-533: The atmosphere either by evaporation from soil and water bodies, or by plant evapotranspiration. By infiltration some of the water sinks into the earth and becomes groundwater, much of which eventually enters streams. Most precipitated water is partially bottled up by evaporation or freezing in snow fields and glaciers. The majority of the water flows as a runoff from the ground; the proportion of this varies depending on several factors, such as climate, temperature, vegetation, types of rock, and relief. This runoff begins as
1770-595: The banks of the creek. Native species of frogs have taken advantage and reclaimed residences in the new (man-made) wetlands and lakes. The eastern banjo frog , common eastern froglet and even the now endangered growling grass frog have been seen and heard in the new wetlands and around Kororoit Creek, particularly in Cairnlea . Aquatic species found in the creek include the common galaxias , short-finned eel , Australian smelt , tupong , common carp, eastern bluespot goby, and flathead gudgeon. Bird species found adjacent to
1829-525: The base level of erosion throughout its course. If this base level is low, then the stream will rapidly cut through underlying strata and have a steep gradient, and if the base level is relatively high, then the stream will form a flood plain and meander. Typically, streams are said to have a particular elevation profile , beginning with steep gradients, no flood plain, and little shifting of channels, eventually evolving into streams with low gradients, wide flood plains, and extensive meanders. The initial stage
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1888-586: The base stage of erosion. The scientists have offered a way based on data to define the origin of the lake. A classified sample was the one measured by the Chinese researchers from the University of Chinese Academy of Sciences. As an essential symbol of the river formation environment, the river source needs an objective and straightforward and effective method of judging . A calculation model of river source catchment area based on critical support flow (CSD) proposed, and
1947-564: The creek include the Australasian darter , little pied cormorant , brown falcon , peregrine falcon , square-tailed kite , dusky moorhen , royal spoonbill , black swan , Pacific black duck , mallard , Australian wood duck , galah , rainbow lorikeet , white-faced heron , Australian white ibis , and wattlebird . Both the river blackfish and the platypus are native species that are now believed to be extinct along creek's course. Common introduced species that can be found adjacent to
2006-478: The creek include the red fox and the European rabbit . Perennial stream The flow of a stream is controlled by three inputs – surface runoff (from precipitation or meltwater ), daylighted subterranean water , and surfaced groundwater ( spring water ). The surface and subterranean water are highly variable between periods of rainfall. Groundwater, on the other hand, has a relatively constant input and
2065-498: The creek. Scar trees, where canoes were carved from the bark of the red gums, are dotted along the creek. European explorers, James Flemming and Charles Grimes identified the Kororoit Creek in 1803, along with the Maribyrnong River and Yarra River . The Brooklyn Bluestone Bridge was built over the Kororoit Creek at Brooklyn in the 1870s. The bridge was built using bluestone from the local area and still stands. The bridge
2124-432: The east and west borders along the creek. Native reptiles, including tiger snake , eastern blue-tongued lizard , common snakeneck turtle and eastern brown snake were often seen along the creek. Unfortunately due to overdevelopment these species are now rarely seen in some areas. Reptiles found along the creek help to maintain the balance of the populations of small mammals such as water rats and mice that thrive along
2183-592: The five subspecies. It is found in South-East Queensland , the Australian Capital Territory , the slopes and ranges of New South Wales , northern Victoria and the Murray River into South Australia . This subspecies normally inhabits woodland, heathland and farmland. Breeding takes place in streams, ponds and dams. Males of this subspecies have the most characteristic banjo-like "bonk" of all
2242-689: The flow is reduced to a trickle or less. Typically torrents have Apennine rather than Alpine sources, and in the summer they are fed by little precipitation and no melting snow. In this case the maximum discharge will be during the spring and autumn. An intermittent stream can also be called a winterbourne in Britain, a wadi in the Arabic -speaking world or torrente or rambla (this last one from arabic origin) in Spain and Latin America. In Australia, an intermittent stream
2301-447: The form of rain and snow. Most of this precipitated water re-enters the atmosphere by evaporation from soil and water bodies, or by the evapotranspiration of plants. Some of the water proceeds to sink into the earth by infiltration and becomes groundwater, much of which eventually enters streams. Some precipitated water is temporarily locked up in snow fields and glaciers , to be released later by evaporation or melting. The rest of
2360-524: The lake has significant feeder rivers. The Kagera River, which flows into Lake Victoria near Bukoba's Tanzanian town , is the longest feeder, though sources do not agree on which is the Kagera's longest tributary and therefore the Nile's most remote source itself. To qualify as a stream, a body of water must be either recurring or perennial. Recurring (intermittent) streams have water in the channel for at least part of
2419-653: The mainly easterly-draining Atlantic Ocean and Arctic Ocean basins from the largely westerly-flowing Pacific Ocean basin. The Atlantic Ocean basin, however, may be further subdivided into the Atlantic Ocean and Gulf of Mexico drainages. (This delineation is termed the Eastern Continental Divide .) Similarly, the Gulf of Mexico basin may be divided into the Mississippi River basin and several smaller basins, such as
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2478-412: The meaning as "everlasting all year round," per "over" plus annus "year." This has been proved since the 1670s by the "living years" in the sense of botany. The metaphorical sense of "enduring, eternal" originates from 1750. They are related to "perennial." See biennial for shifts in vowels. Perennial streams have one or more of these characteristics: Absence of such characteristics supports classifying
2537-418: The movement of fish or other ecological elements may be an issue. Eastern banjo frog L. d. dumerilii Peters , 1863 L. d. fryi Martin, 1972 L. d. grayi Steindachner , 1867 L. d. insularis Parker , 1940 L. d. variegata Martin, 1972 Limnodynastes dumerilii is a frog species from the family Limnodynastidae . The informal names for
2596-453: The neck between two legs of a meander to become temporarily straighter, leaving behind an arc-shaped body of water termed an oxbow lake or bayou . A flood may also cause a meander to be cut through in this way. The stream load is defined as the solid matter carried by a stream. Streams can carry sediment, or alluvium. The amount of load it can carry (capacity) as well as the largest object it can carry (competence) are both dependent on
2655-579: The origin of the Nile River is the confluence of the White Nile and the Blue Nile, but the source of the whole river system is in its upper reaches. If there is no specific designation, "length of the Nile" refers to the "river length of the Nile system", rather than to the length of the Nile river from the point where it is formed by a confluence of tributaries. The Nile's source is often cited as Lake Victoria, but
2714-415: The parallel ridges or bars on a shoreline beach or river floodplain, or between a bar and the shore. Also called a swale . A tributary is a contributory stream to a larger stream, or a stream which does not reach a static body of water such as a lake , bay or ocean but joins another river (a parent river). Sometimes also called a branch or fork. A distributary , or a distributary channel ,
2773-465: The relationship between CSA and CSD with a minimum catchment area established. Using the model for comparison in two basins in Tibet (Helongqu and Niyang River White Water), the results show that the critical support flow (Qc) of the housing dragon song is 0.0028 m /s. At the same time, the white water curvature is 0.0085 m /s. Besides, the critical support flow can vary with hydrologic climate conditions, and
2832-503: The right conditions mass spawning can occur over just a few days. They have been known to call while underground, and can do so at any time of the year after rain. The Eastern banjo frog was the first of the species to have its reference genome sequenced, finding a compact (for an amphibian) 2.38 Gb genome and 24,548 protein-coding genes. Breeding occurs in stagnant aquatic habitats like ponds or swamps. During November to February, males will begin calling from behind vegetation or from within
2891-425: The side of the stream or within the floodplain will be a good indicator of persistent water regime. A perennial stream can be identified 48 hours after a storm. Direct storm runoff usually has ceased at this point. If a stream is still flowing and contributing inflow is not observed above the channel, the observed water is likely baseflow. Another perennial stream indication is an abundance of red rust material in
2950-469: The species and its subspecies include eastern or southern banjo frog , and bull frog . The frog is also called the pobblebonk after its distinctive "bonk" call, which is likened to a banjo string being plucked. There are five subspecies of L. dumerilii , each with different skin coloration. The species is native to eastern Australia . There has been one occurrence in New Zealand , when tadpoles of
3009-401: The species were found in 1999 and destroyed. Adults are roughly seven to eight centimetres long with dark warty backs, a prominent tibial gland, fleshy metatarsal tubercules and a smooth white or mottled belly. The tadpole stage is relatively long, lasting up to fifteen months. The species is common. The five subspecies of Limnodynastes dumerilii are: This is the most widespread of
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#17328449190633068-525: The subspecies. They are distinguished from other subspecies by more orange present on the flank and orange raised stripe present from the eye to the shoulder. The subspecies is normally one solid colour on the dorsal surface. This subspecies occurs along the coast of New South Wales, south to Jervis Bay . It inhabits coastal swamps, dams, ponds associated with forest and heathland. This species does not breed in flowing water, which helps with distinguishing it from L. d. dumerilii in places where both occur. This
3127-655: The vital support flow Qc in wet areas (white water) is larger than in semi-arid regions (heap slot). The proposed critical support flow (CSD) concept and model method can be used to determine the hydrographic indicators of river sources in complex geographical areas, and it can also reflect the impact of hydrologic climate change on river recharge in different regions. The source of a river or stream (its point of origin) can consist of lakes, swamps, springs, or glaciers. A typical river has several tributaries; each of these may be made up of several other smaller tributaries, so that together this stream and all its tributaries are called
3186-711: The volcanic lava plain of western Melbourne to its mouth at sea level, north of Altona and emptying into Altona Bay within Port Phillip. The creek is joined by one minor tributary as it descends approximately 407 metres (1,335 ft) over its 52-kilometre (32 mi) course . At the outlet in Altona Bay, the creek winds its way through the Altona Coastal Park and then the Jawbone Marine Sanctuary Park, where it enters Port Phillip. From east of Sunbury,
3245-400: The water at females. Eggs are laid on the surface of bodies of water in the form of a distinct foamy mass, the frog can lay up to 4000 eggs. Tadpoles reach up to 7cm, a dark and gold spotted appearance and take 4-5 months to mature into frogs. In Western Australia the western banjo frog, Limnodynastes dorsalis , is common around Perth . It also has a musical, resonant "plonk" call and
3304-512: The water flows off the land as runoff, the proportion of which varies according to many factors, such as wind, humidity, vegetation, rock types, and relief. This runoff starts as a thin film called sheet wash, combined with a network of tiny rills, together constituting sheet runoff; when this water is concentrated in a channel, a stream has its birth. Some creeks may start from ponds or lakes. The streams typically derive most of their water from rain and snow precipitation. Most of this water re-enters
3363-513: The year and is marked on topographic maps with a line of blue dashes and dots. A wash , desert wash, or arroyo is normally a dry streambed in the deserts of the American Southwest , which flows after sufficient rainfall. In Italy, an intermittent stream is termed a torrent ( Italian : torrente ). In full flood the stream may or may not be "torrential" in the dramatic sense of the word, but there will be one or more seasons in which
3422-402: The year. A stream of the first order is a stream which does not have any other recurring or perennial stream feeding into it. When two first-order streams come together, they form a second-order stream. When two second-order streams come together, they form a third-order stream. Streams of lower order joining a higher order stream do not change the order of the higher stream. The gradient of
3481-627: Was one of the first crossings built for gold diggers heading to the gold fields of Ballarat . Kororoit is an Aboriginal word of the Woiwurrung language that has been used to describe the "creek on (the) western plain"; with an alternate theory that claims the word to mean a "male kangaroo". The creek is home to significant animal species such as the growling grass frog and the striped legless lizard , as well as migratory birds. Remnant native vegetation also survives in some places, including red river gum and white mangroves. Small parks are located on
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