Arroyo Corte Madera del Presidio is an intermittent stream in southern Marin County, California, USA. A 1965 stream survey indicated presence of steelhead up to within 100 feet of the dam. This watercourse has a catchment basin approximating six square miles and drains the eastern slopes of Mount Tamalpais and much of the area in and around the town of Mill Valley; this stream discharges to Richardson Bay. A 1990 study indicated the water quality of upper Richardson Bay below the discharge of Arroyo Corte Madera del Presidio to be impaired by high nutrient and coliform levels;^[1] this same study indicated that Arroyo Corte Madera del Presidio is subject to periodic flooding. A running stream. ... Marin County (pronounced mah-RIN) is a county located in the North San Francisco Bay Area of the U.S. state of California, across the Golden Gate Bridge from San Francisco. ... Binomial name Oncorhynchus mykiss Walbaum, 1792 The Rainbow Trout (Oncorhynchus mykiss), also called steelhead trout, is a single species of trout native to the Pacific Ocean and in North American rivers and lakes west of the Rocky Mountains. ... Mount Tamalpais (Mount Tam) is a peak in Marin County, California, USA. It is a popular hiking destination for residents of the San Francisco Bay Area, home to the Edgewood Botanic Garden, and often considered symbolic of Marin County. ... Mill Valley is a city in Marin County, California, United States. ... Pickleweed Creek, the upper arm of Richardson Bay. ... Water quality is the chemical and physical characterization of water. ... Pickleweed Creek, the upper arm of Richardson Bay. ... This article does not cite its references or sources. ... Binomial name Escherichia coli T. Escherich, 1885 Escherichia coli (usually abbreviated to E. coli) is one of the main species of bacteria that live in the lower intestines of warm_blooded animals (including birds and mammals) and are necessary for the proper digestion of food. ... Picture of flooding in Amphoe Sena, Ayutthaya Province, Thailand For other uses, see Flood (disambiguation). ...

Fish stream surveys

The first recorded stream survey occurred in the year 1946; this survey by the California Department of Fish and Game found some healthty Oncorhynchus mykiss within the stream.^[2] The next Department of Fish and Game survey transpired in 1963, with the result that numerous individuals of steelhead were found of length varying between five and fifteen centimeters; this survey concluded that the lower 3.5 miles of the creek represented an important nursery and rearing habitat for steelhead and possibly for coho salmon. The next survey in August, 1965 concluded the habitat an excellent resource with deep shaded pools and an average of 75 steelhead per 30 meters of lineal stream. In 1984 steelhead were still found present. A 1991 stream survey documented the presence of Coho Salmon.^[3] The next survey of 1994 found abundant steelhead ranging from densitie of 0.1 to 0.7 fish per square meter.^[2] The 1997 stream survey found densities of steelhead ranging from seven to twelve fish per 30 lineal meters, depending on stream reach. Binomial name Oncorhynchus mykiss Walbaum, 1792 The Rainbow Trout (Oncorhynchus mykiss), also called steelhead trout, is a single species of trout native to the Pacific Ocean and in North American rivers and lakes west of the Rocky Mountains. ... Binomial name Oncorhynchus kisutch (Walbaum, 1792) The Coho salmon (Oncorhynchus kisutch, from the Russian кижуч kisutch) is a species of anadromous fish in the salmon family. ...

See also

• Bay mud
• Richardson Bay

Richardson Bay mudflats of are exposed layers of bay mud Bay mud consists of thick deposits of soft, unconsolidated silty clay, which is saturated with water; these soil layers are situated at the bottom of certain estuaries, which are normally in temperate regions that have experienced cyclical glacial cycles. ... Pickleweed Creek, the upper arm of Richardson Bay. ...

References

External links

• [1]