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Historically water levels have been declining in Pyramid Lake; in addition, water quality has been adversely affected by upstream discharges including point and non–point sources. A number of studies have been conducted on Pyramid Lake including the application of the DSSAM hydrological river model to examine nitrogen , reactive phosphorus ...
In 1957, the Pyramid Lake level was at 3,802 ft (1,159 m) and the dry Winnemucca Lake bed at 3,780 ft (1,150 m) [19] had been dry since the 1930s. Pyramid Lake is the largest remnant of ancient Lake Lahontan, which covered much of northwestern Nevada at the end of the last ice age. It was the deepest point of Lake Lahontan, reaching an ...
Truckee River water is also supplied to the resort communities surrounding Lake Tahoe, the greater metropolitan area of Reno and Sparks, and the Pyramid Lake Paiute Indian Reservation. The U.S. Fish and Wildlife Service uses some of the water to induce spawning of the endangered fish cui-ui and to provide drought relief.
When expansion of the Reno-Sparks Wastewater Treatment Plant was proposed, the EPA decided to fund a large scale research effort to create simulation software and a parallel program to collect field data in the Truckee River and Pyramid Lake. For river stations water quality measurements were made in the benthic zone as well as the topic zone ...
The TSI of a water body is rated on a scale from zero to one hundred. [1] Under the TSI scale, water bodies may be defined as: [1] oligotrophic (TSI 0–40, having the least amount of biological productivity, "good" water quality); mesotrophic (TSI 40–60, having a moderate level of biological productivity, "fair" water quality); or
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Pyramid Lake is the only location cui-ui are found. Pyramid Lake, the second largest natural lake in the western U.S. prior to construction of the Derby Dam, has been the focus of several water quality investigations, the most detailed starting in the mid-1980s.
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