|
|
Slug additions are often the most accurate method for determining discharge when traditional current meter or acoustic measurements are unreliable because of high turbulence, rocky streambed, shallow or sheet flow, or the stream is physically inaccessible (e.g., under ice or canyon walls) or unsafe to wade (Zellweger et al., 1989, Kilpatrick and Cobb 1984, Ferranti 2015). The slug addition method for determining discharge requires an injection of a known amount of a single salt and high-frequency downstream measurement of solute concentration to capture the response curve (Kilpatrick and Cobb 1984). A new slug method was developed to determine stream discharge utilizing specific conductance and ionic molal conductivities...
|
This dataset includes data for water, sediment, and biota samples collected at 250 locations in the northwestern Sierra Nevada and the Trinity Mountains during 1999–2012. The locations were chosen to assess potential effects from historical mining, with a focus primarily on mercury contamination associated with placer gold mines in the Sierra Nevada and the Trinity Mountains, and a hard-rock mercury mine in the Trinity Mountains. Trace elements and major elements were analyzed in selected samples. All analyses of mercury, methylmercury, and (or) trace and major elements in water and sediment were performed by U.S. Geological Survey laboratories. Biota samples (invertebrates, fish, and frogs) were analyzed for mercury,...
Categories: Data;
Tags: Aquatic Biology,
California,
Environmental Health,
Geochemistry,
Hydrology, All tags...
Mineral Resources,
Sedimentology,
USGS Science Data Catalog (SDC),
Water Quality,
biota,
chemical analysis,
geoscientificInformation,
mercury contamination, Fewer tags
|
|
