Publications

Streamwater samples were collected from April 1993 through July 1995 at 11 fixed sites in the Western Lake Michigan Drainages Study Unit of the U.S. Geological Survey's National Water-Quality Assessment Program. Water samples were collected monthly at all Fixed Sites, and an additional two to four samples were collected each year during periods of high flow. Streamflow was monitored...

The use of hydrogen peroxide in aquaculture is growing and there is a need to develop fundamental guidelines to effectively treat diseased fish. The safety (toxicity) of hydrogen peroxide treatments was determined on eggs of representative warm- and coolwater fish species. Eggs of northern pike (Esox lucius), walleye (Stizostedion vitreum), yellow perch (Perca flavescens), white sucker...

Stream-bottom sediment and fish-tissue samples from the Red River of the North Basin, were analyzed for a large suite of chemical elements and organic chemicals. Cadmium, lead, and mercury were widespread in sediments, at concentrations not indicative of acute contamination. Mercury, the element of greatest health concern in the region, was detected at low concentrations in 38 of 43...

All of the rain samples during the growing season had detectable quantities of at least one pesticide, but most of the pesticides were only infrequently observed. The most frequently detected compounds were the herbicides alachlor, atrazine, cyanazine, and metolachlor, and in 1994, its first year of registration, acetochlor. Peak concentrations of most herbicides in rainfall occurred...

The Nett Lake Indian Reservation, about 164 square miles in area, is in northern Minnesota. About 300 people live in Nett Lake Community, about 100 people live in Palmquist Community, and a few people live in other parts of the Reservation. Water resources in the Reservation include: (1) ground water in sand and gravel aquifers and bedrock aquifers; (2) Nett Lake; (3) streams in the Nett...

This report presents hydrogeologic and water-quality data for the Lower Sioux Indian Community during 1995-97, collected by the U.S. Geological Survey in cooperation with the Lower Sioux Indian Community. The data collected include: (1) water levels, temperature, and dissolved oxygen of Larson Lake, including a vertical profile of temperature and dissolved oxygen near the center of the...

This report presents data on hydrogeology and water quality at the Upper Sioux Indian Community, located along the Minnesota River in southwestern Minnesota. Data were collected during 1994-96 by the U.S. Geological Survey in cooperation with the Upper Sioux Indian Community. The data will serve as a reference to monitor potential changes in hydrogeologic and water-quality conditions at...

Mississippian and younger geologic units form a regional system of aquifers and confining units in the central Lower Peninsula of Michigan. The area of the regional aquifer system is about 22,000 square miles. The aquifer system consists of three bedrock aquifers, which are separated by confining units. Bedrock aquifers and confining units are overlain by surficial glaciofluvial aquifers...

This research examines the effect of a rare flood on floodplain forest regeneration in a 102-km stretch of the Mississippi River beginning 21 km above the mouth of the Ohio River. The river has been restricted by levees and navigation structures and subjected to sediment dredging to maintain a stable navigation channel. Because the bank erosion–accretion process has been slowed or...

The pharmacokinetics of benzocaine during bath exposures at 1 mg/L were determined in rainbow trout acclimated at 6 °C, 12 °C or 18 °C for at least 1 month. Individual fish were exposed to benzocaine in a recirculating system for 4 h and pharmacokinetic parameters were estimated in a unique manner from the concentration of benzocaine in the bath water vs. time curve. Elimination from...

Water resources data for the 1997 water year for Minnesota consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; and water levels and water quality of ground water. This volume contains discharge records for 101 stream-gaging stations; stage and contents for 13 lakes and reservoirs; water quality for 28 stream...

To determine the effects of electrically and chemically induced immobilization on postspawn broodstock and their progeny, age‐2 and age‐3 female broodstock and age‐2 male broodstock of brown trout Salmo trutta were immobilized with electricity or tricaine methanesulfonate (MS‐222), stripped of their eggs or milt, and weighed. Eggs taken from electrically immobilized females were...