Publications

Approximately 418,000 pounds of triazine herbicides are applied annually to control weeds in crops grown in the Albemarle-Pamilico Sound drainage basin, located in North Carolina and Virginia. An enzyme-linked immunosorbent assay was used to detect concentrations of total triazine herbicides in streams draining into Albemarle-Pamlico Sound. Water samples were collected in May and June during the a

The U.S. Geological Survey, in cooperations with the U.S. Army Corps of Engineers, conducted a study during October 1993-April 1994 to improve an understanding of the hydrology of the Lost River watershed near Orleans, Ind. Elements of the study included: (1) constructing a map of the composite ground-water potentiometric-surface of the study area, (2) injecting and recovering fluorescent dyes at

No abstract available.

Historical scour data were collected by means of geophysical techniques and used to evaluate the scour-computation procedures recommended by the U.S. Federal Highway Administration and 12 other pub- lished pier-scour equations. Geophysical data were collected at 10 bridges in Indiana. For this evaluation it was assumed that the historical scour measured by use of geophysical techniques was associa

Water for irrigation in parts of Newton and Jasper Counties and adjacent areas of northwestern Indiana is pumped mostly from the carbonate- bedrock aquifer that underlies glacial drift. To help in managing the ground-water resources of the area, a three-dimensional ground-water model was developed and tested with hydrologic data collected during 1986 and 1988. Two major aquifers and a confining un

Water-use data for Indiana from 1960 to 1990 were analyzed to determine general trends of offstream water use. Since 1960, total withdrawals have increased, although there have been periods of increases and decreases. The largest amount of water use (14,300 Mgal/d) occurred in 1980, which was almost 2.5 times more than in 1960. There has been a general increase in withdrawals by public water suppl

The Indiana District Water-Use Program is an ongoing project with the primary goal of making Indiana water-use data available to Federal, State, and local water managers. The water-use data are obtained from a wide variety of sources. Some data are based on values reported by water users, and other data are based on a variety of estimation techniques. Statements of responsibility, documen- tation

Hydrologic data were collected near Summit Lake Reservoir for 2 years beginning October 1, 1988, and ending September 30, 1990. The data-collection network consisted of 1 reservoir-stage gage, 2 precipitation gages, 1 evaporation pan, 2 streamflow gages, and 13 observation wells. Stage-area and stage-storage relations for the reservoir were used in combination with the hydrologic data to determine

Sedimentation has had little effect on the storage capacity or surface area of Whitewater Lake. The lake was constructed by damming Silver Creek in 1949 and was dredged during 1978-81 and 1984-88. At the dam, the drainage area of Silver Creek is 19.2 square miles. Locations where the largest amount of sediment has accumulated for the 29-year period 1959-88 are in the upper part of the lake where S

Sedimentation has had little or no effect on the storage capacity or surface area of Long Lake. The lake is a natural lake that formed in unconsolidated glacial deposits. The lake is essentially two lakes: a small southern part and a large northern part. The lake receives drainage from Thumma Ditch. At the outlet of the lake, the drainage area of Thumma Ditch is 12.0 square miles. Locations where

The water-table configuration of the Calumet aquifer in the vicinity of the Grand Calumet River/Indiana Harbor Canal in Lake County, northwestern Indiana, reflects the complexity of the shallow ground-water-flow system. Large depressions in the water table in sewered areas interrupt broad ground-water divides between rivers. The aquifer/stream interactions along the Grand Calumet River/ Indiana Ha

No abstract available.