Description of geology in Minnesota and explanations of glacial drift within the state an immediate surroundings (Wisconsin, Iowa, North Dakota and South Dakota) with sections detailing the movement of each glacier and relevant geological notes. Index starts on page 147.

From introduction: This report describes the work done and the results obtained during a study of the distribution of zinc and lead in soils, rocks, and natural waters of the southwestern Wisconsin zinc-lead area.

From introduction: The purpose of this report is to describe the geology of the rocks in the different sedimentary basins in relation to problems of disposal of liquid radioactive wastes in the ground.

From introduction: This report discusses the general geology of the Upper Mississippi Valley zinc-lead district, the distribution of ore deposits, and some relations of the ore deposits to the major geologic features.

From abstract: The purposes of this report are to determine the low-flow characteristics in the Red Cedar River Basin, where surplus water may be diverted, and to present methods to determine low-flow characteristics at additional sites.

This report presents "low-flow characteristics of streams in the Rock-Fox River basin" in Wisconsin. It includes maps and tables.

From introduction: The purpose of the low-flow characteristics are in some instances affected by the period of record. These characteristics can vary as much as +/- 30 percent at some gaging stations depending on whether or not the severe drought of the 1930's was included in the analysis.

From introduction: The purpose of this report is to describe low-flow characteristics of streams in the lower Wisconsin River basin where streamflow data have been collected and to present equations for estimating low-flow characteristics and ungaged sites.

From introduction: The purpose of this report is to develop and evaluate a method to automate the constant-rate-injection technique, described by Cobb and Bailey, with sufficient accuracy and reliability to determine discharge in storm sewers under rapidly varying flow conditions.

This report focuses on the Nevin Wetland near Madison, Wisconsin and presents a detailed report on the quality of the ground-water, it's components, and what environmental factors influence these components. It includes maps and tables.

From introduction: The purpose of this report is to describe the hydrologic system in the Lake Wingra basin, with particular emphasis on the hydrolic budget of the lake itself.

Report and Geographical Survey. Report uses a streamflow-routing model to simulate the daily flow at Park Falls over the next ten years and includes several illustrations and tables.

From abstract: This report presents the results of biologic investigations by the U.S. Geological Survey and the Wisconsin Department of Natural Resources during a study of hydrology and water quality in a small drainage basin in the "Driftless Area" of southwest Wisconsin. The investigation included aquatic macrophytes, periphytic and planktonic algae, benthic invertebrates, and trout population dynamics during 1967-78.

From abstract: Four modified nonradioactive-tracer methods and twenty predictive equations for determination of stream-reaeration coefficients (K2) in three small Wisconsin streams were compared with the radioactive-tracker methods developed by Tsivoglu.

From purpose and scope: This report describes the hydrology of selected spring ponds and the effect that dredging has had on the ponds and their surrounding areas. The report emphasizes the water budgets for the ponds, discusses the hydrologic system which contains the ponds, and briefly describes water quality in the study area.

This report presents a water budget for Cedar Lake in Wisconsin. It contains maps, tables, and graphs.

This report compares the techniques used to measure re-aeration coefficients for Black Earth Creek and the Madison Effluent Channel near Madison, Wisconsin using radioactive and modified tracers. It contains maps, graphs, and photographs.

From introduction: The purpose of this report is to present reateration-rate coefficients for the Rock River between Lake Koshkonong, Wis., and Rocktonm, Ill., for the annual minimum 7-day mean flow that occurs on the average of once in 10 years.

Abstract: Low-flow characteristics of Wisconsin streams at 415 sewage-treatment plants are presented in this report. The low-flow characteristics presented are the annual minimum 7-day mean flow that occurs on the average of once in 2 years and the annual minimum 7-day mean flow that occurs on the average of once in 10 years. The low-flow characteristics at most sewage-treatment plants were determined by correlating baseflow measurements at the sewage-treatment plants to the concurrent daily mean flow at continuous-record gaging stations in the area. The accuracy determined by the standard error of estimate for the 10-year low flow ranged from 18 percent at continuous-record gaging stations to 70 percent when only three base-flow measurements were available. The standard error of 70 percent is larger than anticipated when the project was initiated. This was the result of extremely poor base-flow conditions during the 2-year data collection period. Additional base-flow conditions will be obtained during subsequent years which will improve the standard error somewhere between 29 and 45 percent.

From abstract: This report presents estimated annual and monthly water budgets for lake Wingra and the adjacent wetland area for January 1972 through September 1977. Annually, inputs from precipitation, surface runoff, and ground-water inflow are approximately equal (31, 34, and 35 percent, respectively). Outputs include outflow from the lake into Murphy Creek (70 percent), evotranspiration from the lake and wetland (26 percent), and ground-water outflow (4 percent).

Recycling water within the local ground-water system is an effective means to increase quantity and control water temperature of the water supply and to control or avoid environmental pollution. A fish-rearing facility, operated for 15 months, returned water to the local ground-water system through an infiltration pond and recycled 83 percent of its water supply. For each 100 gallons pumped the net stress on the aquifer was equivalent to withdrawing 17 gallons. Despite recycling, nutrient content and temperature of the water supply were acceptable throughout the study period. The rearing-facility nutrient output ranged from 1 to 2 pounds of nitrate-nitrogen per day, but nitrate-nitrogen levels in the water supply remained below 4 mg/1. The water temperature ranged from 7°C to 14°C. Mathematical relations developed show that acceptable nitrate-nitrogen levels and water temperatures nearly optimum for salmonid rearing could be maintained during full-scale hatchery operation.

From abstract: Detailed knowledge of the geology of the pre-Cambrian rocks of the Lake Superior region has been greatly augmented since the publication of Monograph 52 by the United States Geological Survey in 1911. The authors have attempted in the present report to assemble as much of this new information as possible, and to give the reader a birdseye view of the geology as seen in the light of all studies made there up to the present time. Detailed descriptions are not presented, and the emphasis is placed upon the major problems of correlation. A revised map of the region, with cross sections, accompanies the report, bringing up to date a knowledge of the areal geology of the region, which otherwise could be gained only by consulting some 150 maps contained in almost as many separate local reports, many of which are unpublished.

From introduction: This study was begun in 1967 in cooperation with the Wisconsin Department of natural Resources (DNR)--its purpose was to evaluate the effects of construction of a reservoir and a floodwater-retention structure on the hydrologic system and water quality in a small basin in southwestern Wisconsin. In 1968, Federal research funds were obtained to provide for more detailed study of water quality and to extend the scope of the study to include aquatic biota.

From abstract: "This study was made to identify the best predictive equations for a stream's reareation-rate coefficient. Reaeration-rate information is needed in dissolved-oxygen modeling work, but an actual tracer measurement is not always possible."