Publications

The Little Fork River watershed is one of 39 watershed units designated by the Minnesota Department of Natural Resources for evaluation of the State 's water resources. Included is an appraisal of the occurrence, quantity, quality, and availability of ground and surface waters. Water resources are not intensively developed anywhere in the watershed. Essentially all water used is...

This Hydrologic Atlas is one of series describing the 39 watershed units in Minnesota. The 1,750 sq mi in the Rock River watershed are glaciated upland plain including all of Rock County and parts of Pipestone, Murray, Lincoln, Nobles and Jackson Counties. The average annual water budget shows 25.8 inches precipitation, 3.1 inches surface runoff and 22.7 inches evapotranspiration. Water...

The Helley-Smith bedload sampler operates on a pressure-difference principle and consists of an expanding nozzle, nylon-mesh sample bag , and external components for structural integrity and stability under flow conditions. The Helley-Smith bedload sampler has a hydraulic efficiency, the ratio of the mean velocity in the sampler nozzle to the mean ambient velocity, of approximately 1.54...

The watershed includes 1,481 lakes that are 10 acres (4 square hectometers) or larger (Minnesota Division of Waters, Soils, and Minerals, 1968). The area of these lakes total about 435,000 acres (176,000 hm2) or 15 percent of the watershed. Most of the lakes are smaller than 250 acres (101 hm2) (graph); data pertaining to selected large lakes are given in the table below. More than 60...

The purpose of this report is to provide information on the extent, depth, frequency of flooding that will affect the lands adjacent to the upper Yahara River in Dane County, Wis.

No abstract available.

Sediment data of some form have been collected by the U.S. Geological Survey at 118 stream-gaging sites throughout Wisconsin, beginning in 1935. The average concentration of suspended sediment for Wisconsin streams is low in comparison with that of many streams in the United States—110 milligrams per litre for Wisconsin, as compared with 600 milligrams per litre for 50 percent of the...

No abstract available.

The Des Moines River drains about 1,350 square miles (3,496 km2) of the north, west, and central parts of the watershed, and the East Fork Des Moines River along with several small creeks drain about 200 square miles (518 km2) in the east part. These tributaries join the Des Moines river in Iowa. The watershed is on the Coteau des Prairies, the most prominent upland in southern Minnesota...

No abstract available.

No abstract available.

The study of ice in the upper Great Lakes, both from the operational and the scientific points of view, is receiving continued attention. Quantitative and qualitative field work is being conducted to provide the needed background for accurate interpretation of remotely sensed data. The data under discussion in this paper were obtained by a side-looking multiplexed airborne radar (SLAR)