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Effects of residential wastewater treatment systems on ground-water quality in west-central Jefferson County, Colorado
Dennis C. Hall, D. E. Hillier, Edward Nickum, W.G. Dorrance
1981, Open-File Report 81-73
The use of residential wastewater-treatment systems in Evergreen Meadows, Marshdale, and Herzman Mesa, Colo., has degraded ground-water quality to some extent in each community. Age of community; average lot size; slope of land surface; composition, permeability, and thickness of surficial material; density, size , and orientation of fractures; maintenance of...
Techniques for estimating magnitude and frequency of floods for Wisconsin streams
Duane H. Conger
1981, Open-File Report 80-1214
This report provides improved methods for estimating the magnitude and frequency of floods for Wisconsin streams. Proper design of hydraulic structures and adequate flood-plain management depend on this information. Multiple-regression techniques were used to develop equations for estimating flood frequencies at ungaged sites. The State is divided into five areas and...