Meander Pattern Modification at Lansing, Iowa (Problem Statement)

The Experience of the St. Paul District Corps of Engineers, with State Coordination of Dredging Activities
The St. Paul District annually dredges about 1 million cubic yards of predominately clean sandy river sediments. Most of this volume comes from our maintenance of 284 miles of the 9-foot...

Intake-Shoaling and Pump-Vibration Problems
Iowa Generation's Council Bluffs Unit 3 circulating water-intake structure has experienced two major problems: (1) formation of sand bars in front of the trash racks during...

Current Hydraulics Research at the Iowa Institute of Hydraulic Research
The Iowa Institute of Hydraulic Research is engaged in fundamental and applied research on a broad range of fluid mechanics and hydraulics problems. The history and organization of the...

Sediment Transport in Pool 19, Mississippi River

Agricultural Drainage Well Impacts in Iowa

Stress-Deformation Properties of Loess and Loess-Derived Alluvium in Western Iowa

Des Moines Skywalk System
A method is proposed for estimating pedestrian traffic on a proposed skywalk system in Des Moines, Iowa. Factors that influence usage are identified. Two mathematical models are presented...

Tapered Inlet Design Using Specific Energy Curves
Design charts to simplify the hydraulic design of tapered inlet culverts for both rectangular and circular sections are presented. The use of these design charts greatly reduces the opportunity...

Iowa's Mandatory Continuing Education Law
Since July 12, 1977 Iowa has had a law requiring continuing education as a condition of license renewal for professional engineers and land surveyors. The requirements and the results...

In Situ Stress Determination by Iowa Stepped Blade
Lateral soil pressure is a vital element in soil mechanics theory and practice, but is very sensitive to disturbance and, therefore, difficult to measure. A step-tapered blade was developed...

River Quality Model for Urban Stormwater Impacts
A simplified continuous receiving water quality model has been developed as a planning guide to permit preliminary screening of areawide wastewater management strategies. The model simulates...

Modeling Stormwater Storage/Treatment Transients: Applications
The transient response of stormwater storage/treatment systems to variable forcing functions of flow and concentration is determined for completely mixed systems of constant and variable...

Pesticide Transport and Bioconcentration Model
A pesticide transport and bioconcentration model has been developed and applied to Coralville Reservoir, Iowa, for the insecticide dieldrin. Two spatial configurations, a two compartment...

Nonpoint Pollution Control; Fact or Fantasy?

What's Wrong with U.S. Transportation Infrastructure—
Federal spending for public works is being cut back. State, county and city administrations will have to bear a larger share of the load. In the case of railroads, in some areas, track...

Hybrid Cooling System Thermodynamics and Economics
Wet cooling towers can be used as helper systems with once-through cooling at river-side power-plant sites where the permissible river heat assimilation capacity is inadequate to absorb...

EPA Research in Urban Stormwater Pollution Control
This state-of-the-art on the Environmental Protection Agency's research in urban stormwater and combined sewer overflow pollution control describes the major elements of the...

Professional Development in Iowa: 1979 Surveys
Surveys conducted in Iowa in 1979 reveal that three-fourths of the licensed civil engineers and 90% of the land surveyors will meet the mandatory Professional Development requirements...

Estimating Supporting Strength of Flexible Pipes
A method for estimating deflection and load carrying capacity of flexible pipes is proposed. The Iowa formula is rearranged to express deflection as percentage of pipe diameter. This formula...

 

 

 

 

Return to search