Modeling Nitrogen Movement Through Loess Soils
This study evaluates the ability of the Root Zone Water Quality Model (RZWQM) to track the movement and fate of nitrate (NO3--N)...

Submerged Vane Projects for Bank Stabilization and Sedimentation Management
Submerged vanes are small flow training devices placed in a stream to eliminate or create secondary currents to direct sediment in a controlled fashion. In recent years submerged vanes...

Flexible Pipe Design Revisited
An overwhelming soil factor in the Iowa formula and random deformations at installation affords soil a prominent role in flexible pipe; this, together with a maximal deflection rule make...

Influence of Tillage on Hydrology in Western Iowa
USDA Agricultural Research Service has operated four field-sized watersheds in the deep loess soils of western Iowa since 1964. Throughout this time, two watersheds were cropped to corn...

Fast Track Paving May Offer Applications to Structures
'Fast Track' is a technique that permits portland cement concrete pavements to be opened to traffic in a day or less after they are poured. The method has been...

Fast-Track Concrete Paving
Well known for its corn production, the State of Iowa has been seeding a new product for the past several years. 'Fast Track' concrete has grown along the edge...

Modeling a Multiple Well Groundwater Supply System
The paper is concerned with the simulation of existing groundwater supply systems. This encompasses the delivery of the groundwater from the wells to the water treatment plant, including...

Managing a Drought Through Advance Water Resources Planning: The Iowa Approach and Experience
It is important for states and local governments to devise and implement strategies for dealing with their water resource needs during a drought. This paper discusses the mechanisms that...

Burlington Cable-Stayed Bridge
The Burlington cable-stayed bridge will carry US34 over the Mississippi River from Burlington, Iowa to Gulfport, Illinois. There will be two 12-ft lanes in each direction plus an acceleration...

Iowa's Experience with Various Types of Pipe in Natural Gas Service
The Utilities Division, Iowa Department of Commerce, is responsible for the rate, service, and safety regulation of utility companies in the State of Iowa. This paper will summarize a...

Driving in the Fast Track
Fast track concrete allows traffic back on pavement within 24 hours. Fast track concrete has been developing in Iowa for the last three years. Traffic rerouting, an inconvenience that...

Concrete Overlays Challenge Asphalt
When a pavement needs more than minor repair but not total replacement, bonded and unbonded concrete overlays and inlays are options to consider. The article describes four projects where...

Modification of Meander Pattern Using Wing Dams
A sharp river bend and a highway bridge together create potentially hazardous conditions for all down-bound barge tows on the Mississippi River at Lansing, Iowa. The tendency of the river...

Emerson, Iowa Flood Warning System
A flood warning system was installed in 1985 by the Corps of Engineers at Emerson, Iowa as part of Emerson, Iowa Flood Control Project on Indian Creek. The warning system consists of two...

Borehole Shear Test and Slope Stability
Three Iowa landslides analyzed on the basis of Borehole Shear Test (BST) data are reported. The soils included CL and ML loess and glacial till, and CH clay shale. Back-calculations from...

Sulfide Control in Omaha and Cedar Rapids
Omaha, Nebraska, and Cedar Rapids, Iowa have been involved in efforts to control sulfide in major interceptors, at the influent to the treatment plants, and within the treatment facilities....

Effective Coordination With Fish and Wildlife Agencies
Recently the Federal Energy Regulatory Commission (FERC) expanded the role communications play in dealing with Fish and Wildlife Agencies. In March of 1985 the FERC publication #FERC-0100...

TPMs and Their Use: A Case Study
Transit performance measures (TPMs) are useful in identifying transit system deficiencies, which will provide management with opportunities for system modification and improvement. They...

Automated Data Monitoring for Disaster Prevention
A system is now available from International Hydrological Services for use on micro-computers that will provide real-time environmental monitoring, analysis, forecasting and control. This...

Water Quality Impacts From a Flood Control Reservoir
Both qualitative and quantitative approaches were used to evaluate the impact of a flood control reservoir located on the Des Moines River in central Iowa on seven water quality parameters:...

 

 

 

 

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