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A Study of a Flood Control Levee Swamp System
In an attempt to reconstruct the events of the more than 100-year 1987 New Year's Eve storm that occurred on Oahu, Hawaii, an analysis of a complicated overland flow phenomenon...

The Ala Wai Canal?From Wetlands to World-Famous Waikiki
The Ala Wai Canal, a man-made tidal estuary on the island of Oahu, Hawaii, is located about a half mile (0.8 km) landward of Waikiki beach and is two miles (3.2 km) long. As Hawaii's...

Effects of Uranium Mining, Puerco River, New Mexico
Effluent from uranium-mine dewatering and acidic water released by a tailings-pond dike failure increased radionuclide activities in streamflow in the Puerco River in New Mexico and Arizona....

Geochemical Mass-Balance in a Small Forested Watershed in Southwestern Pennsylvania
An intensive hydrologic investigation of the North Fork Bens Creek Watershed on Laurel Hill in southwestern Pennsylvania was made during 1984-85. Precipitation was sampled weekly, and...

Hydrologic Change Caused by the Eruption of Mount St. Helens
On 18 May 1980, the eruption of Mount St. Helens created a massive landslide which covered 32 square miles and stripped all vegetation from 150 square miles. A study of changes in hydrologic...

Numerical Methods for Simulating Debris Blockage Failures and Mudflows
This paper presents the procedures and results from an investigation to evaluate the hydraulic characteristics of mudflow events resulting from hypothetical failures of a debris blockage...

Multicriterion Strategic Planning for Improved Irrigation Delivery Performance
An approach for assessing alternative strategies for improving an irrigation water delivery system in the context of multiple planning criteriais applied to the Alamosa River and La Jara...

Ground Water Impacts from Irrigated Ridge-Tillage
The Northern Cornbelt Sand Plain Project is a cooperative research effort between the State Agricultural Experiment Stations, USDA/Agricultural Research Service and U.S. Geological Survey...

Transportation of Cities' Colorado River Water in the Salt River Project's Canal System
Cities in the Phoenix, Arizona, metropolitan area have contracted with the Central Arizona Water Conservation District to take delivery of Colorado River water. Many of their water treatment...

Impact of Nitrogen and Water Management on Ground Water Quality
Nitrate-nitrogen (NO₃-N) concentrations in shallow ground water of the Platte River Valley in Central Nebraska have been increasing since the 1950s...

Impact of Farming Systems on Water Quality in Iowa
Increased detection of nitrate and pesticides in surface and ground water has prompted concern about the impact of farming systems on water quality. A number of studies have been incorporated...

Long-Term Effects of Tillage and Crop Rotation on the Leaching of Nitrate and Pesticides to Shallow Groundwater
Contamination of groundwater by nitrate-nitrogen (NO₃-N) and pesticides is a serious problem and concern in Iowa. The extent of contamination can...

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)...

Overview of the Ohio Management Systems Evaluation Area
The Ohio Buried Valley Aquifer Management System Evaluation Area (Ohio MSEA) project is part of a regional study developed to investigate the effects of farming systems on productivity,...

Nutrient Loads to Delaware's Inland Bays Estuary
A management plan has been developed for the Inland Bays which is a major coastal estuary. Agriculture is the largest contributor of nitrogen and phosphorus to the Inland Bays. Best management...

Phosphorus Transport from Delaware's Rural Watershed
Phosphorus loads were estimated for 62 watersheds. Major land uses in the watersheds were cropland and forestland. Annual phosphorus loads varied from 0.42 to 1.19 kg/ha. Watersheds with...

History of Irrigation Water Development in Hawaii
Hawaii has a rich heritage of irrigated agriculture from the time of the first Polynesian settlers to the present. Following the ancient stream diversions by Hawaiians, sugar planters...

Imperial Irrigation District Water Conservation
Imperial Irrigation District (IID) and Metropolitan Water District (MWD) have entered into a Water Conservation Agreement to conserve 106, 110 acre-feet (1.31 ? 10⁸...

Forecasting Irrigation Water Supply Using a Computer Model and Remotely Sensed Snow Cover
Improved streamflow forecasting in the Sevier River Basin is one objective of the Sevier River Water Management Study. Short-term forecasts are needed for optimum operations of irrigation...

Enhanced Multi-Dimensional Modelling of Marshes and Wetlands
This paper summarizes the verification and application of a two-dimensional finite element model capable of simulating the complex circulation characteristics in marshes and wetlands for...

 

 

 

 

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