Sensitivity of Non-Point Source Models to Net Rainfall
A sensitivity analysis of the ANSWERS model was conducted to explore the possible impact on model outputs of discretizing rainfall input data into short time increments of various durations....
Training Water Delivery System Operators with Simulators
A graphical display training simulator has been developed on a microcomputer to mimic the operation of a multi-reservoir water delivery system. The simulator functions as a training device...
Impact of Polders Upon Flood Stage of Atrai River
A mathematical model study, using System 11 model of the Danish Hydraulic Institute, is made to assess the impact of flood control polders upon flood level of Atrai River in Bangladesh....
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...
Modeling of Nitrate Transport Coupled Dentrification in the Saturated Zone
A numerical model for simulating nitrate transport coupled to microbial activity in the saturated zone is presented. A coupled system of equations describes the transport and microbial...
An Interactive Microcomputer Program for One-Dimensional Solute Transport in Saturated Soil-Water Systems
This paper presents a user-friendly microcomputer program for one-dimensional solute transport in saturated soil-water systems. Eight different types of adsorption isotherms, ranging from...
Response of a Surface Aquifer to Flood Irrigation
The response of an unconfined alluvial aquifer, and associated stream system, to recharge by flood irrigation in the New Fork River valley in western Wyoming was studied. A water budget...
Pressure Relief Design Around Pumping Plants
Hydraulic transient protection for an irrigation pipeline pump station can include optimized operating procedures, or design of surge relief equipment such as surge relief valves, and...
The MSU Sprinkling Infiltrometer: A Device to Measure Time-to-Ponding
Time-to-ponding can be determined quickly and with minimal disturbance to the soil surface by the use of a sprinking infiltrometer developed at Michigan State University (MSU). Solenoid...
Groundwater Loadings of Pesticides From Chemigation: A Gleams Model Simulation
This paper describes how, with slight modifications, the GLEAMS model (Groundwater Loading Effects of Agricultural Management Systems) was used to represent chemigation for herbicides,...
The Water Erosion Prediction Project: Model Overview
A new generation of water erosion prediction technology is being developed by the USDA Water Erosion Prediction Project (WEPP). The WEPP models are a new erosion prediction technology...
The Water Erosion Prediction Project: Erosion Parameter Estimation
The USDA Water Erosion Prediction Project (WEPP) includes a large field program for collection of experimental data to evaluate soil erodibility. Rainfall simulation techniques are used...
Water Erosion Prediction Project Operational Computer Program
The Water Erosion Prediction Project (WEPP) is a physically-based model to improve on-site erosion prediction techniques. It is designed to replace the Universal Soil Loss Equation (USLE)...
Proper Use of Effective Flow Boundaries
The determination of the appropriate effective flow boundaries is an important factor in the hydraulic modeling of the flow regime of a stream. It is especially critical in areas with...
Mathematical Modeling of Water Balance in a Well Defined Pilot Area
This study developed a water balancing computer code, a type of book keeping method using a detailed version of the hydrologic balance equation. The purpose was to provide a method of...
Computer Control of Water Systems: Practical Considerations
Presented are some applications projects and procedures concerned with modeling and control of water supply and distribution systems. The work has resulted in the development of a suite...
Dynamic Modeling and Control Optimization in An Urban Area?A Case Study
The procedures adopted to achieve improved economic operation of the water supply and distribution system serving the town of Wolverhampton (UK) are described. An outline description is...
Computer Support for TVA's Reservoir System Operations: Hardware
The current computer systems in use at TVA for hydrologic data collection and modeling are approaching ten years old. A study is in progress to determine the computer systems needed to...
California's Adaptable Model for Operations Planning for the State Water Project
Operations of the California Aqueduct, a 440-mile-long feature of the State Water Project (SWP) consisting of canals, pipelines, reservoirs and hydroelectric plants, are planned using...
Development and Application of Hydrologic Forecast Systems
Hydrologic forecast systems generally consist of several components which include computer hardware and software to perform data handling functions and enable users to calibrate hydrologic...
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