Nitrate Contamination of an Alluvial Aquifer Resulting from Irrigation and Geologic Control
A nitrate sampling program was conducted in the vicinity of a rural municipality to determine the source of nitrate contamination of the municipal groundwater supply. A finite-difference...
Optimizing Irrigation Management for Pollution Control and Sustainable Crop Yield
We developed a simulation-optimization model which maximizes crop yield while maintaining target salt concentration in the root zone, and/or preventing salt from leaching to the groundwater....
Farmers' Incentives to Reduce Groundwater Nitrates
Nitrate leaching from irrigated crops is a productive input loss to the farmer and a possible source of environmental degradation. This study uses a simulation model to analyze incentives...
Development of Test Procedures for Unbalanced Head Operation of Slide Gates
This paper will discuss the steps taken by the Bureau of Reclamation to develop a standardized procedure for testing unbalanced head operation of high-pressure slide gates for outlet works...
Furrow Irrigation Education
A furrow irrigation simulation computer model based on the volume-balance method is described. The model is used to develop information on furrow system performance that can be used in...
Optimal Commands in Border Irrigation Systems
Optimal command areas and level border irrigation design parameters are obtained for a given available seasonal water supply using a dynamic programming (DP) optimization approach. The...
An Irrigation Allocation Planning Model
An irrigation allocation model using multiperiod linear programming was developed to recommend canal water allocation among different irrigated fields to maximize net annual benefits for...
A Flexible Expert System Based Typology of Irrigation System Types
This paper describes an approach developed to classify irrigation systems into categories. It discusses the general problem of developing a typology of irrigation systems and proposes...
Development of a Hydrological Database for PROSIM?A Water Rights-Based Operational Simulation Model of the Provo River
The development of a hydrological database for a computer model of the hydrology, water rights, and operations of the Provo and Weber rivers is described. The model uses all pertinent...
AZSCHED?Software for Real-time Irrigation Scheduling
A user-friendly computer based scheduling program was developed to minimize the amount of data which needs to be input by the user by utilizing a network of twenty automated weather stations...
Flow Simulation for Surface Irrigation Design
Experience shows that even the most sophisticated and accurate computer models of the surface-irrigation process will not be widely used by design agencies unless they manifest a certain...
Software Engineering for Irrigation and Environmental Applications
Interactive, user-oriented software has been developed to enhance irrigation design, management and planning. Environmental applications were the central focus of several individual components...
Radiation Balance and Soil Water Evaporation of Bare Pullman Clay Loam Soil
Radiation and energy balance components and soil water evaporation were measured for a bare Pullman clay loam soil at Bushland, TX during the 1992 spring and summer as the soil dried following...
Streamflow Depletions Resulting from Ground Water Transfers
An application to move the point of diversion of a quasi-municipal ground water right from about 4.8 km to a second well about 0.3 km from a river channel was made in the Reno/Sparks,...
Multiquadrics in Engineering Modeling
The theory of multiquadrics (MQ) is advancing rapidly and it is usable today. When appropriate MQ can accurately interpolate for unknown values with less computational cost than Kriging....
Establishing a Drought Reserve Policy for the Monterey Peninsula Water Management District
The Monterey Peninsula Water Management District was created by the California Legislature in 1977 for the purpose of developing an integrated management program for all of the water resources...
Parameter Estimates for a Groundwater Model
This paper presents a parameter sensitivity study of a two dimensional flow and transport model of a contaminated site. Hydrogeological and site data from previous investigations were...
Simulation of Buoyant, Miscible Liquid Plumes in Heterogeneous Aquifers
Laboratory experiments have been conducted in a sand tank with a single heterogeneity into which NaNO3 is continuously injected. From samples along, across and over the depth of the tank...
An Overview of Methods to Delineate Capture Zones of Pumping Wells
Rainfall over the surface area of an unconfined aquifer, which contributes flow to a pumping well under Dupuit conditions, was estimated. Using a two-dimensional analytical model with...
A Semi-Discrete Element Approach to the River Ice Breakup and Jamming Process
A semi-discrete element approach was developed to simulate the whole river ice breakup and jamming process. In this approach, ice mass is treated as discrete elements, and the movement...
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