Modeling the Distinction Between Regional Flow and Flow to Drains
Previous research at the Newlands Agricultural Research Center, in Fallon, Nevada, suggests that the quality of the water flowing to the 15 subsurface drain laterals in related to the...
Optimizing Conjunctive Water Use in a Dynamic Stream-Aquifer System with US/REMAX
Long-term water management planning models frequently use large time steps and must employ fairly crude assumptions (such as average climatic conditions, etc.). Managing stream aquifer...
Water Distribution Plan Utah Lake/Jordan River Basin
The Utah Lake/Jordan River basin is comprised of several river systems that are hydrologically related but, for the most part, have been managed and operated separately. To further complicate...
Application of Distributed Parameter Watershed Model for Determining the Effects of Climate Change on Water Resources
Projected scenarios of climate change are likely to have significant effects on hydrology and water resources in the semi-arid western United States. The paper describes the application...
Climate Change: Is Trouble Ahead for Water Engineers?
Very long range forecasts of future global warming from 2 to 5?C have been made as a result of the increase in carbon dioxide and trace gases in the atmosphere due to man's activities....
Effect of Agricultural Drainage on Water Quality in the Mid-Atlantic States
Agricultural drainage development in the form of drainage alone and controlled drainage-subirrigation (CD-SI) has created conflicts with environmental concerns. Most concerns the lack...
Effect of Agricultural Drainage on Water Quality in the Humid Portion of the Pacific Northwest
Agricultural drainage first began in Washington around 1830 and in Oregon around 1840. The first efforts to drain soils for agricultural use began by constructing shallow ditches spaced...
Evaporation Pond Hydrology
Drainwater evaporation ponds are impoundment facilities designed for drainwater disposal by evaporation. In California, these ponds are typically constructed on the clay soils of the western...
A GIS Approach for Studying Irrigation Management Alternatives to Reduce Salt Loading of River Basins
As part of an ongoing effort to improve the water quality of the Colorado River, many methods have been employed to analyze the overall benefits of alternate irrigation management practices...
Managing Irrigation in the Presence of Groundwater
A method was developed to use lysimeter data for groundwater contribution to crop water use in the irrigation scheduling procedure for a subsurface drip irrigated field underlain by shallow...
Irrigating Lettuce with Buried Drip, Surface Drip, and Furrow Irrigation Systems: Overall Performance
Groundwater nitrate contamination is a major concern in the Salinas Valley of California. The source of much of the nitrate appears to be vegetable production in the valley. A field-scale...
AGWATER?
The AGWATER computer program is an interactive learning, teaching, and pre-season evaluation tool regarding agricultural irrigation. It combines the concepts of irrigation scheduling,...
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...
BASIN 2.0 for the Design of Level-Basin Irrigation Systems
The purpose of this paper is to present a computer program for the hydraulic design of level-basin irrigation systems. The first of three design modes provides design based on the advance...
CPIVOT v 2.0 Center Pivot Analysis and Design Software
A micro-computer based software package is presented which can be used for hydraulic design and/or analysis of center pivot irrigation systems. The software is written in C and requires...
Density Fluctuations and Use of the Krypton Hygrometer in Surface Flux Measurements
The magnitude of the of the Webb et al. (1980) density corrections on water vapor fluxes due to the flux of sensible heat is examined in terms of the Bowen ratio. The correction due to...
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