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3 edition of Identification and initial evaluation of irrigation return flow models found in the catalog.

Identification and initial evaluation of irrigation return flow models

Wynn R. Walker

Identification and initial evaluation of irrigation return flow models

by Wynn R. Walker

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  • 1 Currently reading

Published by Environmental Protection Agency, Office of Research and Development, Robert S. Kerr Environmental Research Laboratory, for sale by the National Technical Information Service in Ada, Okla, Springfield, Va .
Written in English

    Subjects:
  • Irrigation water -- United States -- Return flow -- Mathematical models,
  • Irrigation engineering -- Mathematical models

  • Edition Notes

    Statementby Wynn R. Walker.
    SeriesEnvironmental protection technology series -- EPA-600/2-78-144., Research reporting series -- EPA-600/2-78-144.
    ContributionsRobert S. Kerr Environmental Research Laboratory.
    The Physical Object
    Paginationviii, 124 p. :
    Number of Pages124
    ID Numbers
    Open LibraryOL17818447M
    OCLC/WorldCa4328956

    The aim of this study was to improve understanding of (a) the effects of bypass flows due to irrigation on the calibration of SWAT model, (b) irrigation return flow (IRF) and/or drainage generating processes, and (c) N leaching dynamics with simulation of agricultural land management (fertilization, irrigation, and plant species) under Cited by: 1. Assessment of irrigation return flow models / by Wynn R. Walker. EP // Extraction of chemical pollutants from industrial wastewaters with volatile solvents / by Jonathan P Identification and initial evaluation of irrigation return flow models / by Wynn R. Walker.

    irrigation efficiency under this method and gives an example of the method for irrigation schemes based on design specification. Finally the section gives/outlines some important issues (demerits) which are not addressed in the CIE method. Section two is about the evaluation of irrigation efficiency and productivity using the ISE Size: KB. Additional Index Words: erosion control, irrigation return flow quality, irrigation control. Drainage water returning to rivers and streams from irri-gated areas is commonly called irrigation return flow to distinguish it from other sources. Irrigation water that t Contribution from the Agricultural Research Service, USDA, Received 28 July

    Planning and Evaluation of Irrigation Projects: Methods and Implementation presents the considerations, options and factors necessary for effective implementation of irrigation strategies, going further to provide methods for evaluating the efficiency of systems-in-place for remedial correction as needed.. As the first book to take this lifecycle approach to agricultural irrigation, it. Citation: El-Nemr M.K. () An Interactive Spreadsheet for Drip Irrigation System Uniformity Parameters Evaluation. International Journal of Agriculture Sciences, ISSN: & E-ISSN: , Volume 4, Issue 4, pp


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Identification and initial evaluation of irrigation return flow models by Wynn R. Walker Download PDF EPUB FB2

EPA/ July IDENTIFICATION AND INITIAL EVALUATION OF IRRIGATION RETURN FLOW MODELS by Wynn R. Walker Irrigation Hydrology Company P.O. Box Fort Collins, Colorado Grant No. R Project Officer Arthur G. Hornsby Source Management Branch Robert S. Kerr Environmental Research Laboratory Ada, Oklahoma ROBERT S.

KERR. Get this from a library. Identification and initial evaluation of irrigation return flow models. [Wynn R Walker; Robert S.

Kerr Environmental Research Laboratory.]. EPA/ October ASSESSMENT OF IRRIGATION RETURN FLOW MODELS by Wynn R. Walker Agricultural Engineering Department Colorado State University Fort Collins, Colorado Grant No.

R Project Officer Arthur G. Hornsby Source Management Branch Robert S. Kerr Environmental Research Laboratory Ada, Oklahoma ROBERT S.

KERR ENVIRONMENTAL. Identification and initial evaluation of irrigation return flow models. Report EPA/, Robert S. Kerr Environmental Research Laboratory, US Environmental Protection Agency, Ada, Oklahoma.

Walker, W.R. and Skogerboe, G.V. Surface Irrigation: Theory and Practice. Recycling irrigation return flow is a water-saving measure that helps to deal with water scarcity for irrigation.

The study aims to estimate the reuse potential of irrigation return flow. Moreover, HSU(3) estimated return flow based on irrigation plan water, practical irrigation a: water, and irrigation area.

As a result, we got the usage ratio of return flow is over 10% of total irrigation water in Toyuan irrigation area, and the average return flow is 15% in Miaoli. Identification and Initial Evaluation of Irrigation Return Flow Models.

Report In Press, Robert S, Kerr Environmental Research Laboratory, Office of Research and Development, U,S, Environmental Protection Agency, Ada Oklahoma, Warrick, A. W,Time-dependent linearized : Wynn R. Walker. This paper presents the conceptualisation and model development of an irrigation return flow model, called “Tiddalik”, for the prediction of drainage return flow volumes and salt loads to streams and river systems.

Conceptualisation of the major drivers of return flows are presented along with the interaction of land use management. MODELING PROCESS FOR ASSESSING WATER QUALITY PROBLEMS AND DEVELOPING APPROPRIATE SOLUTIONS IN IRRIGATED AGRICULTURE.

Walker, W.R. Identification and Initial Evaluation Irrigation Return Flow Models. U.S. Environmental Protection Agency, Ada, Oklahoma. Identification and Initial Evaluation Irrigation Return Flow Models, U.S Author: Gaylord V.

Skogerboe, Wynn R. Walker, Robert G. Evans. A surface irrigation system applies water by flowing it across 4 Introduction to irrigation management WaterWise on the Farm WaterWise on the Farm Evaluating your surface irrigation system 5 The available flow from a district supply system can vary with changes to.

A mathematical model for evaluating irrigation systems performance. a b s t r a c t This paper proposes a spreadsheet method for continuous-time model identification.

More precisely, the. The return-flow estimates made by the method presented in this report may be used in accounting for consumptive use of water from the Colorado River as outlined in Article V of the decree by the U.S.

Supreme Court (). The method involves estimating ground-water return flow on the basis of a water budget that accounts for consumptiveCited by: 5. Irrigation return flow coefficients, i.e.

the ratio between the quantity of water returned from the cultivated area to the groundwater system and the amount of abstraction, vary by more than 50% for rice cultivation using standing water irrigation to 0% in the case of drip irrigation technique.

Repayment schedule for a loan of US$ 1 for Mutange irrigation scheme with a loan period of 20 years and an interest rate of 12% 21 Cash flow budget for Mutange irrigation scheme without considering inflation (US$) 22 Annual cash flow per farmer at Mutange irrigation scheme without considering inflation (US$) 22 File Size: KB.

MODELS FOR ANALYZING AGRICULTURAL NONPOINT-SOURCE POLLUTION Douglas A. Haith Cornell University, Ithaca, New York, USA SUMMARY Mathematical models are useful means of analyzing agricultural nonpoint-source pollution.

This review summarizes and classifies many of the available chemical transport and planning and management models. irrigation suitability analysis. Detailed and accurate data on the soil and land resources is the first requirement in evaluating land for irrigation suitability (Jafarzadeh et al, ).

Land evaluation is related with the selection of suitable land, and suitable cropping, irrigation and. address water quality concerns from irrigation return flow: “All such [irrigation return flow] sources, regardless of the manner in which the flow was applied to agricultural lands, and regardless of the discrete nature of the entry point, are more appropriately treated under the requirements of.

A comprehensive framework for conceptualizing irrigation performance is presented which, by clarifying relationships among the many incommensurate approaches to performance assessments, can provide the basis for more systematic comparative assessments of irrigation.

Irrigation systems are carefully defined, and their relationships to broader agricultural and Cited by: Evaluation of water flow and infiltration using HYDRUS model in sprinkler irrigation system Mohammad Reza Honar1+, Seyed Amir Shamsnia 2 and Alireza Gholami 3 1 Department of Water Engineering, Shiraz Branch, Islamic Azad University, Shiraz – Iran 2 Department of Water Engineering, Shiraz Branch, Islamic Azad University, Shiraz – Iran 3 Department of Water Engineering, Shiraz File Size: KB.

Evaluation of Irrigation Diversions and Return Flows. Investigator: Victor Hasfurther, Department of Civil Engineering and Wyoming Water Resources Center, University of Wyoming. Purpose: Ranching and farming are two of the oldest and largest users of water in Wyoming accounting for approximately ninety-five percent of the total amount of water withdrawn from streams and aquifers.

irrigation systems can be found in many agriculture water-related journals with the common thread in most techniques being the management component and, in a lot of cases, the requirement to actually measure the irrigation event.

This measurement of the irrigation event is known as an evaluation.The optimization of irrigation schedules is of great significance for saving water resources and ensuring food security. For the downstream of the Songhua River Basin, the key growth stages of crops were determined by the coupling degree between the effective precipitation and crop water requirement and the sensitivity indexes of the crop water production by: 2.IJRRAS 4 (2) August Bhattacharya Artificial Ground Water Recharge management during regular operations, and necessary monitoring.

Focus is kept on keeping the system design flexible, so that changing needs of the client can be integrated with existing recharge operations and Size: KB.