Analysis of Evaluation Indicators by Opportunity Time in Furrow Irrigation

آب و خاک

Article 5, Volume 28, Issue 3, July 2014, Pages 513-522   

Document Type: Research Article

DOI: 10.22067/jsw.v0i0.26538

Authors

Reza Lalehzari^{* 1}; F. Ansari Samani²; Saeid Boroomand Nasab³

¹Islamic Azad University, Ahvaz

²Shahid Chamran University of Ahvaz

³Professor, Faculty of Water Sciences Engineering, Shahid Chamran University of Ahvaz, Iran

Abstract

Evaluation procedures have been developed for effective design and management of irrigation systems. Furrow irrigation is one of the main types of applying water in agriculture. In the present study, a new procedure for field evaluation of water distribution in furrow irrigation is proposed. For this purpose, application efficiency (Ea), water requirement efficiency (Er), deep percolation (DP) and tail water ratio (TWR) have been introduced based on the average of the non-dimensional infiltrated depth values in the four data groups. The relationships between coefficient of uniformity, CU and distribution uniformity, DU have been described by opportunity time values of each quarter and using the linear equation instead of infiltration function. The proposed method was compared to other procedures by 9 scenarios of field data with different discharges and lengths. The results show that the evaluation indicators of furrow irrigation depend on the hydraulic characteristics of the soil and the opportunity time. Also, there was no observed any significant difference on the suggested indexes values and classical performance indicators.

Keywords

furrow irrigation; Application Efficiency; Uniformity; distribution

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