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OPTIONS FOR REDUCING NONPOINT POLLUTION FROM SURFACEIRRIGATED FIELDS THOUGH IMPROVED IRRIGATION
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 367-374 in Total Maximum Daily Load (TMDL) Environmental Regulations–II Proceedings of the 8-12 November 2003 Conference (Albuquerque, New Mexico USA), Publication Date 8 November 2003. .(doi:10.13031/2013.15583)
Authors: B. R. Hanson
Keywords: surface irrigation, furrow irrigation, border irrigation, nonpoint source pollution
Both surface runoff and drainage below the root zone from surface irrigation contribute to nonpoint source (NPS) pollution of surface and ground waters. Options for reducing nonpoint source pollution through improved surface irrigation are discussed herein. Irrigation system characteristics that affect nonpoint source pollution are uniformity of infiltrated water and irrigation efficiency. Drainage can be reduced by increasing the uniformity of infiltrated water by reducing field length and converting to surge irrigation. Surface runoff can be reduced using a variety of approaches such as cutoff irrigation, recirculation systems, and runoff storage systems.(Download PDF) (Export to EndNotes)