Rice Irrigation Systems for Tailwater Management
Cooperative Extension
University of California
Division of Agriculture and Natural Resources
Publication No. 21490

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Publication provided courtesy of ANR

State law requires that rice growers impound pesticide-treated irrigation water until the pesticides have broken down into nontoxic chemicals. This publication provides a brief overview of three irrigation systems for tailwater management which offer alternatives to the conventional, flowthrough irrigation system. Adoption of any one of these systems will provide greater water management flexibility and reduce or eliminate the possibility of spillage during water holding periods.

End-of-Season Drain Time

ANNUAL REPORT: Comprehensive Research Report (PDF) providing information about range of optimal drain times for selected rice varieties growing in heavy clay soils. 
Research studies conducted at the CA Rice Experiment Station.