Influence of lateral canal water depth on offtake and cross‐regulator discharge

Abstract

Monitoring and effective operation of control structures are of importance in a modern irrigation system. Previously developed sensitivity indicators can be useful tools for better management of irrigation systems. The influence of lateral canal water depth on the offtaking and ongoing discharges were simulated and evaluated using a simple model in the Doroodzan irrigation system in south-western Iran. Results confirmed the influence of water level changes in the lateral irrigation canal on offtake and cross-regulator discharge. Results obtained also led us to introduce and evaluate two other sensitivity indicators: offtake sensitivity to downstream water depth, and check sensitivity to tertiary canal water depth.Application of the sensitivity indicators in the Doroodzan irrigation system showed the usefulness of developed sensitivity indicators. The average sensitivity indicators varied from 1.10 to 0.44 (m À1 ) for offtakes and 0.58 to 0.03 (m À1 ) for cross-regulators.

Determination of Overall Water Delivery Performance Based on Adequacy, Efficiency, Equity and Dependability in the Doroodzan Irrigation Network

“…Shahrokhnia et al . () showed the importance of downstream water level changes on gate discharge in DIN. Shafiee () also measured delivery performance indicators in another part of DIN.…”