Efforts are underway to rehabilitate the irrigation districts,such as in the Rio Grande Basin in Texas.Water distribution network models are needed to help prioritize and analyze various rehabilitation options,as well...Efforts are underway to rehabilitate the irrigation districts,such as in the Rio Grande Basin in Texas.Water distribution network models are needed to help prioritize and analyze various rehabilitation options,as well as to scientifically quantify irrigation water demands,usages,and losses,and to help manage gate automation.However,commercially available software packages were limited in applications due to their high cost and operational difficulty.This study aims to develop a modeling tool for modeling the water flow profile in irrigation distribution networks.The goal of developing the modeling tool was to make the modeling process simple,fast,reliable and accurate.On the basis of methodological study,the modeling tool has been developed for branching canal networks with the assumption of steady gradually varied flow.The flow profile calculation of the tool was verified from a single channel with 1%root mean squared error compared to the benchmark calculation and a branching network with 5%to 12%relative errors compared to check point measurement along the network.The developed modeling tool will be able to play an important role in water quantification for planning,analysis and development for modernization of irrigation systems.展开更多
基金supported by USDA-Cooperative State Research,Education,and Extension Service(project no.2005-45048-03208)administered by the Texas Water Resources Institute.
文摘Efforts are underway to rehabilitate the irrigation districts,such as in the Rio Grande Basin in Texas.Water distribution network models are needed to help prioritize and analyze various rehabilitation options,as well as to scientifically quantify irrigation water demands,usages,and losses,and to help manage gate automation.However,commercially available software packages were limited in applications due to their high cost and operational difficulty.This study aims to develop a modeling tool for modeling the water flow profile in irrigation distribution networks.The goal of developing the modeling tool was to make the modeling process simple,fast,reliable and accurate.On the basis of methodological study,the modeling tool has been developed for branching canal networks with the assumption of steady gradually varied flow.The flow profile calculation of the tool was verified from a single channel with 1%root mean squared error compared to the benchmark calculation and a branching network with 5%to 12%relative errors compared to check point measurement along the network.The developed modeling tool will be able to play an important role in water quantification for planning,analysis and development for modernization of irrigation systems.
