Modeling Flows in Irrigation Distribution Networks - Model Description and Prototype

Efforts are underway to rehabilitate the irrigation districts of the Rio Grande River Basin in Texas. 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. This paper reports on the methodology of a simulation model prototype for water flow in irrigation distribution networks. A description of the prototype model components and verification of the algorithms for open-channels and pipelines are presented. In order to enhance spatial data analysis, GIS data sources are incorporated. This GIS-based model prototype will play an important role in planning, analysis and development for water quantification and modernization of irrigation systems.