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Coupled SWAT-MODFLOW model for large-scale mixed agro-urban river basins
- Aliyari, Fatemeh, Bailey, Ryan T., Tasdighi, Ali, Dozier, André, Arabi, Mazdak, Zeiler, Kurt
- Environmental modelling & software 2019 v.115 pp. 200-210
- basins, food production, groundwater, hydrologic models, irrigation, model validation, semiarid zones, surface water, urban areas, water management, water resources, watersheds, Colorado
- Within river basins, water resources competition often exists between agricultural, municipal and industrial sectors, particularly in semi-arid regions where surface water and groundwater are managed conjunctively to sustain urban areas and food production. There is a need for physically-based modeling tools to assist with identifying successful water management strategies in these basins. This paper presents an updated version of SWAT-MODFLOW that allows application to large agro-urban river basins in semi-arid regions. Code changes include linkage between MODFLOW pumping cells and SWAT HRUs for groundwater irrigation, joint groundwater and surface water irrigation routines, and the use of MODFLOW-PSB to handle the large array of groundwater sources/sinks that exist in a highly managed river basin. Model performance is demonstrated for the 72,000 km2 South Platte River Basin, Colorado, USA. The model can be used in agro-urban river basins worldwide to assess water resources supply under a variety of scenarios.