|Author:||Ward, F. A. ; Hurd, B. H. ; Rahmani, T. ; Gollehon, N.|
|Book Group Author:||NA|
Significant growth in the Rio Grande Basin's demand for water has stressed the region's scarce water supply. This paper presents an analysis of the impacts of severe and sustained drought and of minimum in-stream flow requirements to support endangered species in the Rio Grande watershed. These impacts are investigated by modelling the physical and institutional constraints within the Rio Grande Basin and by identifying the hydrologic and economic responses of all major water users. Water supplies, which include all major tributaries, interbasin transfers, and hydrologically connected groundwater, are represented in a yearly time step. A nonlinear programming model is developed to maximize economic benefits subject to hydrologic and institutional constraints. Results indicate that drought produces considerable impacts on both agriculture and municipal and industrial (MI) uses in the Rio Grande watershed. In-stream flow requirements to support endangered species' habitat produce the largest impacts on agricultural water users in New Mexico and Texas. Hydrologic and economic impacts are more pronounced when in-stream flow requirements dictate larger quantities of water for endangered species' habitat. Higher in-stream flow requirements for endangered species in central New Mexico cause considerable losses to New Mexico agriculture above Elephant Butte Reservoir and to MI users in Albuquerque, New Mexico. Those same in-stream flow requirements reduce drought damages to New Mexico agriculture below Elephant Butte Reservoir and reduce the severity of drought damages to MI users in El Paso, Texas. Results provide a framework for formulating federal policy responses to drought in the Rio Grande Basin.
|Journal:||Water Resources Research|
agriculture, catchment hydrology, drought, economic impact,endangered species, government policy, groundwater, habitats,mathematical models, optimization, programming, requirements, streamflow, water allocation, water policy, water supply, water use,watersheds, wildlife conservation, New Mexico, Texas, USA, MountainStates of USA, Western States of USA, USA, North America, America,Developed Countries, OECD Countries, Great Plains States of USA,Southwestern States of USA, Southern Plains States of USA, West SouthCentral States of USA, Southern States of USA, Gulf States of USA, RioGrande (river), Natural Resource Economics (EE115) (New March 2000),Policy and Planning (EE120), Water Resources (PP200), Meteorology andClimate (PP500), Biological Resources (General) (PP700), Mathematics andStatistics (ZZ100)