Spatial and temporal analysis of agricultural water requirements in the Gulf Coast of the United States

被引:10
|
作者
Ritschard, RL
Cruise, JF
Hatch, LU
机构
[1] Univ Alabama, Dept Biol Sci, Huntsville, AL 35806 USA
[2] Univ Alabama, Dept Civil & Environm Engn, Huntsville, AL 35899 USA
[3] Auburn Univ, Dept Agr Engn, Auburn, AL 36849 USA
关键词
agricultural hydrology; hydrograph analysis and modeling; irrigation; meteorology/climate; surface water hydrology; water demand; water policy/regulation/decision making; water resources planning;
D O I
10.1111/j.1752-1688.1999.tb04239.x
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Competition for water resources is becoming an increasingly important issue in the southeastern U.S. The potential impacts of future precipitation and runoff estimated by a transient global climate model (HADCM2) on competing water resources in the Southeast has been conducted. Issues of agricultural management, irrigation water withdrawals, and water quality were studied over three time periods: 1974-1993, 2020-2039, and 2080-2099 in five water basins identified previously as exhibiting water-related problems. These basins, which encompass the boundary between Alabama and Mississippi, cover four important agricultural counties in Mississippi. Irrigation water requirements generated by crop growth models for corn, soybeans, and winter wheat were coupled with monthly runoff for the impacted basins estimated by the SWAT water balance model. The results of the study reveal that in the next 20-40 years water availability in the southern portions of the study area will decline as much as 10 percent during times when water requirements for agricultural production are crucial. Maintaining or expanding existing crop yields under future climate regimes may require additional irrigation water and increase competition among other uses such as domestic, industrial, recreational, and ecosystem quality.
引用
收藏
页码:1585 / 1596
页数:12
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