Long run optimization of landscape level irrigation through managed aquifer recharge or expanded surface reservoirs

JOURNAL OF HYDROLOGY

卷:579

Article

Tran, Dat¹  Kovacs, Kent¹  Wallander, Steven² 

[1] Univ Arkansas, Dept Agr Econ & Agribusiness, 217 Agr Bldg, Fayetteville, AR 72701 USA

[2] ERS, USDA, 1400 Independence Ave SW,Mail Stop 1800, Washington, DC 20250 USA

关键词: Optimization model;    Spatial-dynamic;    Long-run aquifer management;    Managed aquifer recharge;   

DOI  :  10.1016/j.jhydrol.2019.124220

来源: Elsevier

【 摘 要 】

Decades of efforts to reduce groundwater overdraft through investment in irrigation efficiency has, in many cases, failed to reduce aquifer depletion. This is one reason for greater attention to water supply augmentation efforts through the capture of surface water during high flow events for managed aquifer recharge (MAR) or additional surface storage. We use a landscape level model to examine the optimal interaction among MAR, surface reservoir storage, crop choice, and groundwater conservation policies in Eastern Arkansas. We find the cost of MAR water must be less than half the average groundwater pumping cost to increase the aquifer level. Increases in irrigation intensive crops mean that only a fraction of the recharged water raises groundwater levels. We observe that policies to conserve groundwater, such as a pumping cap or tax, are more cost-effective for society with a lower cost of MAR water.

【 授权许可】

Free