Effect of water spreading on aquifer recharge using GRI, SDI and SPI indicators (Case study: Herat aquifer, Yazd)

Document Type : Research Paper

Authors

1 PhD of Watershed Management, Department of Natural Resources and Watershed Management of Yazd

2 Associate Professor, Department of Natural Resources and the Desert studies, Yazd University

3 Professor of Natural Resources and the Desert studies, Yazd University

4 Faculty Member of Agriculture and Natural Resources Research Center of Yazd

10.29252/aridbiom.7.1.95

Abstract

Flood Spreading on alluvial fans at outlet catchment areas used with the aim of exploiting the floods. It is appropriated method of operation of the seasonal floods of rivers and streams and store them in aquifers. In present research, the impact of flood spreading in recharge aquifer in Herat was studied. For this reason, GRI indicators for piezometers wells (3 wells in the aquifer and around aquifer 6 wells) and SDI index for Qanat downstream (4 Qanats) were calculated. Correlations measured between volume of flood water and Standardized Precipitation Index (SPI) as well as the annual and monthly and were tested with different time delays. The results showed that the correlations between annual GRI index in piezometers with volume of flood and flood volume with long delays at levels 1 and 5% is significant. GRI index monthly in 2 piezometer with flood volumes and in the rest with the Monthly SPI index was significant. The Qanats SDI index with monthly and annual SPI correlates with long delays. Finally, given that 98 percent dewatering occurred in the first three years and for many years has been the area without dewatering, Also, due to reduced permeability and high evaporation, the design of such projects in arid and semiarid areas of low performance is outstanding.

Keywords

References

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Journal of Arid Biome
Volume 7, Issue 1
November 2017
Pages 95-107

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