Journal Paper

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Journal: IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH | Year:1394 | Volume:22 | Issue:4 | Start Page:711 | End Page:720

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Title

Analysis of spatial and temporal trends of groundwater index (GRI) (Case study: Yazd-Ardakan plain)

Pages

 Start Page 711 | End Page 720

Abstract

Yazd-Ardakan Plain has been faced with significant reduction of groundwater level in recent years. Therefore, it is expected that studying hydro-geological drought can help the right management of this aquifer. Groundwater Resources Index was used to study hydro-geological drought in Yazd-Ardakan Plain. At first, 30 piezometric wells with the same 10-year period (2002-2012) were selected. Then, the zonation maps of annual groundwater level, average groundwater level, and standard deviation were provided by ArcGIS9. 3. Finally, GRI map was provided using these maps and GRI relation. According to the obtained results, the most serious annual hydro-geological drought occurred in 2011 with an average GRI of 0. 79. According to the GRI zonation map, hydro-geological drought severity is high in northern and southern parts of the study area. It can be due to concentration of population, industrial centers, and excessive harvesting of groundwater in these areas. In addition, the GRI temporal changes indicate the deterioration of Yazd-Ardakan aquifer.

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