Volume 18, Issue 2 (2014)
MJSP 2014, 18(2): 57-80 |
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khorani A, khajeh M. An Investigation on the coincidence between trend of drought and groundwater levels decline
(A Case Study: Plain of Darab). MJSP 2014; 18 (2) :57-80
URL: http://hsmsp.modares.ac.ir/article-21-4412-en.html
URL: http://hsmsp.modares.ac.ir/article-21-4412-en.html
Abstract: (10079 Views)
Underground water is an important source for drinking and agriculture in the worlds. Due to Extraction of these resources and too frequent droughts in recent years the level of resources has been a significant drop. The aim of this study was to investigate the impact of drought on groundwater levels and estimate the time lag of drought in Plain of Darab. To do this, using rainfall data of Darb ghale darab Station and climate index SPI was extracted conditions of drought. And trend by using the Mann - Kendall non-parametric test was analysis. Then hydrograph of ground water level from 71 to 89 years by using the arithmetic mean of 42 wells was plotted. Finally, by using Mann - Kendall test, trend of 19-year ground water level data of the study area was given analysis. The results indicate that the region Experience of drought during this time and rainfall has been decreased. Analysis of 42 wells showed that the decline in groundwater levels in 40 wells has increased and two other wells, one of them had fixed trend, and other has been reduced in the drop rate. And results of correlation in precipitation data and drop in Groundwater Level showed that the decline in groundwater levels than precipitation occurs with 5 months lag.
Received: 2013/12/6 | Accepted: 2014/04/12 | Published: 2014/07/23
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