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Effect of flood spreading on the quality and quantity of groundwater oscillation at Tokahour– Hashtbandi Plain- South of Iran
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Ferial Abshiri    , Ommolbanin Bazrafshan * , Mehdi Biniaz |
| Professor, Department of Natural Resources, Faculty of Agriculture and Natural Resources, University of Hormozgan, Bandar Abbas, Iran, Email: o.bazrafshan@hormozgan.ac.ir |
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Abstract: (895 Views) |
| This research aims to investigate the effect of flood spreading on the quantity and quality of groundwater in the Tokahour-Hashtbandi plain. For this purpose, first, SPI was calculated in time scales of 1 to 48 months for the existing rain gauge station in the region. The GRI index was calculated using the groundwater level data in the next step. Then, three wells with conventional names A1 to A3 were selected to evaluate quantitative changes. Five wells B1 to B5 were also selected for qualitative evaluation as they had the closest position to the flood spreading area. Then, using the Petit test, the time of the flood's impact on the quantitative and qualitative resources was determined. Also, by dividing the statistical period into two parts, the time before the impact of flood spreading and after the impact of flood spreading, using linear regression analysis, the slope of changes of GRI, EC, and SAR index for both times was done for the selected wells. In the next step, using correlation analysis and linear analysis, the effect of flood spreading on the sensitivity of groundwater resources to drought was evaluated. The results showed that the time of flood spreading effect on the level of three wells A1, A2, and A3 is 2009, 2009, and 2012, respectively, which is not statistically significant. Also, the time of flood spreading effect on EC values of wells B1, B2, B3, and B5 in 2007, 2009, 2013, and 2009 respectively, and on SAR values of well B1 in 2010 was determined. The results of the evaluation of the effect of flood spreading on the quantity of groundwater show the improvement of all three selected wells and the reduction of the slope of EC changes, but it did not have much effect on SAR. The results of the evaluation of the effect of flood spreading on the sensitivity of the groundwater quantity to drought showed that the flood spread has reduced the sensitivity of the GRI and EC index to drought in the selected wells, but it has not been able to reduce the sensitivity of SAR to drought. |
Article number: 1 |
| Keywords: Water spreading, Groundwater Drought, Petit test |
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Full-Text [PDF 2318 kb]
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Type of Study: Research |
Subject:
General
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