Ecology, Environment and Conservation Paper

Vol 21, Issue 4, 2015; Page No.(1749-1756)

IMPACT OF RAINFALL VARIABILITY ON WATER RESOURCES OF CHHATTISGARH STATE WITH SPECIAL REFERENCE OF MANNKENDALL TEST STATISTICS ON THE CONTEXT OF CLIMATE CHANGE

Abhishek Danodia and A.S.R.A.S. Sastri

Abstract

Indian monsoon rainfall changes due to regional climate changes are expected to result in severe droughts and intense flooding in many parts. Alterations in water resources may affect human health, forests, land, wildlife and agriculture. In this paper, Thornthwaite and Mather revised climatic water balance model (1955) have slightly modified with some assumption. The analysis was done by using standard deviation, Coefficient of variation, regression analysis, trend analysis, Mann- Kendall test and depletion trend. A significant finding is observed that ground water was depleted with a highest amount at Mahasamund, Raigarh, Ambikapur at the rate of 4961 m3/ha, 3740 m3/ha, 3421 m3/ha in last 110 year, respectively and surface water was depleted with a highest amount at Mahasamund, Raigarh, Ambikapur at the rate of 2167 m3/ha, 1540 m3/ha, 1375 m3/ha in last 110 year, respectively. These decreasing trend was retrieved by Mann- Kendall test statistics and found that water resources are in decreasing trend in most of the districts with highly significant (รก=1%) results. Most of the districts of the state affected with the problem of depletion of water resources because of unpredictable rainfall events, rainfall variability, drought and fluctuating rainfall pattern. So, an inventory analysis and appropriate strategic planning must discussed for better consumptive use of water resources for human as well as plant in the era of climate change.

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