Groundwater rejuvenation in parts of India influenced by water-policy change implementation.

Groundwater rejuvenation in parts of India influenced by water-policy change implementation.
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DOI:
10.1038/s41598-017-07058-2
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发表时间:
2017-08-07
期刊:
影响因子:
4.6
通讯作者:
Famiglietti JS
Famiglietti JS
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bhanja SN;Mukherjee A;Rodell M;Wada Y;Chattopadhyay S;Velicogna I;Pangaluru K;Famiglietti JS

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印度的地下水资源日益减少,支撑着全球近五分之一的人口,也是最大的地下水用户,近年来引起了人们的极大关注。然而,与有充分记录的由于快速和无管理的地下水提取而导致的印度地下水枯竭相反,在这里,我们首次报告了通过长期(1996-2014年,使用超过19000个观测点)现场和十年(2003-2014年)在印度西部和南部地区进行的基于卫星的地下水储存测量的区域尺度地下水储存(GWS)补给。在印度西部和南部部分地区,原地GWS (GWSobs)一直以- 5.81±0.38 km3/年(1996-2001年)和- 0.92±0.12 km3/年(1996-2002年)的速率下降,并分别以2.04±0.20 km3/年(2002-2014年)和0.76±0.08 km3/年(2003-2014年)的速率恢复。本文通过对印度西部和南部地下水管理政策变化对地下水储量影响的统计分析和模拟结果表明,印度地下水提取和可持续水资源利用管理政策的范式转变似乎已经开始补充印度西部和南部的含水层。
The dwindling groundwater resource of India, supporting almost one fifth of the global population and also the largest groundwater user, has been of great concern in recent years. However, in contrary to the well documented Indian groundwater depletion due to rapid and unmanaged groundwater withdrawal, here for the first time, we report regional-scale groundwater storage (GWS) replenishment through long-term (1996–2014, using more than 19000 observation locations) in situ and decadal (2003–2014) satellite-based groundwater storage measurements in western and southern parts of India. In parts of western and southern India, in situ GWS (GWSobs) has been decreasing at the rate of −5.81 ± 0.38 km3/year (in 1996–2001) and −0.92 ± 0.12 km3/year (in 1996–2002), and reversed to replenish at the rate of 2.04 ± 0.20 km3/year (in 2002–2014) and 0.76 ± 0.08 km3/year (in 2003–2014), respectively. Here, using statistical analyses and simulation results of groundwater management policy change effect on groundwater storage in western and southern India, we show that paradigm shift in Indian groundwater withdrawal and management policies for sustainable water utilization appear to have started replenishing the aquifers in western and southern parts of India.
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