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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Groundwater dynamics in North Bihar plains
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Groundwater dynamics in North Bihar plains

机译：北比尔平原地下水动态

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The plains of north Bihar, drained by numerous rivers originating in the Himalayas also experience a reasonably high rainfall of -1200 mm per year. Still, more than 80% of the irrigation demand in this region is met by groundwater resources. Also, the increasing population and industrialization are likely to lead to overexploitation of groundwater as in several other states of northwest India over the last 4-5 decades. This article aims to assess the groundwater dynamics in the plains of north Bihar using 30 years (19832013) of groundwater level data to understand the spatial and temporal, pre- and post-monsoon characteristics using Geographical Information System (GIS) and ordinary kriging (interpolation technique) method. Groundwater storage change was estimated using the water table fluctuation method. Our analysis shows 2-3 m decline in groundwater level in several districts such as Begusarai, Bhagalpur, Samastipur, Katihar and Purnea in both pre- and post-monsoon periods in the last decade (2004-2013). Similar trends were observed in groundwater storage for Samastipur and Purnea districts; the maximum reductions in groundwater storage for the pre-monsoon period are computed as 636 MCM and 631 MCM respectively, and the values for the post-monsoon period are 289 MCM and 216 MCM respectively. Such large scale depletion in groundwater storage in such a short time span is alarming. If this trend continues unabated, it may lead to serious scarcity of water resources in this region, negatively impacting agricultural productivity and food security.
机译：北毕哈尔的平原，由源于喜马拉雅山的众多河流排出，每年也经历了相当高的降雨量-1200毫米。仍然，地下水资源满足该地区灌溉需求的80％以上。此外，人口和产业化的增加可能导致地下水的过度开采，与过去4-5十年的西北地区的其他几个国家一样。本文旨在使用30年（19832013）的地下水位数据评估北比尔平原地下水动态，以了解使用地理信息系统（GIS）和普通克里格（插值技术）方法。利用水台波动法估算地下水储存变化。我们的分析显示，在过去十年（2004-2013）的前后和季风期间，若干地区的地下水位下降2-3米下跌2-3米地下水位下降。在Samastipur和Purnea地区的地下水储存中观察到类似的趋势;预季度期间地下水存储的最大减少分别计算为636MCM和631Mcm，分别为季风期的值分别为289 mcm和216mcm。在这种短时间跨度的地下水储存中如此大规模耗尽是惊人的。如果这一趋势持续不减，可能导致该地区的水资源严重稀缺，对农业生产力和粮食安全产生负面影响。

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