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首页> 外文期刊>Environmental Geology >Delineation of groundwater recharge zones and identification of artificial recharge sites in West Medinipur district, West Bengal, using RS, GIS and MCDM techniques
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Delineation of groundwater recharge zones and identification of artificial recharge sites in West Medinipur district, West Bengal, using RS, GIS and MCDM techniques

机译：使用RS，GIS和MCDM技术描绘西孟加拉邦西Medinipur区的地下水补给区并确定人工补给点

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摘要

Artificial recharge plays a pivotal role in the sustainable management of groundwater resources. This study proposes a methodology to delineate artificial recharge zones as well as to identify favorable artificial recharge sites using integrated remote sensing (RS), geographical information system (GIS) and multi-criteria decision making (MCDM) techniques for augmenting groundwater resources in the West Medinipur district of West Bengal, India, which has been facing water shortage problems for the past few years. The thematic layers considered in this study are: geomorphology, geology, drainage density, slope and aquifer transmissivity, which were prepared using IRS-ID imagery and conventional data. Different themes and their corresponding features were assigned proper weights based on their relative contribution to groundwater recharge in the area, and normalized weights were computed using the Saaty's analytic hierarchy process (AHP). These thematic layers were then integrated in the GIS environment to delineate artificial recharge zones in the study area. The artificial recharge map thus obtained divided the study area into three zones, viz., 'suitable,' 'moderately suitable' and 'unsuitable' according to their suitability for artificialrngroundwater recharge. It was found that about 46% of the study area falls under 'suitable' zone, whereas 43% falls under the 'moderately suitable' zone. The western portion of the study area was found to be unsuitable for artificial recharge. The artificial recharge zone map of the study area was found to be in agreement with the map of mean groundwater depths over the area. Furthermore, forty possible sites for artificial recharge were also identified using RS and GIS techniques. Based on the available field information, check dams are suggested as promising artificial recharge structures. The results of this study could be used to formulate an efficient groundwater management plan for the study area so as to ensure sustainable utilization of scarce groundwater resources.
机译：人工补给在地下水资源的可持续管理中起着关键作用。这项研究提出了一种方法，用于划定人工补给区，并使用综合遥感（RS），地理信息系统（GIS）和多标准决策（MCDM）技术来确定有利的人工补给地点，以增加西部的地下水资源印度西孟加拉邦的Medinipur区在过去几年中一直面临缺水问题。本研究中考虑的主题层是：地貌，地质，排水密度，坡度和含水层透射率，这些是使用IRS-ID图像和常规数据准备的。根据不同主题及其相应特征对该地区地下水补给的相对贡献，为其分配适当的权重，并使用Saaty的层次分析法（AHP）计算归一化的权重。然后将这些主题层集成到GIS环境中，以描绘研究区域中的人工补给区。如此获得的人工补给图根据研究区域对人工地下水补给的适用性将研究区域划分为三个区域，即“合适”，“中等合适”和“不合适”。研究发现，约46％的研究区域属于“适当”区域，而43％属于“中等适当”区域。发现研究区域的西部不适合人工补给。研究区的人工补给区图与该地区的平均地下水深度图一致。此外，还使用RS和GIS技术确定了40个可能的人工补给地点。根据现有的现场信息，建议将止水坝作为有前途的人工补给结构。研究结果可用于制定研究区域的有效地下水管理计划，以确保稀缺地下水资源的可持续利用。

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