当前位置: X-MOL 学术Environ. Monit. Assess. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Development of potential map for groundwater abstraction in the northwest region of Bangladesh using RS-GIS-based weighted overlay analysis and water-table-fluctuation technique
Environmental Monitoring and Assessment ( IF 3 ) Pub Date : 2021-01-03 , DOI: 10.1007/s10661-020-08790-5
Sara Nowreen , Imran Hossain Newton , Rashed Uz Zzaman , A. K. M. Saiful Islam , G. M. Tarekul Islam , Md. Saiful Alam

The increasing trend of population growth along with the rapid groundwater-based agricultural expansion and decreasing trend of mean annual rainfall in the Northwest region of Bangladesh has been exacerbating the declination of groundwater for further expansion. Therefore, the present study attempts to demarcate the potential groundwater abstraction zones from the assessment of potential recharge and available recharge. Potential recharge was obtained with commonly used geospatial-based weighted linear combination (WLC) technique. Here, WLC analysis was based on eight factors related to physiographic (e.g. drainage density, lineament density, slope), geomorphologic (e.g. geomorphology, lithology, soil), land use and land cover (LULC) and hydrology (i.e. rainfall). Available net recharge was assessed for the period 1993–2017 by employing the water table fluctuation method. Finally, the resultant map on potential abstraction was characterized into five different classes, viz. ‘very low’, ‘low’, ‘moderate’, ‘high’ and ‘very high’. The derived map reveals that ‘very high’ potential zone is distributed along the Teesta river floodplain, especially the northeastern part. In contrast, the Barind Tract (i.e. the southwestern and the southcentral parts) area shows ‘very low’ groundwater prospect. Such fused interpretations are expected to contribute to the planning of integrated management of water resources.



中文翻译:

使用基于RS-GIS的加权叠加分析和水位波动技术开发孟加拉国西北地区地下水开采潜力图

孟加拉国西北地区人口的增长趋势,以地下水为基础的农业迅速增长,以及年均降雨量的下降趋势,加剧了地下水进一步扩展的趋势。因此,本研究试图从潜在补给和可用补给的评估中划定潜在的地下水提取区。使用常用的基于地理空间的加权线性组合(WLC)技术可获得电势补给。在这里,WLC分析基于与地形(例如排水密度,线粒密度,坡度),地貌(例如地貌,岩性,土壤),土地利用和土地覆盖(LULC)以及水文(即降雨)相关的八个因素。通过采用地下水位波动法评估了1993年至2017年期间的可用净补给量。最终,关于潜在抽象的结果图被分为五个不同的类别。“非常低”,“低”,“中等”,“高”和“非常高”。得出的地图显示,“非常高”的潜在地带分布在Teesta河的洪泛区,尤其是东北部。相反,Barind Tract(即西南和中南部地区)地区的地下水前景非常低落。预计这种融合的解释将有助于水资源综合管理的规划。得出的地图显示,“非常高”的潜在地带分布在Teesta河的洪泛区,尤其是东北部。相反,Barind Tract(即西南和中南部地区)地区的地下水前景非常低落。预计这种融合的解释将有助于水资源综合管理的规划。得出的地图显示,“非常高”的潜在地带分布在Teesta河的洪泛区,尤其是东北部。相反,Barind Tract(即西南和中南部地区)地区的地下水前景非常低落。预计这种融合的解释将有助于水资源综合管理的规划。

更新日期:2021-01-03
down
wechat
bug