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首页> 外文期刊>Journal of water resource and protection >A 2D GIS Approach for Mapping Aquiferous Zones Using Remotely Sensed Data within Obubra, Southeast-Nigeria
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A 2D GIS Approach for Mapping Aquiferous Zones Using Remotely Sensed Data within Obubra, Southeast-Nigeria

机译：用于在Obubra，Southeast-Nigeria内使用远程感测数据来映射半地区GIS方法

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摘要

Groundwater is vital to the sustenance and well-being of man-kind, although it is constantly under immense pressure. For this reason, there is need to develop an effective, reliable, scientific and sustainable means of delineating zones of groundwater occurrence and distribution with high precision in other to effectively explore for this resource. In this study, remote sensing (RS) and geographical information system (GIS) have been combined to develop thematic maps of the zones of groundwater occurrence and distribution based on variable factors such as; elevation, drainage, lineament, slope, litholo-gy and soil. The analytical hierarchy procedure (AHP) was employed to classify and subsequently assign weight to each variable factor through weighted overlay analysis. Integration of these factors with their relative classes defined was used to produce a 2D-model for predicting surface aquifers mapped within Obubra. The study delineated three (3) surface aquifer zones representing groundwater potential zones. Zones representing high groundwater potential cover an area of approximately 331.94 Km~2, accounting for 29.58% of the study area. The region that represents moderate to good groundwater occurrence and distribution covers an estimated area of approximately 648.42 Km~2, occupying 57.78% of the study area. Zones with groundwater of low potential account for a total surface area of approximately 141.81 Km~2 which is about 12.64% of the entire study area. Regions that show good to moderate and high groundwater potentials, have a wider distribution all across the study area except at the southernmost part. The study therefore shows that it is effective in delineating surface potential zones and hitherto a 2D surface aquifer model for groundwater exploration campaigns within Obubra and its environs.
机译：地下水对人类的寄托和福祉至关重要，尽管它不断受到巨大的压力。因此，有必要开发一种有效，可靠，科学和可持续的划定地下水发生区域和分布区，以高精度地划分，以有效地探索这种资源。在本研究中，已经组合了遥感（RS）和地理信息系统（GIS）以基于诸如的可变因素开发地下水发生区域的主题地图。海拔，排水，线身，坡，岩石 - GY和土壤。使用分析层次结构（AHP）来通过加权覆盖分析对每个变量因子分类并随后分配权重。使用定义的相对类别的这些因素的集成用于生产用于预测映射在Obubra内的表面含水层的2D模型。该研究描绘了三（3）个表面含水层，代表地下水潜在区域。代表高地下水潜力的区域覆盖约331.94公里〜2的区域，占研究区域的29.58％。代表中等至良好地下水发生和分配的地区占估计大约648.42公里〜2的区域，占研究区域的57.78％。具有低潜在地点的地表面积为约141.81 km〜2的区域，约为整个研究区域的12.64％。良好的中度和高地下水潜力的地区，除了最南端的部分外，所有研究区都有更广泛的分布。因此，研究表明，它在划清表面潜在区域和迄今为止Obubra及其环境中的地下水勘探活动的2D表面含水层模型是有效的。

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