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首页> 外文期刊>International Journal of Geomatics and Geosciences >Integrating GIS and remote sensing in environment impact assessment of Ewaso Nyiro Mega dam in Kenya
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Integrating GIS and remote sensing in environment impact assessment of Ewaso Nyiro Mega dam in Kenya

机译：将GIS和遥感技术集成到肯尼亚Ewaso Nyiro巨型水坝的环境影响评估中

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GIS is increasingly being used worldwide within Environmental Impact Assessment (EIA); However, the extent has not been well documented and therefore not well appreciated in the scientific fraternity. In this case study the National Water Conservation and Pipeline Corporation (NWCPC) on behalf of the Kenyan government engaged a consultant to identify a suitable site for a mega dam to supply water to the proposed Isiolo resort city. The consultant decision in siting the dam was not based on a comprehensive scientific analysis, as required of such a project. This could be one of the many other projects being implemented in the wrong premise courtesy of politics, and influence of leaders. The objective of this study was to review the E.I.A process carried out by the consultant to determine whether any scientific technique was employed on the identification of the ideal site for the dam. The Ewaso Nyiro basin was identified and the relevant data on dam siting collected and processed. Spatial analysis was used to inform the location of the dam based on weights realized through the Analytical Hierarchical Process (AHP). The analysis realized three suitable dam sites that were further subjected to analysis based on the local conditions to finally settle at the most suitable site for the Mega-Dam. The site slightly differs from the one fronted by the consultant in terms of capacity, inundation area, and dam crest length. The study has revealed that the most ideal site was within vicinity to the site identified by the contractor. Decisions taken regarding the length of the dam wall were noted to be misleading since no scientific approach was adopted. There is danger of implementing very noble, gigantic and capital intensive projects in the wrong premise when wrong decisions are made based on unscientific means.
机译：GIS在全球环境影响评估（EIA）中得到越来越多的使用;但是，程度尚未得到充分记录，因此在科学博爱中并未得到充分了解。在本案例研究中，国家水利保护和管道公司（NWCPC）代表肯尼亚政府聘请了一名顾问，为大型水坝确定合适的地点向拟建的Isiolo度假城市供水。大坝选址的顾问决定并非基于该项目要求的全面科学分析。这可能是在错误的前提下（由于政治原因和领导人的影响）实施的许多其他项目之一。这项研究的目的是审查顾问进行的E.I.过程，以确定在确定大坝的理想地点时是否采用了任何科学技术。确定了Ewaso Nyiro盆地，并收集和处理了有关大坝选址的相关数据。根据通过层次分析法（AHP）实现的权重，使用空间分析来告知大坝的位置。分析实现了三个合适的坝址，并根据当地情况进一步进行了分析，最终定居在最适合大坝的位置。在容量，淹没面积和坝顶长度方面，该地点与顾问所面对的地点略有不同。研究表明，最理想的地点是在承包商确定的地点附近。由于未采取科学方法，因此关于坝壁长度的决定被认为具有误导性。如果基于不科学的手段做出错误的决定，则有可能在错误的前提下实施非常高贵，庞大且耗资巨大的项目。

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