This research is aimed at determining suitable areas within Akure metropolis with residual soils of excellent geotechnical properties as landfill liners and with considerable depth to groundwater table, along with other environmental factors, for siting municipal solid waste dumpsite. Field work, soil sampling, and laboratory geotechnical tests were carried out based on standards outlined in British Standards, BS 1377. The suitability of geotechnical parameters was evaluated using existing standards described in previous research works. The geotechnical conditions, along with lithologic, hydrologic, topographic, and land-use conditions, of the study area were allotted weightages, and respective maps were produced using fuzzy membership approach. The coefficient of permeability, plasticity index, fines percentage, and maximum dry density (MDD) values ranged from 2.66 × 10^–9 to 3.99 × 10^–3, 0 to 34.9%, 4.3 to 78.8%, and 1432 to 2113 kg/m³ respectively. Based upon the evaluation of the derived geotechnical parameters, about 307 km² of the study area (over 90% of the soils sampled) is highly suitable for landfill consideration. Based on the sites’ lithological conditions, the charnockite-derived soils are most suitable for landfill consideration. The land-use/land-cover criteria indicated that areas covered with dense vegetation, cropland, grassland, and/or derived savanna cover an area of about 188 km² and are rated most suitable for landfill. Based on topography, distance to drainage, and depth to groundwater table criteria, an average of about 78 km² of the land mass of Akure is rated averagely to very suitable. Based on the overlay of all the fuzzy members used as criteria, of the total land area of about 335 km² which Akure metropolis occupies, an area of 31.7 km² (9.5%) is most suitable and 133.73 km² (39.9%) is averagely suitable, while 169.73 km² (50.6%) is considered not suitable for siting solid waste landfill. This study ascertained that the integration of geotechnical, lithological, hydrological, and topographical factors, as well as land-use criteria, are important in the selection of appropriate municipal solid waste landfill sites with minimal environmental contamination potential or threat. It further proves that GIS is a genuine tool for making decisions regarding the planning, designing, and development of urban areas.

中文翻译：

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市政固体垃圾填埋场的选择：一种基于岩土和地球环境的地理空间方法

这项研究旨在确定阿库雷（Akure）大都市内合适的区域，这些区域具有出色的岩土特性的土壤作为垃圾填埋场衬里，并具有相当的地下水位深度，以及其他环境因素，可用于选址城市固体垃圾场。根据英国标准BS 1377中概述的标准进行了野外工作，土壤采样和实验室岩土工程测试。岩土工程参数的适用性使用先前研究工作中描述的现有标准进行了评估。分配研究区域的岩土条件，岩性，水文，地形和土地使用条件的权重，并使用模糊隶属度法制作相应的地图。渗透系数，可塑性指数，细粉百分比，^–9至3.99×10 ^–3，0至34.9％，4.3至78.8％和1432至2113 kg / m ³。根据对导出的岩土参数的评估，大约307 km ²的研究区域（超过90％的采样土壤）非常适合填埋场。根据现场的岩性条件，夏洛石来源的土壤最适合填埋。土地利用/土地覆盖标准表明，茂密的植被，农田，草地和/或衍生的稀树草原覆盖的区域覆盖约188 km ²的面积，被评为最适合填埋场。根据地形，到排水的距离以及到地下水位的深度标准，平均约78 km ²平均对阿库雷（Akure）土地的评估非常合适。根据所有模糊成员的覆盖率，Akure大都市所占的总土地面积约为335 km ²，最适合的面积为31.7 km ²（9.5％），最适合的面积为133.73 km ²（39.9％）。平均合适，而169.73 km ²（50.6％）被认为不适用于固体废物填埋场。这项研究确定了岩土，岩性，水文和地形因素以及土地使用标准的综合对于选择环境污染可能性或威胁最小的适当的城市固体垃圾填埋场至关重要。它进一步证明了GIS是用于做出有关城市规划，设计和开发的决策的真正工具。