通过卫星图像历史分析与电阻率层析成像相结合确定埃及东开罗地区一个地下采石场的特征

IF 1.9 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Ahmed Lethy, Usama Massoud, Hany Mesbah, Abbas Mohamed Abbas, Said M. Said
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引用次数: 0

摘要

东开罗的许多采石场都被用作固体废物填埋场。由于新开罗的城市发展,现在已无法从地表找到这些地点。在本研究中,利用电阻率层析成像(ERT)数据和多时相高分辨率卫星图像,发现并划定了埃及开罗东环路附近的一个地下垃圾填埋场。根据卫星图像上显示的变化分析,截至 2005 年,研究地点是一个西偏北方向的采石场,被各种固体材料随机填充。根据变化探测数据,进行了 ERT 勘测规划。ERT 测量确定了平面图上被填充材料占据的导电区,并将其与代表天然土壤区域的电阻区分开。结合卫星图像和 ERT 测量结果,可以区分出两个不同的地质电学单元:单元-2(下部单元)的电阻率值较高,是原始土壤(基岩)的特征,而单元-1(上部单元)的电阻率值较低至中等,是固体废弃物的特征。基岩与填充材料之间的接触点是利用间距较近的 ERT 剖面网格和详尽的地形图绘制和划定的。地表高程、1 号单元下边界的深度以及该单元在整个研究地点的厚度变化,都是可用于描述相关单元(1 号单元)特征的一些标准。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Characterization of a Buried Quarry by Historical Analysis of Satellite Images Integrated with Electrical Resistivity Tomography, East Cairo area, Egypt

Characterization of a Buried Quarry by Historical Analysis of Satellite Images Integrated with Electrical Resistivity Tomography, East Cairo area, Egypt

Many quarries in East Cairo are used as solid waste landfills. These locations are now impossible to find from the ground surface due to the urban development of New Cairo. In this study, a subterranean landfill site near the Ring Road in East Cairo, Egypt, was found and delineated using electrical resistivity tomography (ERT) data and multi-temporal high-resolution satellite imagery. Up to 2005, the research location was a WNW-oriented quarry that had been randomly filled with diverse solid materials, according to an analysis of changes shown on the satellite images. Based on the change detection data, ERT survey planning was done. The ERT measurements identified the infill material-occupied electrically conductive zones on the plan view and separated them from the resistive zones, representing the natural soil areas. Two distinct geoelectrical units could be distinguished by combining the satellite images and the ERT results: Unit-2 (the lower unit) is characterized by high resistivity values that characterize the original soil (bedrock), whereas Unit-1 (the upper unit) is defined by low to moderate resistivity values that are the solid waste materials. The contact between the bedrock and the infill materials was mapped and delineated using the closely spaced grid of ERT profiles and the thorough topographic map. Ground surface elevation, the depth of Unit 1’s lower boundary, and this unit’s thickness change throughout the researched site are some criteria that might be addressed and used to characterize the unit of interest (Unit 1).

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来源期刊
pure and applied geophysics
pure and applied geophysics 地学-地球化学与地球物理
CiteScore
4.20
自引率
5.00%
发文量
240
审稿时长
9.8 months
期刊介绍: pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.
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