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首页> 外文期刊>Environmental earth sciences >Numerical simulation of groundwater flow and aquifer-system compaction using simulation and InSAR technique: Saveh basin, Iran
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Numerical simulation of groundwater flow and aquifer-system compaction using simulation and InSAR technique: Saveh basin, Iran

机译：使用模拟和InSAR技术对地下水流和含水层系统进行压实的数值模拟：伊朗萨夫斯盆地

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In this research, a multidisciplinary approach has been presented to evaluate land subsidence due to heavy groundwater withdrawal. Land subsidence in aquifers with complex stratigraphy was predicted using the Terzaghi's 1D instantaneous compaction principle and was incorporated into a 3D groundwater flow model (MOD-FLOW). The integrated model was then calibrated for Saveh aquifer located in Iran to simulate observed hydraulic heads and compaction. In order to control the model results, interferometric synthetic aperture radar (InSAR), a generated 3D geological model, monitoring wells, and available literature were used to predict land subsidence in Saveh aquifer and apply the results in the developed model. The results showed that the InSAR, extensometers, and numerical simulations closely agree in predicting the land subsidence. The simulation results show that the regional subsidence began in the mid-1990s and that the area has experienced up to 70 cm of subsidence, where heavy pumping and thick clay layers are found. The calibrated model indicates that if the pumping rate remains at the current level, the subsidence will reach as high as 170 cm over the next 5 years. The results show that the proposed approach which integrates various sources of data is useful in estimating land subsidence, especially in areas where field measurements are scarce and satellite radar images are available.
机译：在这项研究中，提出了一种多学科方法来评估由于大量地下水抽取而引起的地面沉降。使用Terzaghi的一维瞬时压实原理预测了具有复杂地层的含水层中的地面沉降，并将其纳入3D地下水流模型（MOD-FLOW）。然后针对位于伊朗的Saveh含水层对集成模型进行校准，以模拟观察到的水头和压实。为了控制模型结果，使用干涉合成孔径雷达（InSAR），生成的3D地质模型，监测井以及可用的文献来预测Saveh含水层中的地面沉降并将结果应用于开发的模型中。结果表明，InSAR，引伸计和数值模拟在预测地面沉降方面非常吻合。模拟结果表明，该区域的沉降始于1990年代中期，该区域经历了长达70 cm的沉降，发现了厚重的泵吸作用和厚厚的粘土层。校准后的模型表明，如果抽水率保持在当前水平，那么在接下来的5年中沉降将达到170 cm。结果表明，所提出的方法综合了各种数据源，可用于估算地面沉降，尤其是在野外测量稀少且有卫星雷达图像可用的地区。

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