The rise of groundwater level in slope due to intense rainfall is one of the factors that can trigger slope failure. The groundwater level rise causes increase in the pore water pressure thus reducing the shear resistance of the soil. The purpose of this study is to present a groundwater level evaluation system in response to daily rainfall for slope stability forecasting. The system consists of three important components namely the conceptual multi tank model, unsaturated-saturated seepage flow analysis and stability analysis. The conceptual multi tank model was initially used to determine the fluctuations of groundwater level followed by the unsaturated-saturated seepage flow analysis to determine the pore water pressure distribution in the slope. Finally, the variation in factor of safety for the slope was determined by stability analysis corresponding to the seepage flow results. The performance of the evaluation system was demonstrated using a case study in Putrajaya, Malaysia. From this study, an early warning system can be developed for slope stability which is essential for disaster prevention during rainfall.

中文翻译：

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降雨作用下边坡稳定性预测地下水位波动响应系统的研制

强降雨导致边坡地下水位上升是引发边坡失稳的因素之一。地下水位上升导致孔隙水压力增加，从而降低土壤的剪切阻力。本研究的目的是提出一个地下水位评估系统，以响应日降雨量，用于边坡稳定性预测。该系统由三个重要组成部分组成，即概念性多罐模型、非饱和-饱和渗流分析和稳定性分析。概念性多罐模型最初用于确定地下水位的波动，然后是非饱和饱和渗流分析，以确定斜坡中的孔隙水压力分布。最后，边坡安全系数的变化由与渗流结果相对应的稳定性分析确定。评估系统的性能通过在马来西亚布城进行的案例研究得到证明。根据这项研究，可以开发一个斜坡稳定性预警系统，这对于降雨期间的灾害预防至关重要。