Research on the regulation of rain infiltration in the Sanzhouxi landslide based on HYDRUS
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摘要: 以三舟溪滑坡为例，运用HYDRUS-1D模拟软件，对由于降雨影响造成滑坡土壤不饱和区的土壤水运动进行模拟计算，为滑坡体降雨入渗规律研究提供参考依据。将模拟计算结果与实际监测结果进行对比，发现在考虑降雨影响下，评价滑坡体降雨入渗规律采用Hydrus-1D是可靠的。受降雨特征和初始含水率的影响，降雨对地下水位的影响存在滞后作用，5月25日和5月29日降雨期间，湿润锋到达模型底部所用的时间分别为 6 h、19.2 h。Abstract: Previous researches have shown that the evaluation of the landslide induced by rainfall is accurate or not, depending on the ability of how to describe the process of the rainfall infiltration. The modeling calculation of the unsaturated zone in the Sanzhouxi landslide induced by the rainfall are carried out by using HYDURS-1D. The simulation results are compared with the actual monitoring results. The results show that the evaluation of the regulation of the landslide by using Hydrus-1D is reliable. The lag time of rainfall penetration recharge to groundwater is influenced by the rainfall characteristics and the initial water contents. On May 25th and May 29th, it spent 6 h and 19.2 h respectively for the wetting front to arrive to the bottom of the model. The results of the actual case can help us grasp accurately the rainfall infiltration of the landslide. They are of great significance in the evaluation of the stability of landslides under the condition of rainfall.
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Key words:
- rainfall /
- HYDRUS /
- infiltration /
- rainfall penetration recharge
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