| 降雨型滑坡预报中计算前期有效降雨量的一种新方法 |
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| 引用本文： | 李长江,麻土华,孙乐玲,朱兴盛.降雨型滑坡预报中计算前期有效降雨量的一种新方法[J].山地学报,2011,29(1). |
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| 作者姓名： | 李长江 麻土华 孙乐玲 朱兴盛 |
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| 作者单位： | 1. 浙江省国土资源厅信息中心,浙江杭州,310007
2. 浙江省国土资源厅地质环境处,浙江杭州,310007 |
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| 摘 要： | 在许多地区,前期降雨条件对滑坡的发生有重大影响,前期有效降雨量是滑坡预报的一个重要参数。基于累积滑坡频度-降雨量分形关系导出了一种新的计算前期有效降雨量的方法。在这个方法中,降雨衰减系数是由给定区域内引发滑坡的累积降雨阀值随观测时段天数变化的标度指数所决定,滑坡前每天降雨对总有效雨量的贡献并非是独立的,前i天降雨的衰减过程与前i-1天的降雨相关联。
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| 关 键 词： | 降雨型滑坡 预报 前期降雨量 有效降雨量 分形 |
A New Approach to Calibrate Antecedent Precipitation for Rainfall-triggering Landslide Forecast |
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| LI Changjiang,MA Tuhua,SUN Leling,ZHU Xinsheng.A New Approach to Calibrate Antecedent Precipitation for Rainfall-triggering Landslide Forecast[J].Journal of Mountain Research,2011,29(1). |
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| Authors: | LI Changjiang MA Tuhua SUN Leling ZHU Xinsheng |
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| Institution: | LI1 Changjiang,MA Tuhua1,SUN Leling2,ZHU Xinsheng1(1.Zhejiang Information Center of Land and Resources,Hangzhou,310007,China,2.Zhejiang Provincial Department of Land and Mineral Resources,China) |
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| Abstract: | To calibrate antecedent precipitation is a key issue for prediction of rainfall-induced landslides many regions.In this study,a method calculating for effective antecedent rainfall is derived from the power-law relation of the landslide frequency and the rainfall level.The decay factor of antecedent daily rainfall before the landslide event in this model depends on the scaling exponent defined by the power-law correlation and the decay process of daily rainfall within a given period preceding a given day is... |
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| Keywords: | landslides forecast effective antecedent precipitation fractals |
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