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Alternative TitleDevelopment and application of a fuzzy membership model for identifying erosive rainfall events
孙正宝1,2; 陈治谏1; 廖晓勇1; 王海明1
Source Publication水科学进展
Contribution Rank1
Abstract根据降雨及其引发土壤侵蚀是一个连续变化过程的特点,基于次降雨雨量(P)和最大30 min雨强(I_(30))建立了侵蚀性降雨识别的模糊隶属度模型。模型分为3个部分:①推求次降雨各物理参数的模糊隶属度;②将各物理参数的模糊隶属度有机结合起来,获得次降雨的模糊隶属度;③依据次降雨模糊隶属度对自然降雨事件进行判别,筛选出其中的侵蚀性降雨事件,以提高土壤侵蚀预报精度,选用错选度和漏选度两个评价指标对识别结果进行检验。模型在三峡库区陈家沟小流域进行了率定,并在3个空间尺度上进行了应用和检验,错选度均在20%以下。模型结构简单、参数物理意义明确,所需数据直接来自水文、气象观测
Other AbstractSoil erosion caused by rains is a continuous process of changes. Such a soil erosion character is used in the development of a fuzzy membership model for identifying erosive rainfall events. The precipitation amount (P) and the maximum 30 min rainfall intensity (I_30) of a rainfall event are used as two physical parameters in the model. The model involves three parts. The first part calculates the membership values of P and I_30, and constructs the fuzzy membership functions. Secondly, the membership values of P and I_(30) are combined to form a new membership value of individual rainfall event. And finally, an erosive rainfall event is identified using the new membership values. The identified events can be validated through the mistaking degrees and the missing degree. The model is applied over three small-sized watersheds in the Three Gorges Reservoir region of southwest China, including Chenjiagou (8.32 km~2), Daijiagou (0.67 km~2), and Qiaojia (0.02 km~2). The mistaking degrees on the three watersheds are less than 20%. The model has a simple structure, and its parameters have clear physical meaning and can be derived directly from the hydro-meteorological observations
Keyword降雨 土壤侵蚀 模糊逻辑 数学模型 模式识别
Indexed ByCSCD
EI Accession NumberAccession number:20120214672761
Citation statistics
Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding Author陈治谏
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
孙正宝,陈治谏,廖晓勇,等. 侵蚀性降雨识别的模糊隶属度模型建立及应用[J]. 水科学进展,2011,7(3):801-806.
APA 孙正宝,陈治谏,廖晓勇,&王海明.(2011).侵蚀性降雨识别的模糊隶属度模型建立及应用.水科学进展,7(3),801-806.
MLA 孙正宝,et al."侵蚀性降雨识别的模糊隶属度模型建立及应用".水科学进展 7.3(2011):801-806.
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