| 基于多因素模糊综合评判的河网糙率求解 |
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| 引用本文： | 霍 光,王义刚. 基于多因素模糊综合评判的河网糙率求解[J]. 河海大学学报(自然科学版), 2006, 34(5): 518-521 |
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| 作者姓名： | 霍 光 王义刚 |
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| 作者单位： | 河海大学水文水资源与水利工程科学国家重点试验室,江苏,南京,210098;河海大学海洋学院,江苏,南京,210098 |
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| 基金项目： | 国家自然科学基金资助项目(50339010) |
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| 摘 要： | 将模糊数学的理论和方法引入到河网糙率计算中,通过多相模糊统计法和建立在模糊一致矩阵基础上的决策方案优选法,确定糙率模糊集的隶属函数及断面平均流速、水力半径、水面比降等因素的权重,最终由最大隶属度原则确定糙率所在的模糊子集.对河网糙率进行多因素模糊综合评判,可以将河网各河道糙率值控制在一较小区间范围内,再在该范围内对糙率值进行微调,确定最终糙率值.以珠江三角洲1998年7月洪水为例,对该方法进行验证,计算结果与实际结果相吻合.
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| 关 键 词： | 河网 糙率 隶属函数 权重 隶属度 |
| 文章编号： | 1000-1980（2006）05-0518-04 |
| 收稿时间： | 2005-11-12 |
| 修稿时间： | 2005-11-12 |
Determination of roughness of river network based on comprehensive multi-factor fuzzy evaluation |
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| HUO Guang,WANG Yi-gang. Determination of roughness of river network based on comprehensive multi-factor fuzzy evaluation[J]. Journal of Hohai University (Natural Sciences ), 2006, 34(5): 518-521 |
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| Authors: | HUO Guang WANG Yi-gang |
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| Affiliation: | 1. State Key Laboratory of Hydrology-Water Resources and Hydropower Engineering, Hohai University, Nanjing 210098, China;2. College of Ocean, Hohai University, Nanjing 210098, China |
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| Abstract: | The theory and method of fuzzy mathematics are introduced into the calculation of roughness of river network.The polyphase fuzzy statistics and optimization of decision scheme based on fuzzy consistent matrix are applied to determine the membership function of roughness fuzzy set and the weight of some factors,such as the average sectional velocity,hydraulic radius,surface slope,etc.Finally,the roughness fuzzy subsets are determined by the principle of the maximum membership degree.Based on comprehensive multi-factor fuzzy evaluation of roughness of river network,the roughness of individual reaches can be limited to a small range,and through micro modification,the roughness is finally obtained.The method is verified with the flood in July,1998 in Pearl Delta,and the calculated results are in good agreement with the reality. |
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| Keywords: | river network roughness membership function weight membership degree |
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