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中南大学学报(自然科学版)

Journal of Central South University

第34卷    第6期    总第154期    2003年12月

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文章编号:1005-9792(2003)06-0691-04
流域山坡平均坡度的模糊分析
郑 艳,文雨松

(中南大学土木建筑学院,湖南长沙,410075)

摘 要: 运用模糊数学中的模糊聚类理论将流域样本分为2类,用逐步回归分析方法对各类样本进行分析,建立了山坡平均坡度与流域影响因子之间的回归方程.研究结果表明:用该方程计算出的洪峰流量与按传统方法计算的流量相比很接近且偏于安全,相对误差在5%以内;此外,用该方法对流域的划分结果与实际情况比较吻合,而且在现有桥梁的水文检算中可以节约大量时间.

 

关键字: 桥梁;坡度;模糊聚类分析;回归分析;水文检算

Studies on hill slope gradient calculated with other factors on river basin
ZHENGYan, WENYu-song

College of Civil and Architectural Engineering,Central South University,Changsha 410075,China

Abstract:The average gradient of slope on the surface of river basin not only reflects the topographical status of the ri, ver basin, but also affects the runoff condition. The runoff condition is one of the major elements affecting the storm strength and the designed runoff volume. In practical production, especially when old bridges are examined, the average gradient of slope at the upper reach of the river basin shall be calculated. Site survey and measurement will be carried out by people, which means a large amount of work. In this article, the samples of the river basin are classified into two types applying the fuzzy clustering methods of fuzzy mathematics and the regression analysis method is adopted for analyzing each type of samples. Thus a regression equation between the average gradient of slope and the affecting element of river basin can be set up. The flood peak volume calculated according to the result of this article is very close to that calculated with traditional method, with the former being safer at a relative tolerance within 5% .The classified results of the river basin in this article is quite similar to that under actual conditions. A lot of time will be spared for hydrological examination on existing bridges by means of the results of this article, which is also quite feasible in practical production.

 

Key words: bridge; gradient; fuzzy clustering methods; regression analysis; hydrological examination

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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