Technique for Estimating the Magnitude and Frequency of Floods in the Houston, Texas, Metropolitan Area
Technique for Estimating the Magnitude and Frequency of Floods in the Houston, Texas, Metropolitan Area
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德克萨斯州休斯顿大都市区洪水强度和频率的估计技术
DOI：
10.3133/wri8017
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
B. C. Massey
中科院分区：
文献类型：
--
作者：
Fred Liscum;B. C. Massey
摘要：开发了一种技术，用于估计的规模和频率的洪水在休斯敦，得克萨斯州，大都市地区的流量数据，在该地区的非管制流的多元回归洪水频率分析。一个回归模型，洪水洪峰流量，同时降雨和前期土壤水分条件，被用来模拟67年的记录，年洪峰流量。洪水频率特性的模拟年峰值和观测到的年峰值在每个22个计量站。流域面积，银行全渠道输送，和城市发展的百分比作为自变量，加权洪水频率流量作为因变量，在多元回归分析。适用于不受管制的河流的关系，预测洪水的重现期为2，5，10，25，50，100和500年。流域面积从1.33到182平方英里不等。这些流域的城市发展百分比从37%到98.9%不等。的关系表明，作为一个盆地的变化，从一个完全的自然状态到一个完全的城市化，2年的峰值流量的大小增加了4.2倍，50年的峰值的大小增加了4.9倍，100年的峰值的大小增加了4.9倍。（作者）
Abstract : A technique for estimating the magnitude and frequency of floods in the Houston, Texas, metropolitan area was developed by use of a multiple-regression flood-frequency analysis of flow data from unregulated streams in the area. A regression model, relating flood-peak discharge to concurrent rainfall and antecedent soil moisture conditions, was used to simulate 67-year records of annual peak discharges. Flood-frequency characteristics were determined for the simulated annual peaks and for the observed annual peaks at each of 22 gaging stations. Drainage area, bank-full channel conveyance, and percentage of urban development were used as independent variables; and weighted flood-frequency discharges were used as dependent variables in the multiple regression analysis. Relationships applicable to unregulated streams were developed for predicting floods with recurrence intervals of 2, 5, 10, 25, 50, 100, and 500 years. Drainage basins ranged in area from 1.33 to 182 square miles. The percentage of urban development in these basins ranges from 37 to 98.9 percent. The relationships indicate that as a basin changes from a completely natural state to one of complete urbanization, the magnitude of a 2-year peak discharge is increased by a factor of 4.2, the magnitude of a 50-year peak is increased by a factor of 4.9, and the magnitude of a 100-year peak is increased by a factor of 4.9. (Author)