Evaluating the Impact of Urban Growth on the Design of Storm Water Drainage Systems

被引:17
|
作者
Abd-Elhamid, Hany F. [1 ,2 ]
Zelenakova, Martina [3 ]
Vranayova, Zuzana [4 ]
Fathy, Ismail [1 ]
机构
[1] Zagazig Univ, Fac Engn, Dept Water & Water Struct Engn, Zagazig 44519, Egypt
[2] Shaqra Univ, Coll Engn, Civil Engn Dept, Dawadmi 11911, Saudi Arabia
[3] Tech Univ Kosice, Fac Civil Engn, Dept Environm Engn, Kosice 04200, Slovakia
[4] Tech Univ Kosice, Fac Civil Engn, Dept Bldg Facil, Kosice 04200, Slovakia
关键词
urbanization; storm water drainage systems; runoff coefficient; StormCAD; KSA; RIVER-BASIN; RUNOFF; URBANIZATION; RISK;
D O I
10.3390/w12061572
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Urban growth is one of the major causes of flooding in urban areas. This affects the runoff coefficients, which is among the most important factors that affect the design of storm water drainage systems. Changing the runoff coefficient will affect the design parameters of the drainage network, including outfall discharge, velocity, lag time and cost of construction. This study aims to assess the effect of changing the runoff coefficient due to urban growth on the design of a storm water drainage system. The hydrological models Hyfran, StormCAD and GIS are used to analyze different runoff coefficients. This study examines three zones in Dammam in the Kingdom of Saudi Arabia (KSA). The data developed from the models for the current case studies are used to develop an empirical equation to predict the max discharge for other catchments. The discharge is a function of the return period, runoff coefficient, drainage density, longest path, rainfall intensity and catchment area. To validate the developed equation, we use it to estimate the discharge in a real case study in South Korea. A comparison between the measured discharge and estimated discharge shows that the empirical equation is capable of predicting the maximum discharge for different catchments with high accuracy. Then, the validation of the models is carried out to determine the effect of the runoff coefficient on the design of a storm water drainage system in a case study in KSA. The results show that an increasing runoff coefficient due to urban growth increases the outfall discharge and velocity of storm water drainage systems, as well as affecting the cost of construction and decreasing the lag time. The cost increases by two to three times with increasing urbanization. This study provides a new perspective on the hydrologic impact of urban growth on the design of storm water drainage systems, which are essential for flood management. Moreover, the relationship between urban growth and the cost of storm drainage networks is explored, which could help decision makers to make appropriate judgements.
引用
收藏
页数:22
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