Impacts of Urban Development on Flooding: A Case Study of Flamingo and Tropicana Watershed, Clark County
Impacts of Urban Development on Flooding: A Case Study of Flamingo and Tropicana Watershed, Clark County
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DOI：
10.1061/9780784483060.021
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发表时间：
2020-07
期刊：
影响因子：
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通讯作者：
T. Shaikh;Rubab Saher;Sajjad Ahmad;Daniel Gerrity;H. Stephen
中科院分区：
文献类型：
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作者：
T. Shaikh;Rubab Saher;Sajjad Ahmad;Daniel Gerrity;H. Stephen
拉斯维加斯山谷经历了重大的发展，从而增加了城市洪水。本研究以Flamingo流域为例，利用流域模型分析城市发展对城市洪水的影响。输入数据包括降水、土壤特性、海拔和土地覆盖。城市发展是通过增加不透水率来实现的。在ArcGIS中使用数字高程模型（DEM）数据集划定子流域和流线。径流计算采用自然资源保护局（NRCS）曲线数法。水文工程中心水文管理系统（HEC-HMS）被用来估计流量过程线。通过改变子流域的曲线数对模型进行了校正。产生了两个城市化情景，不透水面增加5%和10%。结果表明，由于不透水面的增加，洪峰流量提前。此外，由于城市化的不渗透性增加，特定风暴事件的总排放量和峰值排放量正在增加。这项研究提供了有用的洞察水文响应城市发展，可以帮助洪水修复。
Las Vegas valley has undergone significant development, thus increasing urban flooding. This study analyzes the impacts of urban development on urban flooding in the Flamingo watershed by using a watershed model. The input data includes precipitation, soil characteristics, elevation, and land cover. Urban development is incorporated through increasing percent impervious. Sub-watersheds and streamlines were delineated in ArcGIS using digital elevation model (DEM) dataset. Natural Resources Conservation Service (NRCS) curve-number method was used for the calculation of runoff. The Hydrologic Engineering Center-Hydrologic Management System (HEC-HMS) was used to estimate the discharge hydrograph. The model was calibrated through changing the curve number of the sub-basins. Two urbanization scenarios created with a 5% and 10% increase in impervious surfaces were generated. The results showed that peak discharge occurred earlier due to increase in impervious surfaces. Moreover, the total discharge volume and peak discharge for a given storm event were increasing due to increased imperviousness from urbanization. This study provides useful insight into a hydrological response to urban development that can be helpful in flood remediation.