Estimation of Urban Imperviousness and its Impacts on Storm Water Systems
Estimation of Urban Imperviousness and its Impacts on Storm Water Systems
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DOI：
10.1061/(asce)0733-9496(2003)129:5(419
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发表时间：
2003-08
影响因子：
3.1
通讯作者：
J. Lee;J. Heaney
中科院分区：
文献类型：
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作者：
J. Lee;J. Heaney
不透水性是城市化对雨水系统影响的重要指标。进行了水文分析，以评估迈阿密一个公寓地区的长期影响。结果表明：52年间，直连不透水区占流域总径流量的72%，占流域总径流量的44%；很少有研究对构成城市土地最大比例的住宅区进行高精度的DCIA测量。利用地理信息系统和实地调查，对科罗拉多州博尔德市一个5.81公顷的住宅区进行了详细的城市不透水分析。该研究区域的总不透水面积为35.9%，DCIA为13.0%。交通相关的不透水性占DCIA的97.2%。该地区的水文模型显示，在五个不同精度水平上测量的不透水率估计峰值流量相差约265%。这些结果表明需要关注……
Imperviousness is an important indicator of the impact of urbanization on storm water systems. A hydrologic analysis was performed to evaluate long-term impacts from an apartment area in Miami. The result shows that the directly connected impervious area (DCIA), which covers 44% of the catchment, contributes 72% of the total runoff volume during 52 years. Few studies have actually measured the DCIA with a high level of accuracy for residential areas that constitute the largest proportion of urban land. A detailed analysis of urban imperviousness was performed using geographic information systems and field investigations on a 5.81 ha residential area in Boulder, Colo. For this study area, the total impervious area is 35.9% and the DCIA is 13.0%. Transportation-related imperviousness comprises 97.2% of the DCIA. Hydrologic modeling of this area shows about a 265% difference in estimates of peak discharge with imperviousness measured at five different levels of accuracy. These results suggest the need to foc...