Evaluation of distributed BMPs in an urban watershedHigh resolution modeling for stormwater management

被引:56
作者
Fry, Timothy J. [1 ,2 ]
Maxwell, Reed M. [1 ,2 ]
机构
[1] Colorado Sch Mines, ReNUWIt Engn Res Ctr, Golden, CO 80401 USA
[2] Colorado Sch Mines, Dept Geol & Geol Engn, Hydrol Sci & Engn Program, Golden, CO 80401 USA
基金
美国国家科学基金会;
关键词
green infrastructure; hydrology; low-impact development; modeling; urban stormwater; water quantity; LOW IMPACT DEVELOPMENT; WATER; INFILTRATION; GREEN; SCALE; REDUCTION; HYDROLOGY; REMOVAL; SYSTEMS; FLOW;
D O I
10.1002/hyp.11177
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
The urban environment modifies the hydrologic cycle resulting in increased runoff rates, volumes, and peak flows. Green infrastructure, which uses best management practices (BMPs), is a natural system approach used to mitigate the impacts of urbanization onto stormwater runoff. Patterns of stormwater runoff from urban environments are complex, and it is unclear how efficiently green infrastructure will improve the urban water cycle. These challenges arise from issues of scale, the merits of BMPs depend on changes to small-scale hydrologic processes aggregated up from the neighborhood to the urban watershed. Here, we use a hyper-resolution (1m), physically based hydrologic model of the urban hydrologic cycle with explicit inclusion of the built environment. This model represents the changes to hydrology at the BMP scale (similar to 1m) and represents each individual BMP explicitly to represent response over the urban watershed. Our study varies both the percentage of BMP emplacement and their spatial location for storm events of increasing intensity in an urban watershed. We develop a metric of effectiveness that indicates a nonlinear relationship that is seen between percent BMP emplacement and storm intensity. Results indicate that BMP effectiveness varies with spatial location and that type and emplacement within the urban watershed may be more important than overall percent.
引用
收藏
页码:2700 / 2712
页数:13
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