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DOI | 10.3390/w10080991 |
Cumulative Effects of Low Impact Development on Watershed Hydrology in a Mixed Land-Cover System | |
Hoghooghi, Nahal1,2; Golden, Heather E.3; Bledsoe, Brian P.2; Barnhart, Bradley L.4; Brookes, Allen F.4; Djang, Kevin S.5; Halama, Jonathan J.4; McKane, Robert B.4; Nietch, Christopher T.6; Pettus, Paul P.4 | |
发表日期 | 2018-08-01 |
ISSN | 2073-4441 |
卷号 | 10期号:8 |
英文摘要 | Low Impact Development (LID) is an alternative to conventional urban stormwater management practices, which aims at mitigating the impacts of urbanization on water quantity and quality. Plot and local scale studies provide evidence of LID effectiveness; however, little is known about the overall watershed scale influence of LID practices. This is particularly true in watersheds with a land cover that is more diverse than that of urban or suburban classifications alone. We address this watershed-scale gap by assessing the effects of three common LID practices (rain gardens, permeable pavement, and riparian buffers) on the hydrology of a 0.94 km(2) mixed land cover watershed. We used a spatially-explicit ecohydrological model, called Visualizing Ecosystems for Land Management Assessments (VELMA), to compare changes in watershed hydrologic responses before and after the implementation of LID practices. For the LID scenarios, we examined different spatial configurations, using 25%, 50%, 75% and 100% implementation extents, to convert sidewalks into rain gardens, and parking lots and driveways into permeable pavement. We further applied 20 m and 40 m riparian buffers along streams that were adjacent to agricultural land cover. The results showed overall increases in shallow subsurface runoff and infiltration, as well as evapotranspiration, and decreases in peak flows and surface runoff across all types and configurations of LID. Among individual LID practices, rain gardens had the greatest influence on each component of the overall watershed water balance. As anticipated, the combination of LID practices at the highest implementation level resulted in the most substantial changes to the overall watershed hydrology. It is notable that all hydrological changes from the LID implementation, ranging from 0.01 to 0.06 km(2) across the study watershed, were modest, which suggests a potentially limited efficacy of LID practices in mixed land cover watersheds. |
英文关键词 | LID practices;watershed scale;impervious area;peak flow;surface runoff;shallow subsurface runoff and infiltration;evapotranspiration |
语种 | 英语 |
WOS记录号 | WOS:000448462700025 |
来源期刊 | WATER
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来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/59652 |
作者单位 | 1.US EPA, Oak Ridge Inst Sci & Educ, Off Res & Dev, Natl Exposure Res Lab, Cincinnati, OH 45268 USA; 2.Univ Georgia, Coll Engn, Inst Resilient Infrastruct Syst, Athens, GA 30602 USA; 3.US EPA, Natl Exposure Res Lab, Off Res & Dev, Cincinnati, OH 45268 USA; 4.US EPA, Western Ecol Div, Natl Hlth & Environm Effects Res Lab, Corvallis, OR 97330 USA; 5.US EPA, Inoventures LLC, Western Ecol Div, Natl Hlth & Environm Effects Res Lab, Corvallis, OR 97330 USA; 6.US EPA, Natl Risk Management Res Lab, Cincinnati, OH 45268 USA |
推荐引用方式 GB/T 7714 | Hoghooghi, Nahal,Golden, Heather E.,Bledsoe, Brian P.,et al. Cumulative Effects of Low Impact Development on Watershed Hydrology in a Mixed Land-Cover System[J]. 美国环保署,2018,10(8). |
APA | Hoghooghi, Nahal.,Golden, Heather E..,Bledsoe, Brian P..,Barnhart, Bradley L..,Brookes, Allen F..,...&Pettus, Paul P..(2018).Cumulative Effects of Low Impact Development on Watershed Hydrology in a Mixed Land-Cover System.WATER,10(8). |
MLA | Hoghooghi, Nahal,et al."Cumulative Effects of Low Impact Development on Watershed Hydrology in a Mixed Land-Cover System".WATER 10.8(2018). |
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