优化美国普吉特海湾地区生物滞留系统的布局

IF 2.6 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Journal of The American Water Resources Association Pub Date : 2024-06-20 DOI:10.1111/1752-1688.13219
Anish Mahat, Joan Q. Wu, Anand D. Jayakaran, M. Samrat Dahal, Robert P. Ewing
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引用次数: 0

摘要

美国西北太平洋普吉特海湾盆地正经历着快速的人口和城市增长。这种增长对当地的生态系统,尤其是几种鲑鱼的产卵和繁殖栖息地造成了不利影响。该地区需要采用绿色雨水基础设施(GSI)等可持续城市设计策略,在新开发项目中对雨水进行现场管理。然而,任何 GSI 的有效性都取决于其与雨水产生地的相对位置。本研究旨在开发一个基于地理信息系统 (GIS) 的框架,用于优化 GSI(特别是生物滞留系统)的位置。我们计算了普亚卢普河下游流域研究区域的水文敏感性指数(λHSI,表示景观位置的径流生成潜力)。该指数以及联邦和州的可行性标准被用于确定生物滞留系统的合适地点。通过地面实况调查,包括土壤取样和渗透测试,验证了所确定地点的适宜性。我们发现,2.5% 的流域面积适合建造生物滞留系统,主要集中在研究流域的中部和北部。本研究中描述的方法可随时应用于已有空间数据(地形、土壤和土地利用)的流域。我们建议在资源有限的情况下选择高 λHSI 的地点,因为这些地点是产生径流和城市内涝的主要原因。
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Optimizing placement of bioretention systems in the US Puget Sound region

The Puget Sound Basin, US Pacific Northwest, is experiencing rapid population and urban growth. This growth adversely impacts local ecosystems, especially the spawning and rearing habitat for several salmonid species. Sustainable urban design strategies such as green stormwater infrastructure (GSI) are required in the region to manage stormwater onsite when new development occurs. However, the effectiveness of any GSI depends on its location relative to where stormwater is produced. This study aimed to develop a Geographic Information System (GIS)-based framework for the optimal placement of GSI, specifically bioretention systems. We computed the Hydrologic Sensitivity Index (λHSI, indicating runoff generation potential at a landscape location) for the lower Puyallup River Watershed study area. The index and federal and state feasibility criteria were used to identify suitable sites for bioretention systems. The suitability of identified sites was verified through ground-truthing, including soil sampling and infiltration testing. We found that 2.5% of the watershed area was suitable for bioretention, concentrated in the center and north of the study watershed. The method described in this study can be readily applied to watersheds for which spatial data (topography, soil, and land use) are available. We recommend choosing locations with high λHSI when resources are limited since these locations contribute most to runoff generation and urban flooding.

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来源期刊
Journal of The American Water Resources Association
Journal of The American Water Resources Association 环境科学-地球科学综合
CiteScore
4.10
自引率
12.50%
发文量
100
审稿时长
3 months
期刊介绍: JAWRA seeks to be the preeminent scholarly publication on multidisciplinary water resources issues. JAWRA papers present ideas derived from multiple disciplines woven together to give insight into a critical water issue, or are based primarily upon a single discipline with important applications to other disciplines. Papers often cover the topics of recent AWRA conferences such as riparian ecology, geographic information systems, adaptive management, and water policy. JAWRA authors present work within their disciplinary fields to a broader audience. Our Associate Editors and reviewers reflect this diversity to ensure a knowledgeable and fair review of a broad range of topics. We particularly encourage submissions of papers which impart a ''take home message'' our readers can use.
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