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Assessing stormwater runoff reduction capacity of existing green infrastructure in the city of Ghent
International Journal of Sustainable Development and World Ecology ( IF 5.6 ) Pub Date : 2020-03-17 , DOI: 10.1080/13504509.2020.1739166
Luyuan Li 1 , Veerle Van Eetvelde 2 , Xin Cheng 1 , Pieter Uyttenhove 1
Affiliation  

ABSTRACT

Stormwater runoff is the major source of surface flooding in urban communities. Urban surface water flooding is one of the most worrisome issues, due to their negative impacts on public health. Green infrastructure has developed as an alternative approach to cope with urban surface water flooding. The runoff reduction capacity of green infrastructure needs to be elucidated to better support green infrastructure planning. There are some models to assess the runoff reduction capacity of the landscape. However, these models do not consider landscape patterns and usually need large time, data, making it less accessible to urban planners and decision-makers. A group of studies have indicated that landscape structures are significantly affecting the surface runoff. Therefore, an empirical model was adapted in this study, including two parameters of runoff coefficient and landscape metrics, to map the runoff reduction capacity of green infrastructure in the city of Ghent. The results show that grasslands contribute most to stormwater runoff reduction of 118.3 million m 3 and forests controlled the lowest runoff of 44.8 million m 3 . Agriculture lands with the highest reduction amount per square kilometer of 3.51 million m 3 / k m 2 , and Forests with the lowest of 1.92 million m 3 / k m 2 . The spatial distribution of runoff reduction capacity of green infrastructure indicates the high capacity green infrastructure is mainly concentrated in the southwest and northeast suburban areas. The core areas scattered with less green infrastructure and low runoff reduction capacity. The results provide a better understanding of spatial characteristics and stormwater runoff reduction capacity of existing green infrastructure in Ghent.



中文翻译:

评估根特市现有绿色基础设施的雨水径流减少能力

摘要

雨水径流是城市社区地表洪水的主要来源。由于城市地表洪水对公共卫生的负面影响,是最令人担忧的问题之一。绿色基础设施已经发展成为应对城市地表水泛滥的替代方法。需要阐明绿色基础设施的径流减少能力,以更好地支持绿色基础设施规划。有一些模型可以评估景观的径流减少能力。但是,这些模型没有考虑景观格局,通常需要大量时间和数据,因此城市规划人员和决策者无法使用这些数据。一组研究表明,景观结构显着影响了地表径流。因此,本研究采用了经验模型,包括径流系数和景观度量的两个参数,以绘制根特市绿色基础设施的径流减少能力。结果表明,草原对减少雨水径流贡献最大,达1.183亿 3 森林控制的最低径流量为4,480万 3 。每平方公里减少量最大的农业用地351万 3 / ķ 2 ,而最低的森林为192万 3 / ķ 2 。绿色基础设施减少径流量的空间分布表明,高容量绿色基础设施主要集中在西南和东北郊区。核心区域分散,绿色基础设施较少,径流减少能力较低。结果提供了对根特现有绿色基础设施的空间特征和减少雨水径流能力的更好理解。

更新日期:2020-03-17
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