The capacity of grey infrastructure in urban flood management: A comprehensive analysis of grey infrastructure and the green-grey approach
The capacity of grey infrastructure in urban flood management: A comprehensive analysis of grey infrastructure and the green-grey approach
复制标题
灰色基础设施在城市防洪中的能力：灰色基础设施和绿灰色方法的综合分析
DOI：
10.1016/j.ijdrr.2021.102045
复制
发表时间：
2021-01-21
影响因子：
5
通讯作者：
Yang, Zhiyong
中科院分区：
文献类型：
--
作者：
Chen, Wenjie;Wang, Weiqi;Yang, Zhiyong
城市洪水管理应采取多种形式，以应对不同的洪水形势，人口快速增长和气候变化。深入研究深埋隧道、管网等灰色基础设施的优缺点，是科学、高效地应用绿色-灰色混合基础设施的必要条件。将一种新的城市洪水模型应用于高度城市化地区的灰色基础设施评价。还比较了绿灰方法。结果表明，深埋隧道减小了洪峰流量，缩短了洪峰时间。管网的改善降低了洪峰流量，但不影响洪峰流量的时间。然而，深隧道不能减轻由污水管道容量不足引起的局部淹没，而管网改善不能减轻由回水淹没引起的淹没。此外，管网的改善往往会产生新的下游淹没热点。绿灰基础设施对城市防洪减灾的作用优于灰色基础设施。建议采用混合绿灰方法。绿色与灰色基础设施的合理组合可以提高城市防洪管理的稳定性和有效性。
Urban inundation management should take various forms to deal with different flood situations, rapid popula-tion growth, and climate change. Research on the advantages and disadvantages of grey infrastructure, such as deep tunnels and pipe networks, is necessary to apply hybrid green-grey infrastructure scientifically and effi-ciently. A novel urban flood model was applied in a highly urbanized region to evaluate the grey infrastructure. Green-grey approaches were also compared. The results showed that deep tunnels decreased the peak flood volume and shortened the time of peak flow. Pipe network improvements decreased the peak flood volume but did not affect the time of peak flow. However, the deep tunnels could not mitigate local inundations caused by insufficient sewer pipe capacity, whereas pipe network improvements could not mitigate inundations caused by backwater flooding. Moreover, pipe network improvements tended to generate new downstream inundation hot-spots. Green-grey infrastructures performed better than grey infrastructures for urban flood reduction. A hybrid green-grey approach was recommended. Suitable combinations of green-grey infrastructures improve the sta-bility and effectiveness of urban flood management.