Upgrading and Reconstruction Scheme of Self-Draining Stormwater System in Urban Area Based on Elevation Model and 2D Model
In recent years,there has been an increasingly urgent demand for upgrading and reconstructing self-draining systems in existing urban areas.However,there have been few researches on feasibility study of retaining self-draining mode based on quantitative analysis,or upgrading system capacity with decentralized storage facilities.Taking a stormwater system in Shanghai as an example,this research established a digital elevation model coupling with stormwater system model,and conducted quantitative analysis through elevation analysis and flood risk assessment,and compared and selected drainage patterns.Furthermore,in order to achieve system capacity improvement,this research adopted the method of combining overall system improvement and local flood control.The results indicated that over 90%of the research area was able to meet the self-drainage elevation requirements in combination with urban renewal.Besides,combined with stormwater pipe upgrade,the flood in high-risk area could be eliminated with the decentralized detention facilities consisting of overflow structure,detention pipe,and integrated pump well.This research can provide a reference for upgrading and reconstructing self-draining stormwater systems in existing urban areas.
self-draining systemupgrading and reconstructiondecentralized stormwater detention facilitydigital elevation modelInfoWorks 2D model
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