基于降雨情景模擬的排水系統內澇風險評估與分析
- Title:
- Waterlogging Risk Assessment and Analysis of Urban Drainage System Based on Rainfall Scenario Simulation
- Keywords:
- font-size: 10pt; ">urban drainage system; rainfall scenario simulation; waterlogging risk assessment; GIS system; plain
river network city
摘要:- 現今大多數城市建成區雨水管網存在設計標準偏低、源頭控制徑流能力低等問題，使得內澇風險增加。以某平原水網城市為例，采用地理信息系統（GIS）技術與綜合流域排水系統模型InfoWorks ICM相結合的方法，對不同降雨重現期進行情景模擬，分析評估內澇風險，并通過對模擬結果進行水量平衡分析，得出需要通過增設源頭LID設施、管道提標改造、合理布置外圍排澇設施等措施有針對性地預防內澇發生、降低內澇風險。
Abstract:- At present, problems of low design standard and low source control capacity exist in storm pipe network in most urban built- up areas, which increases the risk of waterlogging. Taking a plain river network city for eample, the geographic information system (GIS) technology combined with integrated catchment drainage system model InfoWorks ICM were applied to simulate scenarios at different rainfall return periods,the urban waterlogging risk was analyzed and assessed, and water balance analysis was carried out on the simulation results. It was concluded that measures should be taken to prevent the occurrence of waterlogging and reduce the risk of waterlogging by adding LID facilities at the source, upgrading pipelines, and reasonably arranging peripheral drainage facilities.
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