臺灣地區人口大量聚積於都市，高度土地開發使得原有的水文環境產生改變，造成地表逕流量增加，以及洪峰到達時間提前等情況發生，致使都市承受高強度降雨的能力逐漸下降。考量大型水利工程措施難以施作於人口聚積的老舊城市，因此若能於土地開發過程，同時設置基地滯蓄設施，將可降低開發行為所導致的逕流量增加。本研究應用地理資訊系統技術，整合地理資訊系統理論、水文分析理論，以及土地開發之相關法律規定建立網路作業平台，以提供建築師於系統平台進行基地滯蓄設施之規劃設計。本作業平台之分析流程可分為滯蓄設施初步擬定、基地整合式水文分析，相關法規檢核等三個階段。當使用者登入系統平台之後，即可連結空間資料庫，載入道路圖層、土地利用分區資料，以及下水道網路資料。若進一步選定滯蓄設施型式與尺寸容量，以及上下游入出流連結位置，即可自動擷取鄰近雨量站不同重現期之降雨強度資料，以計算基地開發所增加的逕流量，以及水流經過滯蓄設施所降低的洪峰量。本作業平台亦提供相關法規檢核標準，以確認使用者所規劃滯蓄設施的合適性。本系統作業平台能以清楚的圖形介面，展示滯蓄設施與基地排水路之銜接，並可透網路直接遞送滯蓄設施資訊予相關主管機關，進行後續法規檢核工作，以簡化繁複的設計分析與審查程序。

Rapid development of populated urban areas in Taiwan has stimulated the change of hydrological environment. The land development has resulted in increasing the runoff peak and shortening the time to peak discharge, which reduce the resilience of cities during severe rainstorms. Considering that structure measures may not be easy to implement in populated cities, detention facilities set on building basements have been proposed to compromise the increase of surface runoff resulting from the development. In this study, a web-based operational platform has been developed to integrate the GIS technologies, hydrological analyses, as well as relevant regulations for the design of detention facilities. The design procedure embedded in the system includes a prior selection of type and size of the detention facilities, integrated hydrological analysis for the developing site, and to check whether the detention design and outflow control complies with the relevant regulations. After user login the platform, designers can access the system database to retrieve street maps, land use coverages, and storm sewer information. Once the type, size, inlet, and outlet of the detention facilities are assigned, the system can acquire the rainfall intensity-duration-frequency information from adjacent rain gauges to perform hydrological analyses for the developing site. The increase of the runoff volume due to the development and the reduction of the outflow peak through the construction of the detention facilities can be estimated. The outflow peak at the developing site is then checked with relevant regulations to confirm the suitability of the design of the detention facilities. The proposed web-based platform can provide a concise layout of the detention facilities and the drainage way of the developing site on a graphical interface. Moreover, the design information can be delivered directly through a web link to authorities for inspecting to simplify the complex administrative procedures.