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_id	ecaade2023_460
id	ecaade2023_460
authors	Papanikolaou, Kyratsoula-Tereza, Liapi, Katherine, Sibetheros, Ioannis and Vlachaki, Evangelia
year	2023
title	A Simulation Model for Stormwater Runoff Management in Urban Blocks
doi	https://doi.org/10.52842/conf.ecaade.2023.2.287
source	Dokonal, W, Hirschberg, U and Wurzer, G (eds.), Digital Design Reconsidered - Proceedings of the 41st Conference on Education and Research in Computer Aided Architectural Design in Europe (eCAADe 2023) - Volume 2, Graz, 20-22 September 2023, pp. 287–296
summary	The shift towards Water Sensitive Urban Design (WSUD) has become a necessity for many cities with warm and dry climates which are still using conventional rainwater management and are adversely affected by extreme rainfall episodes or persistent heatwaves. However, WSUD still remains a complex issue for architects that requires specialized technical knowledge, relevant experience, and interdisciplinary collaboration. The paper presents initial results of an “architect friendly” computer-based model, developed by the authors, that facilitates the assessment of the efficacy of non-conventional, water-sensitive, stormwater management strategies in urban blocks, measured by the stormwater runoff mitigation. The model allows for the design and visualization of stormwater management scenarios on surfaces of selected urban blocks, as well as the quantitative comparison of their impact on runoff reduction. Users can choose from a range of different Best Management Practices (BMPs) from the BMP library of the model, create their own stormwater management scenarios, assess them, and finally choose the most appropriate one with regard to its impact on stormwater runoff. BMPs added in the library include green roofs with different substrate depths and plant types, facades, stormwater harvesting cisterns, raingardens and permeable paving. The Grasshopper programming environment has been used for the development of the model, the integration of as-built climate data and the incorporation of runoff estimation equations based on the Soil Conservation Service Curve Number (SCS-CN) method. The paper compares the results of different stormwater management scenarios that involve several BMP types and geometries, applied on an urban block in Athens, Greece. Based on this case study results, preliminary conclusions are drawn regarding the user-friendliness of the model’s interface and data requirements, as well as the effectiveness of the model’s visualization process.
keywords	Stormwater best management practices, urban blocks, runoff mitigation, decision support tool, environmental impact visualization
series	eCAADe
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last changed	2023/12/10 10:49

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