Management of Urban Stormwater at Block-Level (MUST-B): A New Approach for Potential Analysis of Decentralized Stormwater Management Systems

Cities worldwide are facing problems to mitigate the impact of urban stormwater runoff caused by increasing occurrence heavy rainfall events and re-densification. This study presents a new approach for estimating potential Management Urban STormwater at Block-level (MUST-B) decentralized blue-green infrastructures here called low-impact developments (LIDs) already existing environments. The MUST-B method was applied area in northern part City Leipzig, Germany. Study areas divided into blocks smallest functional units considering two different soil permeability three events, seven scenarios have been developed: current situation, surface infiltration, swale trench trough-trench combinations extensive roof greening, shaft infiltration. LIDs simulated their maximum retention/infiltration required estimated together with cost calculation. results showed that even 100 year event can be fully retained infiltrated within on low (kf = 10?6 m/s). differed depending scenario responded events. It is shown allows simple down- up-scaling process settings facilitates decision making implementing blue-green-infrastructure retain, store, infiltrate block level.