Site-Scale Integrated Decision Support Tool (i-DSTss) for Stormwater Management

• Published in: Water (Basel) Vol. 11; no. 10; p. 2022
• Main Authors: Ali Shojaeizadeh, Mengistu Geza, John McCray, Terri S. Hogue
• Format: Journal Article
• Language: English
• Published: MDPI AG 01-10-2019
• Subjects: best management practice (bmp); optimization; stormwater management
• ISSN: 2073-4441
• DOI: 10.3390/w11102022

A site-scale integrated decision support tool (i-DSTss) is developed for selection and sizing of stormwater Best Management Practices (BMPs). The tool has several component modules-hydrology, BMP selection, BMP sizing, and life-cycle cost analysis (LCCA)-integrated into a single platform. The hydrology module predicts runoff from small catchment on event and continuous basis using the Green-Ampt and Curve Number methods. The module predicted runoff from a small residential area and a parking lot with R2 value of 0.77 and 0.74, respectively. The BMP selection module recommends a BMP type appropriate for a site based on economic, technical, social and environmental criteria using a multi-criteria optimization approach. The BMP sizing module includes sizing options for green roofs, infiltration-based BMPs, and storage-based BMPs. A mass balance approach is implemented for all types of BMPs. The tool predicted outflow rates from a permeable pavement with R2 value of 0.89. A cost module is included where capital, operation and maintenance, and rehabilitation costs are estimated based on BMP size obtained from the sizing module. The i-DSTss is built on an accessible platform (Microsoft Excel VBA) and can be operated with a basic skillset. The i-DSTss is intended for designers, regulators, and municipalities for quick analysis of scenarios involving interaction among several factors.