کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
568913 | 1452300 | 2013 | 11 صفحه PDF | دانلود رایگان |
• Finds non-dominated sets of BMP configurations for urban stormwater management.
• Efficient multiscale staged optimization using multiobjective differential evolution.
• Pre-optimization of feasible subwatershed BMP configurations for all treatment levels.
• Goals are to minimize cost, sediment load, and sensitivity to increases in precipitation.
• Demonstrated on mixed-use Bartlett Brook watershed in South Burlington, VT, USA.
One challenge of climate change adaptation is to design watershed-based stormwater management plans that meet current total maximum daily load targets and also take into consideration anticipated changes in future precipitation patterns. We present a multi-scale, multiobjective framework for generating a diverse family of stormwater best management practice (BMP) plans for entire watersheds. Each of these alternative BMP configurations are non-dominated by any other identified solution with respect to cost of the implementation of the management plan and sediment loading predicted at the outflow of the watershed; those solutions are then pruned with respect to dominance in sensitivity to predicted changes in precipitation patterns. We first use GIS data to automatically precompute a set of cost-optimal BMP configurations for each subwatershed, over its entire range of possible treatment levels. We then formulate each solution as a real-valued vector of treatment levels for the subwatersheds and employ a staged multiobjective optimization approach using differential evolution to generate sets of non-dominated solutions. Finally, selected solutions are mapped back to the corresponding preoptimized BMP configurations for each subwatershed. The integrated method is demonstrated on the Bartlett Brook mixed-used impaired watershed in South Burlington, VT, and patterns in BMP configurations along the non-dominated front are investigated. Watershed managers and other stakeholders could use this approach to assess the relative trade-offs of alternative stormwater BMP configurations.
Journal: Environmental Modelling & Software - Volume 50, December 2013, Pages 158–168