Optimizing the cost-effectiveness of low impact development (LID) practices using an analytical probabilistic approach

摘要

To select optimal LID in urban areas, an optimization assessment framework considering hydrological processes and cost-effectiveness is proposed. To provide the desired runoff reduction efficiencies, hydrological processes of LID were analyzed using a probabilistic analysis of rainfall event characteristics. Meanwhile, life-cycle costs were estimated to determine benefits and costs of implementing different LID units. Finally, various solutions having maximum runoff reductions but different costs were selected using the Non-dominated Sorting Genetic Algorithm II (NSGA-II). The results show that the bioretention cell, which had maximum runoff reduction capacity, was identified as a priority measure for implementation. However, given the potential for large implementation areas, resulting in marked runoff reduction benefits, permeable pavements are a more reasonable measure for the study area. Using the NSGA-II to identify optimal cost-effective LID options is convenient for decision makers, tasked with selecting solutions based on their available budgets and runoff reduction objectives in urban environments.

关键词