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Int. J. Environ. Res. Public Health 2018, 15(2), 273; https://doi.org/10.3390/ijerph15020273

Evaluating the Hydrologic Performance of Low Impact Development Scenarios in a Micro Urban Catchment

1
CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
2
School of Geography and Environment, Shandong Normal University, Jinan 250358, China
3
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Received: 9 January 2018 / Revised: 30 January 2018 / Accepted: 31 January 2018 / Published: 5 February 2018
(This article belongs to the Special Issue Stormwater Management in Urban Areas)
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Abstract

As urbanization progresses, increasingly impervious surfaces have changed the hydrological processes in cities and resulted in a major challenge for urban stormwater control. This study uses the urban stormwater model to evaluate the performance and costs of low impact development (LID) scenarios in a micro urban catchment. Rainfall-runoff data of three rainfall events were used for model calibration and validation. The pre-developed (PreDev) scenario, post-developed (PostDev) scenario, and three LID scenarios were used to evaluate the hydrologic performance of LID measures. Using reduction in annual runoff as the goal, the best solutions for each LID scenario were selected using cost-effectiveness curves. The simulation results indicated that the three designed LID scenarios could effectively reduce annual runoff volumes and pollutant loads compared with the PostDev scenario. The most effective scenario (MaxPerf) reduced annual runoff by 53.4%, followed by the sponge city (SpoPerf, 51.5%) and economy scenarios (EcoPerf, 43.1%). The runoff control efficiency of the MaxPerf and SpoPerf scenarios increased by 23.9% and 19.5%, respectively, when compared with the EcoPerf scenario; however, the costs increased by 104% and 83.6%. The reduction rates of four pollutants (TSS, TN, TP, and COD) under the MaxPerf scenario were 59.8–61.1%, followed by SpoPerf (53.9–58.3%) and EcoPerf (42.3–45.4%), and the costs of the three scenarios were 3.74, 3.47 and 1.83 million yuan, respectively. These results can provide guidance to urban stormwater managers in future urban planning to improve urban water security. View Full-Text
Keywords: rainfall-runoff; cost-effectiveness curve; SUSTAIN; Urban non-point pollution; urbanization rainfall-runoff; cost-effectiveness curve; SUSTAIN; Urban non-point pollution; urbanization
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Li, C.; Liu, M.; Hu, Y.; Han, R.; Shi, T.; Qu, X.; Wu, Y. Evaluating the Hydrologic Performance of Low Impact Development Scenarios in a Micro Urban Catchment. Int. J. Environ. Res. Public Health 2018, 15, 273.

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