CHEN Gang,WANG Lin,ZHANG Han.Model Error Analysis of Low Impact Development Simulated by SWMM[J].China Water & Wastewater,2021,37(13 13):98-102.
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Model Error Analysis of Low Impact Development Simulated by SWMM

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 13 13 Page: 98-102 Column: Date of publication: 2021-07-01
Author(s):
CHEN Gang1; 2; WANG Lin1; ZHANG Han1; 2
(1. College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; 2. Key Laboratory of Marine Environment and Ecology , Ocean University of China, Qingdao 266100, China)
Keywords:
low impact development (LID); storm water management model (SWMM); error analysis
Abstract:
Application of storm water management model (SWMM) to evaluate the performance of low impact development (LID) facilities has become a common technical method. However, when LID facilities are constructed in a subcatchment area and the facilities do not occupy the whole area, it will cause re-partitioning of pervious area, impervious area and zero-impervious area, resulting in model errors. Based on the basic principle of subcatchment area equivalent partitioning of SWMM, simulation error characteristics of adding LID facilities to subcatchment area with catchment mode of Outlet were explored. When the LID facilities outflow did not enter the pervious area, the model error caused by the re-partitioning of the subcatchment area was smaller, and this error increased with the increase of the maximum surface overflow path length and the proportion of LID facility area in the subcatchment area.
Last Update: 2021-07-01