LIN Jin-chang,LI Jiang-yun,L Jian-xin,et al.Detention Tank Substitute Model for Low Impact Development Facilities[J].China Water & Wastewater,2020,36(23 23):94-100.
Detention Tank Substitute Model for Low Impact Development Facilities
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
23 23
Page:
94-100
Column:
Date of publication:
2020-12-01
- Keywords:
- low impact development (LID) facility; detention tank substitute model for LID facilities; generalization; evaluation method
- Abstract:
- Low impact development (LID) models are generally difficult to implement in engineering due to the large number of parameters required for simulation. Based on the similarity of main flow relationship, the detention tank substitute model for LID facilities was proposed to generalize the drainage system and simulate stormwater in the drainage area with high precision. Detention volume and outlet hole diameter were obtained by simulation, which could be used to evaluate the derformance of LID dacilities. In order to verify the actual performance of LID facilities generalized into the detention tank, three kinds of typical LID facilities were selected to conduct the equivalent experiment of LID detention capacity, including vegetative swale, permeable pavement and rainwater garden. Cross experiments were carried out with slopes of 1%, 3%, 5% and return periods of 1 year, 5 years, and 10 years, respectively. Nash-Sutcliffe efficiency coefficients were all above 0.75 and the mean value was 0.9, indicating that it was feasible to replace LID model for stormwater simulation by detention tank model. In addition, evaluation examples were given. For other types of LID facilities not involved, the detention and runoff processes were similar to the detention tank in nature. Therefore, it was also possible to generalize the characteristics of inflow and outflow into the detention tank model for simulation, and LID substitute model theory and LID facility engineering evaluation method are universal.
Last Update:
2020-12-01