scholarly journals Flood Mitigation by Permeable Pavements in Chinese Sponge City Construction

Water ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 172 ◽  
Author(s):  
Maochuan Hu ◽  
Xingqi Zhang ◽  
Yim Siu ◽  
Yu Li ◽  
Kenji Tanaka ◽  
...  
Keyword(s):  
Flood Mitigation ◽  
Sponge City ◽  
Permeable Pavements ◽  
City Construction

scholarly journals Assessing the Effectiveness and Cost Efficiency of Green Infrastructure Practices on Surface Runoff Reduction at an Urban Watershed in China

Water ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 24
Author(s):  
Fazhi Li ◽  
Jingqiu Chen ◽  
Bernard A. Engel ◽  
Yaoze Liu ◽  
Shizhong Wang ◽  
...  
Keyword(s):  
Green Infrastructure ◽  
Cost Efficiency ◽  
Cost Effective ◽  
Green Roofs ◽  
Urban Watershed ◽  
Sponge City ◽  
Permeable Pavements ◽  
Runoff Reduction ◽  
Implementation Effect ◽  
City Construction

Studies on the assessment of green infrastructure (GI) practice implementation effect and cost efficiency on an urban watershed scale helps the GI practice selection and investment decisions for sponge city construction in China. However, few studies have been conducted for these topics at present. In this study, the Long-Term Hydrologic Impact Assessment—Low Impact Development (L-THIA-LID) 2.1 model was applied to assess the effectiveness and cost efficiency of GI practices on surface runoff volume reduction in an urban watershed—the Hexi watershed, Nanjing City, China. Grassed swales, bioretentions, green roofs, rain cisterns, permeable pavements, wet ponds, dry ponds, and wetlands were chosen as potential GI practices for sponge city construction based on feasibility analysis. Results showed that grassed swales were the most cost-effective practice (0.7 CNY/m3/yr), but the total implementation effect of grassed swales was not obvious due to the small area of suitable locations. Permeable pavements performed best on runoff reduction, but the cost efficiency was much lower. Correspondingly, bioretentions were compromise practices. Green roofs were the least cost-effective practices, with the cost efficiency at 122.3 CNY/m3/yr, but it was much lower for rain cisterns, which were 3.2 CNY/m3/yr. Wet ponds, dry ponds, and wetlands were potential practices implemented in development areas, of which dry ponds were the most cost-effective (2.7 CNY/m3/yr), followed by wet ponds (10.9 CNY/m3/yr). The annual runoff volume of the total area could be reduced by up to 47.01% by implementing GI practices in buildup areas. Rain cisterns (RC) and permeable pavements (PP) were the best combination for this area, and bioretentions (BR) and green roofs (GR) followed. Grassed swales (GS1), dry ponds (DP), wet ponds (WP), and wetlands (WL) were not wise choices due to the small suitable location areas. This study also demonstrated the feasibility of the L-THIA-LID 2.1 model for the evaluation of GI practice implementation effects and cost efficiency on urban runoff in sponge city construction in China.

scholarly journals Coupling of SWMM With 2D Hydrodynamic Model for Simulation of Sponge City Construction Scheme

2021 ◽  
Vol 643 ◽  
pp. 012002
Author(s):  
Yuyan Fan ◽  
Chengwen Wang ◽  
Haijun Yu ◽  
Junhao Pan ◽  
Zilu Ouyang
Keyword(s):  
Hydrodynamic Model ◽  
Sponge City ◽  
Construction Scheme ◽  
City Construction

scholarly journals Research on SWMM Runoff Control Index Decomposition Based on Constraint Optimization Method

2021 ◽  
Vol 237 ◽  
pp. 04008
Author(s):  
Shiyuan Huang ◽  
Pengfei Liu ◽  
Hongqin Zhang ◽  
Zhipeng Ding
Keyword(s):  
Model Simulation ◽  
Simulation Method ◽  
Optimization Method ◽  
Annual Runoff ◽  
Constraint Optimization ◽  
Sponge City ◽  
Total Runoff ◽  
Index Decomposition ◽  
Runoff Control ◽  
City Construction

The “Sponge City Construction Technical Guide” mentions the method for decomposing and implementing the annual total runoff control rate: volume method and model simulation method. Through research, it is found that the two are based on the control detailed planning level in decomposing the scale parameters of LID facilities. The indicators to each block are allocated through repeated tests through experience and trial calculations, resulting in a lack of scientific rationality in the process and results of the indicator decomposition, and because the Guide is still in the trial stage, there are few researches on the decomposition of runoff control indicators represented by SWMM. Therefore, with the help of MATLAB’s constraint optimization module and SWMM hydro-hydraulic model, this study proposes a complete set of decomposition ideas and methods for the decomposition and implementation of the annual runoff total control rate in the special planning of sponge city, and the index decomposition process through relevant cases Elaborate.

A Multi-variable & Multi-objective Optimization Framework for LID Layout in Sponge City

2021 ◽  
Author(s):  
Sijie Tang ◽  
Jiping Jiang ◽  
Yi Zheng
Keyword(s):  
Ecological Factors ◽  
Green Roofs ◽  
Design Tool ◽  
Distribution Area ◽  
Multi Objective Optimization ◽  
Nsga Ii ◽  
Sponge City ◽  
Multi Objective ◽  
Optimization Framework ◽  
City Construction

<p>Practitioners usually design the plan of Sponge City construction (SCC) by combining LID facilities (e.g., rain garden, rain barrels, green roofs, and grassed swales) according to their personal experiences or general guidelines. The layout (including selection, connection and distribution area) of LID facilities is subjective, in the risk of far from optimal combination. Previous researchers have developed some LID optimization tools, which only consider the dimension and number of LIDs in a given scenario. Therefore, it is necessary to develop a flexible and extensible design tool with the support of urban hydrological model to conduct the facilities layout optimization. This study introduced a SWMM-based multi-variable and multi-objective optimization framework called CAFID (Comprehensive Assessment and Fine Design Model of Sponge City) to meet this end. The assessment module with multi-objective couples diverse controlling end-points (e.g., total runoff, peak runoff, pollutant concentration, cost, and customized social-ecological factors) as the candidates of assessment criteria. The optimization module with multi-variable is implemented by SWMM, starting with three steps: 1) Full allocation. Based on the availability, list the candidates of LID facility for each sub-catchment; 2) Full connection. Order the potential stream direction of surface runoff from rainfall to municipal network, based on possible hierarchical structure of sub-catchments and LID facilities; 3) Full coverage. Identify all the suitable area for LID facility in sub-catchment. The optimization on the 3 variables, the selection, connection, and area, is powered by NSGA-II and TOPSIS algorithms, which make it possible that we choose a final result from the set of nondominated solutions according to special weight distribution. The effectiveness of CAFID was illustrated through a case of Sponge City in Fenghuangcheng of Shenzhen City, one of 30 national pilot sponge cities in China. As well, this new framework is expected to be widely verified and applied in Sponge City construction in China or similar concepts all over the world.</p>

SPONGE CITY CONSTRUCTION IN CHINA:THE ACHIEVEMENTS AND CHANLLEGES

2019 ◽  
Author(s):  
HAIFENG JIA ◽  
YUNTAO GUAN ◽  
HUI WANG ◽  
CHENWEN WANG
Keyword(s):  
Sponge City ◽  
City Construction
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