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.

scholarly journals Effective Evaluation of Infiltration and Storage Measures in Sponge City Construction: A Case Study of Fenghuang City

Water ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 937 ◽  
Author(s):  
Jinjun Zhou ◽  
Jiahong Liu ◽  
Weiwei Shao ◽  
Yingdong Yu ◽  
Kun Zhang ◽  
...  
Keyword(s):  
Drainage System ◽  
Annual Runoff ◽  
Hunan Province ◽  
Chinese Government ◽  
Control Effect ◽  
Sponge City ◽  
Runoff Control ◽  
City Construction ◽  
And Storage

In recent years, urban waterlogging problems have become more and more serious, which has led to flood disasters in some cities. The Chinese government launched the sponge city pilot construction in 2015 to mitigate the risk of urban flooding and control the runoff in source areas. Rain-runoff control is one of the main indices of a sponge city, thus, evaluating its control effect is essential for sponge city construction. This paper chose Fenghuang city, located in the west of Hunan province, as a case study area to assess the rainwater control effect by using the MIKE FLOOD model. The results showed that: (1) the total annual runoff control rate (TARCR) of sponge city design was a reasonable indicator for daily rainwater control; (2) the goal of Fenghuang Sponge City was close to the 1-year rainfall event; and (3) infiltration and storage measures could reduce but not eliminate urban waterlogging. The capacity of the drainage system should be fundamentally improved to enhance the prevention standards of urban waterlogging.

scholarly journals Study on the strategy of improving urban resilience from the perspective of sponge city construction

2020 ◽  
Author(s):  
Fujun Xia ◽  
Keyword(s):  
Research Methods ◽  
Quantitative Research ◽  
Model Simulation ◽  
Evaluation Model ◽  
Water Environment ◽  
Urban Resilience ◽  
Sponge City ◽  
Quantitative Research Methods ◽  
Main Research ◽  
City Construction

Urban resilience refers to the ability of a city to cope with disasters and recover its basic functions rapidly. Urban transportation, urban infrastructure, urban public policy-making and other aspects can improve the resilience of the city. At present, the urban water environment in China is still deteriorating, and the rainstorm and waterlogging disasters are still frequent. Therefore, the author chooses the sponge city construction to study the strategies to improve the urban resilience. The author chooses two aspects of urban storm and waterlogging disaster control and surface runoff, which are closely related to the improvement of urban resilience, as the main research objects, selects specific evaluation indexes and proposes calculation functions, and adopts multiple research methods such as typical case study, spatial model simulation quantitative analysis, statistical analysis and empirical research, through arc GIS analysis, PCSWMM modeling and grasshopper data-based research By means of design and horizontal comparative study of three practical cases, this paper makes a qualitative and quantitative study on the strategy of sponge city construction performance to improve the city's resilience, and the quantitative research is mainly used. There are two main achievements in this study: a set of quantitative research methods to improve the resilience of sponge city construction is preliminarily explored through the application of the evaluation model; some strategies to improve the resilience of sponge city construction are proposed.

scholarly journals Research on the schemes formulation and optimization method of sponge reconstruction in a highway service area

2020 ◽  
Vol 82 (12) ◽  
pp. 2889-2901
Author(s):  
Yu-hua Peng ◽  
Zhuang Li ◽  
Yong-shuai Ding
Keyword(s):  
Evaluation System ◽  
Low Impact Development ◽  
Optimization Method ◽  
Service Area ◽  
Utilization Rate ◽  
Analytic Hierarchy ◽  
Total Runoff ◽  
Functional Zoning ◽  
Control Goal ◽  
Runoff Control

Abstract This study proposed a method for constructing a low impact development (LID) plan to improve the utilization rate of rainwater in a highway service area and solve the problem of waterlogging. Firstly, based on the theory of LID, taking the total runoff as the control goal, and combining it with the functional zoning of the highway service area and the characteristics of LID facilities, several LID schemes were proposed. Then, the evaluation system of the LID scheme in service area was established by the analytic hierarchy process (AHP). These preliminary construction schemes were compared from three aspects (runoff control efficiency, economic efficiency and social efficiency) to determine the best LID plan. Finally, taking the Pu'er tunnel service area as an example, the construction scheme of the sponge city service area was optimized.

scholarly journals Research on the Dynamic Evolution of Sponge City Construction Risk Based on System Dynamics

2021 ◽  
Author(s):  
Hui Zhao ◽  
Zhijie Li ◽  
Jingqi Zhang
Keyword(s):  
Risk Factors ◽  
System Dynamics ◽  
Model Simulation ◽  
Mechanism Analysis ◽  
Analysis Model ◽  
Sponge City ◽  
Grounded Theory Method ◽  
Construction Risk ◽  
City Construction ◽  
Whole Life Cycle

Abstract Following the research idea of "theoretical analysis -- mechanism analysis -- model simulation", the basic concept and basic theory of sponge city construction risk are firstly defined, and then the risk factors and internal mechanism of sponge city construction are analyzed by the grounded theory method. Finally, the system dynamics model is used for simulation. The dynamic development and key risk factors of each sub-risk system in the whole life cycle are analyzed, and the countermeasures to reduce the risk of sponge city construction are given.

scholarly journals A New Strategy for Sponge City Construction of Urban Roads: Combining the Traditional Functions with Landscape and Drainage

Water ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 3469
Author(s):  
Chengyao Wei ◽  
Jin Wang ◽  
Peirong Li ◽  
Bingdang Wu ◽  
Hanhan Liu ◽  
...  
Keyword(s):  
Removal Rate ◽  
Steel Slag ◽  
Drainage System ◽  
Oxygen Demand ◽  
Annual Runoff ◽  
Volume Control ◽  
Sponge City ◽  
New Strategy ◽  
Basic Functions ◽  
City Construction

Urban roads play a key role in sponge city construction, especially because of their drainage functions. However, efficient methods to enhance their drainage performance are still lacking. Here, we propose a new strategy to combine roads, green spaces, and the drainage system. Generally, by considering the organization of the runoff and the construction of the drainage system (including sponge city facilities) as the core of the strategy, the drainage and traffic functions were combined. This new strategy was implemented in a pilot study of road reconstruction conducted in Zhangjiagang, Suzhou, China. Steel slag was used in the structural layers to enhance the water permeability of the pavement and the removal of runoff pollutants. The combined effects of this system and of the ribbon biological retention zone, allowed achieving an average removal rate of suspended solids, a chemical oxygen demand, a removal of total nitrogen and total phosphorus of 71.60%, 78.35%, 63.93%, and 49.47%; in contrast, a traditional road could not perform as well. Furthermore, the volume control rate of the annual runoff met the construction requirements (70%). The results of the present study indicate that, combining the traditional basic functions of roads with those of landscape and drainage might be a promising strategy for sponge city construction of urban road.

scholarly journals Mathematical Optimization Method of Low-Impact Development Layout in the Sponge City

2020 ◽  
Vol 2020 ◽  
pp. 1-17 ◽  
Author(s):  
Hong Men ◽  
Hao Lu ◽  
Wenjuan Jiang ◽  
Duo Xu
Keyword(s):  
Low Impact Development ◽  
Mathematical Optimization ◽  
Cost Benefit ◽  
Optimization Method ◽  
Rainfall Runoff ◽  
Sponge City ◽  
Total Runoff ◽  
Rainfall Runoff Model ◽  
The Cost ◽  
Runoff Model

Aiming at the optimization layout of distributed low-impact development (LID) practices in the sponge city, a new mathematical method combining Stormwater Management Model (SWMM) and preference-inspired co-evolutionary algorithm using goal vectors (PICEA-g) was developed and was applied in the Ximen waterlogged area of Pingxiang City. Firstly, a block-scaled rainfall-runoff model was built in the study area by using SWMM. Then, an LIDs area optimization model was established by linking the SWMM and the PICEA-g based on the Matlab platform, which took the area ratios of various LIDs in each block as decision variables and took the total runoff, peak flow, suspended substance (SS) pollutant, and LIDs cost as objective functions. Thus, the problem of LIDs layout was turned into a mathematical optimization issue. So the cost-benefit optimal solutions with different emphases were found by using this algorithm, and the LIDs layout optimal scheme for this area was further analysed and verified by rainfall-runoff model. The results show that the total runoff reduction rates of the system reach a maximum of 21.8%, the peak flow reduction rates of the system are more than 10%, and the SS pollutant reduction rates are reduced by about 30% compared with before LIDs under the design storms of different return periods. The reduction rates of each runoff index are higher than the nondominated sorting genetic algorithm II (NSGA-II) method, and decision-makers can more effectively analyse the cost-benefit optimal solution from the Pareto solution sets. Therefore, the LIDs layout optimization method proposed in this paper has obvious advantages in solving similar many-objective optimization problems (MOOPs) in sponge city construction.

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 What Causes Waterlogging?—Explore the Urban Waterlogging Control Scheme through System Dynamics Simulation

2021 ◽  
Vol 13 (15) ◽  
pp. 8546
Author(s):  
Weike Chen ◽  
Jing Dong ◽  
Chaohua Yan ◽  
Hui Dong ◽  
Ping Liu
Keyword(s):  
Risk Factors ◽  
System Dynamics ◽  
Urban Areas ◽  
Model Simulation ◽  
Urban Expansion ◽  
Dynamics Simulation ◽  
Coupling Mechanism ◽  
Data Governance ◽  
Sponge City ◽  
Management Optimization

It is a common phenomenon in cities that waterlogging affects people’s normal life. It is of great significance for targeted transformation and upgrading to identify the risk factors of urban waterlogging. This paper collected the waterlogging data of Tianjin in China, analyzed the coupling mechanism among waterlogging risk factors of urban drainage systems, and then selected the system dynamics theory and the Vensim software as the analysis tools due to the mixing characteristic and the limited availability of data. After that, the sensitive factors were identified by model simulation and sensitivity analysis, and the prominent impact of urban expansion on waterlogging risk was discussed. Then, through the comparison of the three simulation scenarios, it was found that, compared with the urban development focus shifting strategy, the strategies of sponge city reconstruction and management optimization could achieve the risk control goal within a shorter time. On this basis, two kinds of governance schemes with strong operability were put forward, which were the data governance strategy and the sponge city reconstruction strategy of giving priority to old urban areas. According to the simulation results, a city can reverse the increasing trend of waterlogging risk within ten years under the appropriate scheme. Furthermore, the paper puts forward the strategic reimagining of the rural revitalization strategy and the ecological restoration strategy for the long-term sustainable development transformation of Tianjin.

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