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Frontiers of Environmental Science & Engineering

ISSN 2095-2201

ISSN 2095-221X(Online)

CN 10-1013/X

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2018 Impact Factor: 3.883

Front. Environ. Sci. Eng.    2020, Vol. 14 Issue (2) : 21    https://doi.org/10.1007/s11783-019-1200-x
RESEARCH ARTICLE
Scenario-based assessment and multi-objective optimization of urban development plan with carrying capacity of water system
Yilei Lu1, Yunqing Huang1, Siyu Zeng1,2(), Can Wang1,2
1. School of Environment, Tsinghua University, Beijing 100084, China
2. Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084, China
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Abstract

• Impact of urban development on water system is assessed with carrying capacity.

• Impacts on both water resource quantity and environmental quality are involved.

• Multi-objective optimization revealing system trade-off facilitate the regulation.

• Efficiency, scale and structure of urban development are regulated in two stages.

• A roadmap approaching more sustainable development is provided for the case city.

Environmental impact assessments and subsequent regulation measures of urban development plans are critical to human progress toward sustainability, since these plans set the scale and structure targets of future socioeconomic development. A three-step methodology for assessing and optimizing an urban development plan focusing on its impacts on the water system was developed. The methodology first predicted the pressure on the water system caused by implementation of the plan under distinct scenarios, then compared the pressure with the carrying capacity threshold to verify the system status; finally, a multi-objective optimization method was used to propose regulation solutions. The methodology enabled evaluation of the water system carrying state, taking socioeconomic development uncertainties into account, and multiple sets of improvement measures under different decisionmaker preferences were generated. The methodology was applied in the case of Zhoushan city in South-east China. The assessment results showed that overloading problems occurred in 11 out of the 13 zones in Zhoushan, with the potential pressure varying from 1.1 to 18.3 times the carrying capacity. As a basic regulation measure, an environmental efficiency upgrade could relieve the overloading in 4 zones and reduce 9%‒63% of the pressure. The optimization of industrial development showed that the pressure could be controlled under the carrying capacity threshold if the planned scale was reduced by 24% and the industrial structure was transformed. Various regulation schemes including a more suitable scale and structure with necessary efficiency standards are provided for decisionmakers that can help the case city approach a more sustainable development pattern.

Keywords Urban development plan      Urban water system      Carrying capacity      Scenario analysis      Multi-objective optimization     
Corresponding Author(s): Siyu Zeng   
Issue Date: 19 December 2019
 Cite this article:   
Yilei Lu,Yunqing Huang,Siyu Zeng, et al. Scenario-based assessment and multi-objective optimization of urban development plan with carrying capacity of water system[J]. Front. Environ. Sci. Eng., 2020, 14(2): 21.
 URL:  
https://academic.hep.com.cn/fese/EN/10.1007/s11783-019-1200-x
https://academic.hep.com.cn/fese/EN/Y2020/V14/I2/21
Fig.1  Methodological  flow chart.
Domestic Scale of socioeconomic activities in 2020 Efficiencies Prediction
P
(10000
persons)
θ DU
(L/capita
/d)
RU (L/capita/d) β γ SC e(mg/L) SN e(mg/L) WU (10000 m3) DC (t) DN (t)
BAU
scenario
70 0.75 179 97 0.74 0.07 100 25 4050 5039 881
BAE
scenario
195 120 0.95 0.1 60 8 4500 2265 297
Tab.1  Pressure  prediction of the domestic sector of Dinghai District in two scenarios
Industrial Scale of socioeconomic activities in 2020 Efficiencies Prediction
In 2010 Best efficiency available BAU scenario BAE scenario
Vi
(billion Yuan)
IUi
(m3/10000
Yuan)
ICi
(kg/10000
Yuan)
INi
(kg/10000 Yuan)
IUi
(m3/10000
Yuan)
ICi
(kg/10000
Yuan)
INi
(kg/10000 Yuan)
WU
(10000 m3)
DC (t) DN (t) WU
(10000 m3)
DC (t) DN (t)
Ship building and repairing 60 1.6 0.7 0.0009 1.3 0.15 0.0009 960 4200 5 780 900 5
Petrochemical 35 1.8 0.006 0.0002 1.7 0.0052 0.00012 630 21 1 595 18 0
Aquatic product processing 20 8.5 3.9 0.16 8 1.34 0.1144 1700 7800 320 1600 2680 229
Power 4 4.9 0.2 0.01 4.8 0.15 0.001 196 80 4 192 60 0
Tab.2  Pressure  prediction of the industrial sector of Dinghai District in two scenarios
Agriculture Scale of socioeconomic activities in 2020 Efficiencies a) Prediction
In 2010 Best efficiency available BAU scenario BAE scenario
Ai
(10000m2 or capita)
AUi
(m3/m2 or capita)
ACi
(kg/10000 m2 or capita)
ANi
(kg/10000 m2 or capita)
AUi
(m3/m2 or capita)
ACi
(kg/10000 m2 or capita)
ANi
(kg/10000 m2 or capita)
WU (10000 m3) DC (t) DN
(t)
WU (10000 m3) DC (t) DN
(t)
Aquaculture 227 0.75 535 74 0.7 500 70 170 121 17 159 113 16
Livestock cultivation 11.91 7.22 91824 11634 7.02 91824 11634 86 1094 139 84 1094 139
Crop farming 8380 0.19 0 5 0.17 0 5 1592 0 42 1425 0 38
Tab.3  Pressure prediction of the agricultural  sector of Dinghai District in two scenarios
Fig.2  Overloading  index values of the 13 zones in 2020.
Fig.3  Optimization  results of the four objective functions in Dinghai District.
Fig.4  Optimal  industrial scales for Dinghai District based on different decision preferences.
Fig.5  The  planned and optimal industrial scale and structure of the 13 zones in Zhoushan.
Fig.6  Industrial  overloading index values of the 13 zones in 2020 after the multi-objective optimization.
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