scholarly journals Research on water resources dispatch model based on improved genetic algorithm – water resources dispatch model

2020 ◽  
Author(s):  
Haoran Fu ◽  
Huahui Li
Keyword(s):  
Genetic Algorithm ◽  
Water Resources ◽  
Water Supply ◽  
Supply And Demand ◽  
Optimal Operation ◽  
Water Withdrawal ◽  
Practical Significance ◽  
Improved Genetic Algorithm ◽  
Reservoir Water ◽  
Operation Rules

Abstract According to the research of reservoir water resources scheduling and distribution, the aim is to balance the water supply and demand in each period, and consider the total water supply and the annual external water withdrawal of the reservoir in each period as water rights. The decision-making variables are provided for the water supply of the reservoir in the paper, so that water demand of the water-receiving area can be better met to alleviate the water shortage at various stages and realize the effective use of water resources. Moreover, through the constraints of reservoir operation rules and other constraints, a mathematical model is established for optimal operation of water resources in the reservoir system. Meanwhile, optimized genetic algorithms are applied to solve the model according to the characteristics of the model. After simulation tests, compared with the traditional linear binary algorithm used in the reservoir, the improved genetic algorithm studied in the paper improves the accuracy of data calculation and data convergence, which proves that the research results of the paper provide theoretical and practical significance for improving the level of reservoir water resources management and solving the problem of optimal water resources scheduling.

scholarly journals Toward Bridging Future Irrigation Deficits Utilizing the Shark Algorithm Integrated with a Climate Change Model

2019 ◽  
Vol 9 (19) ◽  
pp. 3960 ◽  
Author(s):  
Ehteram ◽  
El-Shafie ◽  
Hin ◽  
Othman ◽  
Koting ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Supply ◽  
Supply And Demand ◽  
Optimal Operation ◽  
Water Runoff ◽  
Change Model ◽  
Reservoir Water ◽  
Temperature And Precipitation ◽  
Water Supply And Demand ◽  
Climate Change Model

Climate change is one of the most effectual variables on the dam operations and reservoir water system. This is due to the fact that climate change has a direct effect on the rainfall–runoff process that is influencing the water inflow to the reservoir. This study examines future trends in climate change in terms of temperature and precipitation as an important predictor to minimize the gap between water supply and demand. In this study, temperature and precipitation were predicted for the period between 2046 and 2065, in the context of climate change, based on the A1B scenario and the HAD-CM3 model. Runoff volume was then predicted with the IHACRES model. A new, nature-inspired optimization algorithm, named the shark algorithm, was examined. Climate change model results were utilized by the shark algorithm to generate an optimal operation rule for dam and reservoir water systems to minimize the gap between water supply and demand for irrigation purposes. The proposed model was applied for the Aydoughmoush Dam in Iran. Results showed that, due to the decrease in water runoff to the reservoir and the increase in irrigation demand, serious irrigation deficits could occur downstream of the Aydoughmoush Dam.

scholarly journals Study on the streamflow compensation characteristics of reservoirs in Luanhe River Basin based on Copula function

2021 ◽  
Author(s):  
Fang Wan ◽  
Lingfeng Xiao ◽  
Qihui Chai ◽  
Li Li
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
River Basin ◽  
Rapid Development ◽  
Supply And Demand ◽  
Copula Function ◽  
Efficient Utilization ◽  
Mutual Compensation ◽  
Luanhe River Basin ◽  
Yuqiao Reservoir

Abstract With the rapid development of economy and society, the contradiction between supply and demand of water resources is increasing. Efficient utilization and allocation of limited water resources are one of the main means to solve the above contradictions. In this paper, the multidimensional joint distribution of natural streamflow series in reservoirs is constructed by introducing the mixed Copula function, and the probability of wet and dry encounters between natural streamflow is analyzed. Luan River is located in the northeastern part of Hebei Province, China, taking the group of Panjiakou Reservoir, Douhe Reservoir and Yuqiao Reservoir in the downstream of Luan River Basin as an example, the probabilities of synchronous and asynchronous abundance and depletion of inflow from the reservoirs are calculated. The results show that the probability of natural streamflow series between reservoirs is 61.14% for wetness and dryness asynchronous, which has certain mutual compensation ability. Therefore, it is necessary to minimize the risk of water supply security in Tianjin, Tangshan and other cities, and strengthen the optimal joint water supply scheduling of reservoirs. The research results are reasonable and reliable, which can provide reference for water supply operation of other basins.

scholarly journals Modeling in Water Resources Management in East Nile Delta: Review

2020 ◽  
Vol 17 (2) ◽  
pp. 41-46
Author(s):  
Heba F. Abdelwahab ◽  
Elsayed M. Ramadan ◽  
Abdelazim M. Negm
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Water Reuse ◽  
Geographical Information Systems ◽  
Nile Delta ◽  
Mathematical Optimization ◽  
Water Shortage ◽  
Optimal Operation ◽  
Geographical Information ◽  
Modelling Studies

AbstractIt is acknowledged that providing a safe water supply for all countries is one of the major challenges of the twenty-first century. Egypt is one of the greatest countries affected in Africa and Middle East. The Nile is facing a major water shortage due to the limited water resources and the the demand is growing as a result high population growth and development in industrial and agricultural sectors. This paper has been motivated by the fact that there is no up-to-date literature review of the optimal operation of Water Resources. The analysis of the reviewed literature is structured along five broad branches: (1) Mathematical Optimization Modelling Studies, (2) Numerical Simulation Modelling Studies, (3) Geographical Information Systems “GIS” based Studies, (4) Ecological Studies, (5) Water Reuse Studies. This review is limited to surface water but groundwater has been inexplicitly included. The paper concludes the best way to identify knowledge to cover the gap between water supply and demands and to guide future researches on water resources planning and management.

The Application of Improved Genetic Algorithm in Optimal Operation of Hydro-junction

2013 ◽  
Vol 8 (10) ◽  
pp. 203-210
Author(s):  
Zhenli Ma ◽  
Chenming Li ◽  
Xuewen Wu ◽  
Aijun Dong ◽  
Lizhong Xu
Keyword(s):  
Genetic Algorithm ◽  
Optimal Operation ◽  
Improved Genetic Algorithm

scholarly journals Study on Production, Domestic and Ecological Benefits of Reservoir Water Supply Based on Emergy Analysis

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1435
Author(s):  
Xinjian Guan ◽  
Pengkun Jiang ◽  
Yu Meng ◽  
Haidong Qin ◽  
Hong Lv
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Evaluation Model ◽  
Emergy Analysis ◽  
Reservoir Water ◽  
Water Users ◽  
Ecological Benefit ◽  
Analysis Theory ◽  
Regulation Function ◽  
Current Water

As an important water conservancy project, it is necessary to evaluate its water supply benefit. Based on the emergy analysis theory, a reservoir water supply benefits evaluation model (RWSBEM) was established. Firstly, the emergy transformity of natural and engineering water body was calculated. Secondly, the water resource values (WRV) of different water users (industrial, agricultural, domestic, ecological) were calculated. Finally, combined with the water supply situation of the reservoir, the various water supply benefits of the reservoir were calculated. Taking Hekoucun reservoir as an example, its ecological water supply benefit is the largest and agriculture is the smallest, followed by industry and life. The results showed that the trend of WRV was domestic > industry > ecology > agriculture, which reflected the contribution and utility of water resources in different industries. Under the condition of current water resources, the planned water supply benefits of the reservoir can be guaranteed in the wet and normal years, but in the dry years, the ecological benefit will be reduced. Therefore, the industry water-saving needs to be further strengthened, and the interannual regulation function of the reservoir should be applied more effectively to maximize the comprehensive benefits of reservoir water supply.

scholarly journals Dynamic Model of a Sustainable Water Resources Utilization System with Coupled Water Quality and Quantity in Tianjin City

2020 ◽  
Vol 12 (10) ◽  
pp. 4254
Author(s):  
Yutong Tian ◽  
Chunhui Li ◽  
Yujun Yi ◽  
Xuan Wang ◽  
Anping Shu
Keyword(s):  
Water Quality ◽  
Water Resources ◽  
Water Supply ◽  
Supply And Demand ◽  
Sustainable Use ◽  
Social Economy ◽  
Using Data ◽  
Water Quality And Quantity ◽  
Sustainable Water Resources ◽  
Water Resources Utilization

With the development of industrial and agricultural production and the social economy, the demand for water resources has gradually increased. In this paper, based on the principles of system dynamics, a sustainable water resources utilization model with coupled water quality and quantity is established using STELLA software to assess the sustainable use of water resources. The model includes two modules: a water supply module and a water quality module. The water supply module includes four sub-systems: economy, population, water supply, and water demand. The water quality module consists of an environmental sub-system. The model is suitable for Tianjin, where water resources are scarce. Calibration is performed using data from 2013–2016, and verification is performed using data from 2017. The simulation results are good. In order to compare the sustainable use of water resources in different development scenarios in Tianjin for 2025, a sensitivity analysis is performed for each variable, and four decision variables are selected to establish four water resources use scenarios (Scenarios 1–4). The results show that, compared with scenario 1, water shortages in scenarios 2 and 3 are delayed. Scenario 4, with stable economic growth and environmental consideration, can effectively resolve the contradiction between water supply and demand in the future, and is more conducive to the improvement of water quality. Finally, based on the above research, measures to solve water resources problems are proposed, in order to provide a reference for the sustainable use of water resources and optimization of water resources allocation in Tianjin.

scholarly journals An Improved Genetic Algorithm for Emergency Decision Making under Resource Constraints Based on Prospect Theory

Algorithms ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 43 ◽  
Author(s):  
Leiwen Chen ◽  
Yingming Wang ◽  
Geng Guo
Keyword(s):  
Genetic Algorithm ◽  
Decision Making ◽  
Prospect Theory ◽  
Resource Constraints ◽  
Emergency Situation ◽  
Practical Significance ◽  
Improved Genetic Algorithm ◽  
Emergency Decision Making ◽  
Emergency Decision ◽  
Value Measurement

The study of emergency decision making (EDM) is helpful to reduce the difficulty of decision making and improve the efficiency of decision makers (DMs). The purpose of this paper is to propose an innovative genetic algorithm for emergency decision making under resource constraints. Firstly, this paper analyzes the emergency situation under resource constraints, and then, according to the prospect theory (PT), we further propose an improved value measurement function and an emergency loss levels weighting algorithm. Secondly, we assign weights for all emergency locations using the best–worst method (BWM). Then, an improved genetic algorithm (GA) based on prospect theory (PT) is established to solve the problem of emergency resource allocation between multiple emergency locations under resource constraints. Finally, the analyses of example show that the algorithm can shorten the decision-making time and provide a better decision scheme, which has certain practical significance.

scholarly journals Simulation of Water Resources Carrying Capacity in Xiong’an New Area Based on System Dynamics Model

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 1085 ◽  
Author(s):  
Boyang Sun ◽  
Xiaohua Yang
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
System Dynamics ◽  
Carrying Capacity ◽  
Environmental Governance ◽  
Supply And Demand ◽  
Groundwater Overdraft ◽  
Water Resources Carrying Capacity ◽  
Water Supply And Demand ◽  
Regional Water

In order to comprehensively evaluate the water resources carrying capacity in Xiong’an New Area, a system dynamics (SD) model was established to evaluate the regional water resources carrying capacity, for which several scenarios were designed: the original development scenario, the accelerated industrialization scenario, the environmental governance scenario, and the optimization development scenario. The results show that, compared with the original development scenario, the water resources carrying capacity in Xiong’an New Area can be improved in other scenarios, but a water supply and demand gap will be generated due to the lack of groundwater overdraft and a water transfer project. In 2026, under the accelerated industrialization scenario, the population carrying capacity will be 2.652 million, and the water supply and demand gap will be 1.13 × 108 m3; under the environmental governance scenario, the population carrying capacity will be 2.36 million, and the water supply and demand gap will be 0.44 × 108 m3; under the optimal development scenario, the population carrying capacity will be 2.654 million, and since the supply of water resources will be greater than the demand, there will not be a gap between supply and demand, making it the most feasible scenario to effectively alleviate the tension between industry restructuring, environmental management, and water resources development and utilization. The findings of this study can provide reference and decision support for optimizing regional water resources allocation and enhancing water resources carrying capacity in Xiong’an New Area.

Analysis on Water Resources Supply and Demand Balance of Rural Land Remediation Project in Baishan City, Jilin Province

2013 ◽  
Vol 295-298 ◽  
pp. 2132-2137
Author(s):  
Xiao Ling Xu ◽  
Xu Feng Liang ◽  
Xiu Juan Liang ◽  
Chang Lai Xiao
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Water Availability ◽  
Water Demand ◽  
Influence Factor ◽  
Supply And Demand ◽  
Rural Land ◽  
Project Area ◽  
Groundwater Availability ◽  
Relevant Calculation

Water resources are an important influence factor of land remediation. As support of food production, analysis of water resources supply and demand balance is an important part and technical support of the construction. According to some relevant calculation formulas on water resources assessment, after forecast of water demand and the calculation of water supply, in the project area of the demonstration construction of whole rural land remediation in Baishan City, the average water availability for many years is 8990.1 thousand m3 each year, in which surface water availability is 7210.6 thousand m3, groundwater availability is 1579.4 thousand m3. Water demand is 5552.4 thousand m3 in 2015, in which water demand for life 4165.2 thousand m3; water demand for agricultural irrigation is 1387.2 thousand m3. Water supply is more than water demand; the results show that there is a slight surplus of water resources in the region. The basic supply-demand balance can be achieved in conditions of the design of water supply project in the project area.

Solving Economical Operation Problem of Basin Cascade Plants Based on Bi-Level Coupling Genetic Algorithm

2013 ◽  
Vol 357-360 ◽  
pp. 2921-2924 ◽  
Author(s):  
Xiao Lu Yin ◽  
Yang Yang
Keyword(s):  
Genetic Algorithm ◽  
Load Distribution ◽  
Optimal Operation ◽  
Optimal Decision ◽  
System Management ◽  
Improved Genetic Algorithm ◽  
Hydropower Plants ◽  
Hydropower System ◽  
Upper Level ◽  
Coupling Algorithm

Bi-level coupling algorithm which is based on the improved genetic algorithm was proposed in this paper. Its upper-level module was designed to solve the load optimal distributing problem among the cascade hydropower plants and its lower-level module was designed to solve the generator group optimal-uniting problem among the generators in a hydropower system. This algorithm has advantages in getting the optimal operation schemes of the load distribution, as well as the generator group unitization at the same time. By using a practical basin cascade plants as an example, the results show that the software can carry on rational and optimal decision to the producing operation schemes. The Bi-level coupling algorithm has higher practical value in hydropower system management.

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