scholarly journals Study of Comprehensive Utilization of Water Resources of Urban Water Distribution Network

Water ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 2791
Author(s):  
Chi Xu ◽  
Zhenyang Peng ◽  
Hongya Zhang ◽  
Zijie He
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Water Level ◽  
Rapid Development ◽  
River System ◽  
Ecological Environment ◽  
Urban Water ◽  
Comprehensive Utilization ◽  
Better Regulation ◽  
Gucheng Lake

China is a country where the levels of water resources per capita are extremely low. With the rapid development of urbanization, water resource shortages have become a bottleneck existing in more and more cities. This study considers the comprehensive management of urban flood control, water supply, water and the ecological environment, catches the main contradiction between “water deficient” and “water rich” in cities, puts forward a comprehensive utilization pattern for urban water resources by emphasizing the utilization of rain–flood resources. After a simulation study, a better regulation pattern is brought out and achieve multiple benefits based on the river system of Gucheng Lake, which is located in Nanjing, Gaochun district, by optimizing conventional regulation. The results show that two parameters, the low water level (LWL) below which Gucheng Lake stops supplying ecological water, and the high water level (HWL) where Gucheng Lake stops importing water from rivers, are the key parameters to decide the regulation benefits, and the LWL of 9 m and HWL of 12 m is the best combination in river network regulation, the annual potential utilizable of rain–flood resources of Gucheng Lake river system can reach 57 million m3 per year, through the comprehensive utilization of the rain–flood resources, the negative effect of flood is effectively reduced and the disaster is controlled on one hand; and the water demand of urban and rural water supply, 100,000 m3/day, is effectively guaranteed as well as the regional ecological environment is improved on the other hand.

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 Urban Water Utilization Scheme: an Analysis of Information Systems of Innovative Management

2019 ◽  
Vol 2018 (4) ◽  
pp. 157-163
Author(s):  
Каринэ Фонтана ◽  
Karine Fontana ◽  
Баграт Ерзнкян ◽  
Bagrat Yerznkyan
Keyword(s):  
Information Systems ◽  
Water Resources ◽  
Water Supply ◽  
Sustainable Urban Development ◽  
Urban Water ◽  
Urban Water Supply ◽  
Water Utilization ◽  
Sustainable Water Supply ◽  
Innovative Management ◽  
Utilization Scheme

The paper features some relevant issues of developing an adequate policy in the field of urban water supply. The authors analyze the information systems of innovative management of organizations of the urban water utilization scheme, recycling of water resources and sewage. They identify the specifics of information systems from the point of view of their use in the Russian practice of sustainable water supply. The research involved analytical and logical methods, as well as theoretical developments in the field of management of urban organizations. As a result, the authors managed to identify the tools for the strategy of sustainable urban water utilization scheme. They prove that its development is hindered by the lack of comprehensive and reliable information to support strategic development, policy development, and management decisions. Based on the analysis of information systems, they point out topical issues that need to be addressed at various levels and introduce new principles for the urban water utilization scheme. Sustainable urban development is inextricably linked with the solution of the water supply problem, including recycling of water resources and sewage. The paper offers some provisions for a sustainable urban water supply strategy.

Urban-Water Harmony model to evaluate the urban water management

2014 ◽  
Vol 70 (11) ◽  
pp. 1774-1781 ◽  
Author(s):  
Yifan Ding ◽  
Deshan Tang ◽  
Yuhang Wei ◽  
Sun Yin
Keyword(s):  
Water Management ◽  
Water Resources ◽  
Urban Areas ◽  
Large Scale ◽  
Rapid Development ◽  
Urban Expansion ◽  
Water Environment ◽  
Integrated Approach ◽  
Urban Water ◽  
Urban Water Management

Water resources in many urban areas are under enormous stress due to large-scale urban expansion and population explosion. The decision-makers are often faced with the dilemma of either maintaining high economic growth or protecting water resources and the environment. Simple criteria of water supply and drainage do not reflect the requirement of integrated urban water management. The Urban-Water Harmony (UWH) model is based on the concept of harmony and offers a more integrated approach to urban water management. This model calculates four dimensions, namely urban development, urban water services, water–society coordination, and water environment coordination. And the Analytic Hierarchy Process has been used to determine the indices weights. We applied the UWH model to Beijing, China for an 11-year assessment. Our findings show that, despite the severe stress inherent in rapid development and water shortage, the urban water relationship of Beijing is generally evolving in a positive way. The social–economic factors such as the water recycling technologies contribute a lot to this change. The UWH evaluation can provide a reasonable analysis approach to combine various urban and water indices to produce an integrated and comparable evaluation index. This, in turn, enables more effective water management in decision-making processes.

scholarly journals The Storage and Water Quality Characteristics of Rungiri Quarry Reservoir in Kiambu, Kenya, as a Potential Source of Urban Water

Hydrology ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 93 ◽  
Author(s):  
Winfred Kilonzo ◽  
Patrick Home ◽  
Joseph Sang ◽  
Beatrice Kakoi
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Surface Water ◽  
Water Resources ◽  
Water Supply ◽  
Storage Capacity ◽  
World Health ◽  
Urban Water ◽  
Water Quality Status ◽  
Quality Status

Urbanization has caused limitations on water resources, while climate change has reduced amounts of surface water in some parts of the world. Kikuyu, a suburban area in Kiambu county, Kenya, is facing this challenge. The major challenge in the study is scarcity of potable water, resulting in inadequate water supply to Kikuyu residents. Currently, only 63.6% of the population is being supplied with water by Kikuyu Water Company, the company mandated to supply water to the area. Water demand was 2972 m3/day in 2015 and was projected to be 3834 m3/day by 2025. This has put pressure on the already exploited clean water resources, making it necessary to seek additional sources of domestic water. Storage capacity and water quality of surface water bodies, especially small reservoirs whose water can be used to ease the demand, need to be assessed for supplemental water supply. This study aimed at assessing the suitability of the abandoned quarry reservoir as a source of potable urban water by determining its storage capacity characteristics and water quality status. Volume characteristics were determined using bathymetry survey in January 2019. Water samples were collected in January and August 2019 and analyzed for chemical, physical, and bacteriological quality, as per the American Public Health Association (APHA) standard methods for water and wastewater. Parameters were evaluated based on World Health Organization (WHO) and Kenya Bureau of Standards (KEBS) guidelines for drinking water, and rated based on the drinking water quality index (WQI). The reservoir’s maximum storage capacity was found to be 128,385 m3, the surface area was 17,699 m2, and the maximum depth was 15.11 m. Nineteen of the twenty-five investigated parameters were within the acceptable standards. However, the concentrations of manganese (Mn), cadmium (Cd), iron (Fe), turbidity, total coliforms, and Escherichia coli (E. coli) were above the acceptable limits. Manganese and iron levels increased with depth. The overall WQI of the reservoir was 82.51 and 85.85 in January and August, respectively. Therefore, based on WQI rating, the water scored a good quality rating and could be used for domestic supply upon treatment. The original achievement of this study is establishment of the volume of the water in the quarry as an additional source of water to the nearby community, along with water quality status.

scholarly journals Assessing the Coordination of Regional Water and Soil Resources and Ecological Environment System Based on Development Rate Characteristics

2021 ◽  
Author(s):  
Qiang Fu ◽  
Kun cheng ◽  
Kang xu He ◽  
Kotaro Tagawa
Keyword(s):  
Water Resources ◽  
Information Science ◽  
Rapid Development ◽  
Development Rate ◽  
Ecological Environment ◽  
Annual Growth Rate ◽  
Coordinated Development ◽  
Raw Data ◽  
Environmental System ◽  
Coordination Model

Abstract The coordinated development of land and water resources and the ecological environment is essential to regional sustainable development. In view of the current rapid development of information science, the coordination degree of eco-environmental systems has been evaluated from the perspective of development rate. Taking the major grain-producing areas in China as an example, this study used information entropy to determine the weights of various indicators and introduced the average annual growth rate to characterize the development rates of indicators. Through an improved dynamic coupling and coordination model, the coupling and coordination indices of the system and subsystems of land and water resources with the ecological environment were obtained. These indices were analyzed and compared with those generated from raw data. The results showed that during the study period, the land and water resources and the ecological-environmental system had a relatively low coupling, with reluctant coordination, and had a relatively low level of coordinated development. Compared with the results based on raw data, the development rate method yielded similar results on the coupling of subsystems. For the analysis of trends, the method using development rate characteristics better reflected the overall coupling of the system, as well as the coordination of the system when considering the range of relative changes. Therefore, evaluation results based on development rate characteristics can, to a certain degree, better help decision-makers timely understand the coordinated development of the land and water resources and the ecological-environmental system.

scholarly journals Machine Learning, Urban Water Resources Management and Operating Policy

Resources ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 173 ◽  
Author(s):  
Evangelos Rozos
Keyword(s):  
Dynamic Programming ◽  
Water Resources ◽  
Water Supply ◽  
Network Flow ◽  
Supply System ◽  
Water Supply System ◽  
Urban Water ◽  
Bayesian Decision ◽  
Operating Policy ◽  
Classical Statistics

Meticulously analyzing all contemporaneous conditions and available options before taking operations decisions regarding the management of the urban water resources is a necessary step owing to water scarcity. More often than not, this analysis is challenging because of the uncertainty regarding inflows to the system. The most common approach to account for this uncertainty is to combine the Bayesian decision theory with the dynamic programming optimization method. However, dynamic programming is plagued by the curse of dimensionality, that is, the complexity of the method is proportional to the number of discretized possible system states raised to the power of the number of reservoirs. Furthermore, classical statistics does not consistently represent the stochastic structure of the inflows (see persistence). To avoid these problems, this study will employ an appropriate stochastic model to produce synthetic time-series with long-term persistence, optimize the system employing a network flow programming modelling, and use the optimization results for training a feedforward neural network (FFN). This trained FFN alone can serve as a decision support tool that describes not only reservoir releases but also how to operate the entire water supply system. This methodology is applied in a simplified representation of the Athens water supply system, and the results suggest that the FFN is capable of successfully operating the system according to a predefined operating policy.

Groundwater Level Prediction Using Support Vektor Machines and Autoregressive (AR) Modelss

2017 ◽  
Author(s):  
Fatih Üneş ◽  
Mustafa Demirci ◽  
Yunus Ziya Kaya ◽  
Eyup Ispir ◽  
Mustafa Mamak
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Ground Water ◽  
Water Level ◽  
Groundwater Level ◽  
Irrigation Water ◽  
Ground Water Level ◽  
Water Level Fluctuations ◽  
Amik Plain ◽  
Groundwater Level Prediction

Water resources managers can benefit from accurate prediction of the availability of groundwater. Ground water is a major source of water in Turkey for irrigation, water supply and industrial uses. The ground water level fluctuations depend on several factors such as rainfall, temperature, pumping etc. In this study, Hatay Amik Plain, Kumlu region was evaluated using Autoregressive (AR) and Support Vektor Machines (SVMs) methods. The monthly groundwater level was used the previous years data belonging to the Kumlu region.

The Urban Ecological Sensitivity Analysis of Enshi city Based on GIS and Analytic Hierarchy Process Model

2013 ◽  
Vol 671-674 ◽  
pp. 2599-2603 ◽  
Author(s):  
Ting Huang ◽  
Sheng Gao Cheng ◽  
Zhong Xia Hu
Keyword(s):  
Analytic Hierarchy Process ◽  
Process Model ◽  
Rapid Development ◽  
Spatial Differentiation ◽  
River System ◽  
Ecological Environment ◽  
Sensitive Area ◽  
Analytic Hierarchy ◽  
Ecological Sensitivity ◽  
Hierarchy Process

With the rapid development of urbanization in China, the ecological environment is more and more seriously threatened; most cities should be focused on urban ecological environment construction and protection. In this paper, we choose the vegetation, slope, elevation, surface river system as the factors, and their weights were determined by analytic hierarchy process (AHP). Applying with GIS spatial analysis technique, the ecological sensitivity of the four factors was divided into four grades which contains high sensitive area, moderately sensitive area, low sensitive area and insensitive area areas occupied 9.43%, 36.46%, 50.61% and 3.50%. There existed a significant spatial differentiation in the ecological sensitivity of Enshi city. This study could provide scientific references for the city's environmental protection and economic development, to help its economic growth.

scholarly journals Assessment of water resources carrying capacity based on fuzzy comprehensive evaluation – case study of Jinan, China

2020 ◽  
Author(s):  
Yi Wu ◽  
Zhongyu Ma ◽  
Xiang Li ◽  
Li Sun ◽  
Shaohua Sun ◽  
...  
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Carrying Capacity ◽  
Water Demand ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Ecological Environment ◽  
Utilization Rate ◽  
Water Resources Carrying Capacity ◽  
Per Capita

Abstract Jinan is a city that typifies the water resource shortage in North China. This study selected nine indices to evaluate the regional water resources carrying capacity (WRCC), which is an important constraining factor in relation to socioeconomic development and the ecological environment. The AHP-CRITIC weighting method was applied to determine the index weighting, and WRCC dynamics during 2011–2016 were analysed and evaluated quantitatively using the fuzzy comprehensive evaluation method. The results revealed the following. (1) During 2011–2016, the comprehensive score of the WRCC was <0.4, indicating poor WRCC. (2) The degree membership of the average evaluation results to V1, V2, and V3 increased successively during 2011–2016. The degree membership of V2 in 2011–2013 was greater than that of V3; however, the situation was reversed during 2014–2016. (3) The indices of available amount of water resources per capita, utilization rate of water resources, water supply per capita, modulus of water supply, quota of domestic water demand, and population density were factors that affected the WRCC of Jinan unfavourably. Conversely, the indices of water demand per 10,000 Yuan industrial output value and water use rate of the ecological environment were factors that played positive roles in improving the WRCC.

Research on Urban Smart Water Resources Emergency Management

2013 ◽  
Vol 409-410 ◽  
pp. 75-78 ◽  
Author(s):  
Tian Yu ◽  
Ming Xiang Yang ◽  
Yun Zhong Jiang
Keyword(s):  
Water Resources ◽  
Emergency Management ◽  
News Media ◽  
Environmental Protection Agency ◽  
Rapid Development ◽  
Health Agency ◽  
Scientific Management ◽  
Urban Water ◽  
Emergency Plan ◽  
Smart Water

In the background of global climate change, the risk caused by natural disaster further intensify, the features of sudden, abnormity and unpredictability of disasters appear to be greater. Emergency management is the important measures to promote formation the operation mechanism and ability of forecasting and early warning, rapid response, comprehensive monitoring, scientific judgment and efficient disposal. In the background of the rapid development of new generation information technology, this paper embarked from urban water resource emergency management, the connotation of urban water affairs emergency management was proposed, and in detail set out urban smart water resources scientific management, which integrated smart emergency prevention, smart emergency perception, smart emergency location, smart emergency simulation, smart emergency warning, smart emergency forecast, smart emergency plan management, smart emergency regulation and smart emergency consultation all in one, and urban smart water resources emergency coordinated management, which integrated water authority, the weather agency, health agency, bureau of parks and woods, the environmental protection agency and the news media all in one, provide support for scientific emergency management of urban water resources.

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