scholarly journals Study on the Construction of Water Environment Promotion Joint Control and Joint Regulation System in Plain River Network Area

2021 ◽  
Vol 668 (1) ◽  
pp. 012038
Author(s):  
Chen Xie ◽  
Xiaobao Pan ◽  
Rui Ding ◽  
Guoqing Liu ◽  
Yang Liu
Keyword(s):  
Water Environment ◽  
River Network ◽  
Regulation System ◽  
Joint Control ◽  
Network Area

River System Connectivity Analysis of Wuxi’s Central Urban Area Based on Graph Theory

2012 ◽  
Vol 212-213 ◽  
pp. 543-548 ◽  
Author(s):  
Liu Yan Wang ◽  
You Peng Xu ◽  
Ming Jing Yu
Keyword(s):  
Graph Theory ◽  
Urban Area ◽  
Water Environment ◽  
River System ◽  
Yangtze River Delta ◽  
River Network ◽  
Structure Stability ◽  
Network Graph ◽  
Stream Structure ◽  
Wuxi City

Wuxi City is located in the hinterland of Taihu Basin and an important city in Yangtze River Delta Region with a prosperous economy. In the process of urban development, the river system pattern changes a lot. It has an impact on water environment, water ecology and other fields. The central urban area of Wuxi City was selected as the study area. Based on the river system of three periods: 1960s, 1980s and 2009, the rivers were classified into three levels according to the width of channels. The length, acreage and stream structure parameters were calculated. Then from the view of Graph Theory, river system was expressed as network graph, and the vertices, edges and degree of vertices were analyzed. The results show that the changes of rivers of different levels and lakes are not completely the same, but still appear a decreasing trend in general. The river network density and water surface ratio become smaller. Also the complexity and structure stability of river network weaken. The conclusions that the river evolution tends to be trunk and single, the stream structure is simplified and the connectivity of rivers and lakes reduces are verified by the analysis based on Graph Theory as well.

scholarly journals Characteristics and Influencing Factors of Spatial Differentiation of Urban Black and Odorous Waters in China

2018 ◽  
Vol 10 (12) ◽  
pp. 4747 ◽  
Author(s):  
Guolei Chen ◽  
Jing Luo ◽  
Chunyan Zhang ◽  
Liang Jiang ◽  
Lingling Tian ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Sewage Treatment ◽  
Water Environment ◽  
Spatial Differentiation ◽  
Urban Pollution ◽  
Influential Factors ◽  
Joint Control ◽  
Chinese Government ◽  
Analysis Tool ◽  
Gradient Distribution

The pollution problem caused by urban black and odorous waters has received much attention from the Chinese government. Our research aims at systematically identifying the characteristics and the influential factors of spatial differentiation of urban black and odorous waters across China. The research, based on the data of black and odorous waters from 2100 Chinese cities, was conducted with the spatial analysis tool of ArcGIS. We found that the amount of Chinese urban black and odorous waters varied in spatial distribution, which was an agglomerated type with significant agglomeration. The kernel density was characterized by independent single kernel centers with ribbon-like and sporadic distributions of subcenters. The cold and hot spots showed a gradient distribution pattern of cold in the southwest and hot in the central east. These spatial distribution characteristics could be attributed to the following core factors, total wastewater discharge, length of urban drainage pipelines, municipal solid waste collection, daily urban sewage treatment capacity, and investment in urban pollution treatment of wastewater. The findings reveal the current geospatial distribution of black and odorous waters pollution and provide reference for the Chinese government to treat the pollution from several key points. Lastly, it is suggested that the Chinese government should establish joint control, joint prevention, and joint treatment mechanisms in the black and odorous waters areas and improve the safety standards of the whole water environment, so as to promote the treatment and elimination of urban black and odorous waters.

Water Pollutant Control for a River-Lake Region to the Northwest of Lake Taihu

2014 ◽  
Vol 665 ◽  
pp. 420-425
Author(s):  
Hua Wang ◽  
Feng Qiang Ji ◽  
Yi Yi Zhou ◽  
Kun Xia
Keyword(s):  
Water Quality ◽  
Lake Taihu ◽  
Water Environment ◽  
Reduction Rate ◽  
Control Unit ◽  
Research Area ◽  
River Network ◽  
Lake Region ◽  
Total Amount Control ◽  
Frequent Exchange

In this paper, Zhushan Bay watershed to the northwest of Lake Taihu was selected as the research area. Taking the developed river-lake connectivity and frequent exchange of pollutants into consideration, we put forward a calculation method of water environment carrying capacity (WECC) for river network based on multiple objectives of water quality reaching standard in river environment function zones and control sections, concentration profile constraint of sewage outlet. According to the proposed method, we calculated the watershed WECC, assigned to each control unit, and quantitatively analyzed the reductions and reduction rate of pollutants under the condition of total amount of each pollutant of control unit reach water quality standards. The results showed that: The pollution loads of each pollutant in Zhushan Bay watershed were greater than WECC. The reduction of COD, NH3-N, TN and TP is 834.4 tons, 226.1 tons, 724.8 tons and 108.9 tons, and the reduction rate of COD, NH3-N, TN and TP is 13.8%, 36.5%, 55.2% and 73.4%, respectively. This paper plays a guiding role in the research of total amount control of river network in Zhushan Bay watershed, and provides important references for total amount control of similar river-lake region.

Analysis of Water Diversion Way and Suitable Discharge Based on Water Environment Improvement Goal in the River Network

2013 ◽  
Vol 779-780 ◽  
pp. 1588-1591
Author(s):  
Wen Xue He ◽  
Cha Qing Li ◽  
Dong Yun Chen
Keyword(s):  
Water Environment ◽  
Focus Of Attention ◽  
River Network ◽  
The Self ◽  
Water Diversion ◽  
River Networks ◽  
Hydraulic Characteristics

One of the direct and effective ways to improve water environment of the river network is water diversion, because of the complex and changing about the river network, the safety of water diversion and the effect to improve water environment have been become the focus of attention. Through the analysis of diversion way and suitable discharge based on water environment improvement goal in the river network, the reasonable interval of the suitable discharge has been defined in the intermittent water diversion and continuous water diversion, the effect to improve the water environment has been further clarified, it is closely related with the water diversion way and discharge, the hydraulic characteristics of river networks should been emphasized to maximum, the self-purification capacity of river networks should be improved, the effectiveness for water diversion to improve the water environment must be continually strengthened.

scholarly journals Key Technologies and Equipment for Contaminated Surface/Groundwater Environment in the Rural River Network Area of China: Integrated Remediation

2020 ◽  
Author(s):  
Han Wang ◽  
Tianbei Wang ◽  
Gang Xue ◽  
Jiang Zhao ◽  
Weiwu Ma ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Gross National Product ◽  
Eastern China ◽  
River Network ◽  
Ecological Environment ◽  
Republic Of China ◽  
Groundwater Environment ◽  
Key Technologies ◽  
Economic Revitalization ◽  
Network Area

Abstract In eastern China, the rural river network area (RRNA) is an anthropic active area characterized by its rapid economic development and high gross national product. However, the water environmental pollution in these areas is increasingly severe, which has greatly hindered its sustainable development. Especially, the frequent interactions between surface/groundwater (SW-GW) have intensified the pollution migration and transformation in RRNA. Therefore, an integrated remediation in rural river network area project (IR-RRNA) has been launched, funded by the Ministry of Science and Technology of the People’s Republic of China, to realize the integrated remediation of SW/GW and soil in RRNA. The IR-RRNA (2019–2022) will apply the related interdisciplinary and methodological knowledge to elucidate the transportation and transformation of pollutants in water and soil during SW-GW interaction, and develop key remediation technologies of surface water, groundwater, and soil suitable for the RRNA. By this way, we attempt to realize the remediation technologies integration for surface/groundwater and soil in RRNA and implementing application demonstration. Meanwhile, a technical guideline will be compiled for the integrated remediation suitable for the RRNA. This project is conducive to addressing the urgent environmental problems of RRNA, and promoting the rural economic revitalization and ecological environment optimization.

scholarly journals Water Environmental Capacity Calculated Based on Point and Non-Point Source Pollution Emission Intensity under Water Quality Assurance Rates in a Tidal River Network Area

2019 ◽  
Vol 16 (3) ◽  
pp. 428 ◽  
Author(s):  
Lina Chen ◽  
Longxi Han ◽  
Junyi Tan ◽  
Mengtian Zhou ◽  
Mingyuan Sun ◽  
...  
Keyword(s):  
Water Quality ◽  
Emission Intensity ◽  
River Network ◽  
Point Sources ◽  
Tidal River ◽  
Source Control ◽  
Concentration Change ◽  
Control Section ◽  
Network Area ◽  
Tidal River Network

A mathematical model for simulating hydrodynamics and pollutants migration in a tidal river network was constructed, which takes the temporal and spatial distribution of rainfall runoff and non-point pollutants into consideration. Under the design hydrologic conditions of a typical hydrological year, the daily concentration change process for the control section is obtained. Aiming at the uncertainty of hydrology and water quality parameters such as flow direction, flow rate and concentration change in tidal river network area, a statistical analysis method is used to obtain the maximum allowable concentration of pollutants in the control section under the condition of the water quality standard assurance rate of. Then, a formula for calculating the pollutions emission intensity of point and non-point sources is derived. The method was applied to the pollution source control in a typical region like Taihu in China.

scholarly journals Study on Calculation Method of Water Resources Supply and Demand Balance in Plain River Network Area

2018 ◽  
Vol 153 ◽  
pp. 062057 ◽  
Author(s):  
Xia Wu ◽  
Liu Lu Guang ◽  
Zhang Zu Lian ◽  
Guan Hong Lin ◽  
Dong Wei ◽  
...  
Keyword(s):  
Water Resources ◽  
Calculation Method ◽  
Supply And Demand ◽  
River Network ◽  
Network Area
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