scholarly journals Research on Control Method of Pollutant Total Amount of Water Quality based on Fuzzy Mathematics

2020 ◽  
Vol 24 (2) ◽  
pp. 191-199
Author(s):  
Rui Liu
Keyword(s):  
Water Quality ◽  
Control Method ◽  
Comprehensive Evaluation ◽  
Water Environment ◽  
Pollution Source ◽  
Source Control ◽  
Fuzzy Mathematics ◽  
Quality Model ◽  
Control Framework ◽  
Pollutant Discharge

With the increase of pollutants discharged into the water, it is difficult to control the water environment pollution via reducing part of pollutant discharge. Therefore, the control method of pollutant total amount of water quality based on fuzzy mathematics is proposed. Firstly, a control framework and process of the pollutant total amount was built. The total amount of pollutant discharged into this region was controlled within a certain amount to achieve the predetermined environmental objective. Then, water pollution of different regions was evaluated via water quality model based on the fuzzy mathematics in the region or key protection domain with severe pollution and a concentrated pollution source, which makes the comprehensive evaluation of the water quality pollution more scientific. Finally, the control of pollutant total amount was completed via the optimized combination of point source control and unit control of total amount. Experimental results show that the method is scientific, objective and reasonable during controlling the pollutant discharge. It controls the pollutant total amount excellently.

Methods for Calculation of Water Environment Capacity of Small and Medium River Channels

2012 ◽  
Vol 610-613 ◽  
pp. 2745-2750 ◽  
Author(s):  
Long Xi Han ◽  
Fen Fen Yan ◽  
Hui Peng ◽  
Jun Jie Gao ◽  
Man Man Pan
Keyword(s):  
Water Quality ◽  
Water Resources ◽  
Water Environment ◽  
Pollution Source ◽  
River Channels ◽  
Quality Model ◽  
Environment Capacity ◽  
Water Resources Protection ◽  
Water Environment Capacity ◽  
Capacity Method

Methods for calculation of water environment capacity can be divided into two types in general, one type is ideal water environment capacity method and the other is pollution source generalization method. This paper proposes another way of generalization, uniform generalization method, assuming that distribution of the amount of pollutants discharged is uniform in the lengthways direction. In consideration of the practical demand for administration of water resources protection, a formula for calculation of water environment capacity for different combinations of environment function regions is presented，based on the water quality targets of function regions, with the numerical or analytical methods of 1-D water quality model. The proposed method provides a simple and effective method for water resources management and planning.

scholarly journals Computer Intelligent Evaluation Model of Jining Water Quality by Fuzzy Mathematics and Intelligent Computing

2021 ◽  
Vol 2083 (3) ◽  
pp. 032005
Author(s):  
Xiao Huang ◽  
Linlong Jiang ◽  
Caixing Jin
Keyword(s):  
Water Quality ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Water Environment ◽  
Distribution Area ◽  
Fuzzy Mathematics ◽  
Intelligent Computing ◽  
Environment Quality

Abstract This study uses fuzzy mathematics comprehensive evaluation method to evaluate the water environment quality of Jining City and summarize the spatial distribution of water pollutants. The results of the research show: (1) The pollution of surface waters in Jining City is relatively serious. The water quality of rivers is mostly Grade V. The pollution of lakes is relatively low. The overall pollution of reservoirs is relatively light. (2) The concentration distribution area of each pollutant is roughly in a “V” shape. The most polluted areas mainly occur in the Beijing-Hangzhou Canal, Old Canal and other places. The water environment quality in the eastern mountainous and hilly area is better.

Research on Water Environmental Capacity of Urban River: A Case Study of Tuohe River in Suzhou City, Northern Anhui Province

2011 ◽  
Vol 356-360 ◽  
pp. 867-870 ◽  
Author(s):  
Shu Ling Huang ◽  
Yong Zhang ◽  
Qi Li ◽  
Dong Sheng Xu
Keyword(s):  
Water Quality ◽  
Water Environment ◽  
Design Procedure ◽  
River Pollution ◽  
Pollution Source ◽  
Residual Water ◽  
Environmental Capacity ◽  
Quality Model ◽  
Water Environmental Capacity ◽  
Current Water

Water environmental capacity is an important base for making the river pollution control, weakening the pollution source and realizing the water-function target. Analyses on the present situation of water quality in Suzhou reach of Tuohe River are conducted. The hydrological characteristics, the contamination characteristics and the water environment status were investigated. Combined with the design procedure of the water environment capacity, one-dimensional water quality model was selected to calculate and analyze the water environmental capacity of Tuohe River. The results showed that the water environmental capacity of BOD5 is 1231.16t/a, CODCr is 4289.73t/a and NH3-N is 377.3t/a. The current water quality of Tuohe River was good in general, most of the river’s sections have residual water environmental capacity and it is necessary to carry out total pollution reduction plans (especially for COD) in future with the population growth and socio-economic development.

scholarly journals Assessment of Water Quality Profile Using Numerical Modeling Approach in Major Climate Classes of Asia

2018 ◽  
Vol 15 (10) ◽  
pp. 2258 ◽  
Author(s):  
Muhammad Mazhar Iqbal ◽  
Muhammad Shoaib ◽  
Hafiz Umar Farid ◽  
Jung Lyul Lee
Keyword(s):  
Water Quality ◽  
Water Environment ◽  
Oxygen Demand ◽  
Surface Water Quality ◽  
Water Quality Model ◽  
Oxygen Solubility ◽  
Quality Model ◽  
Spatial Profile ◽  
Climatic Regions ◽  
Model Predictions

A river water quality spatial profile has a diverse pattern of variation over different climatic regions. To comprehend this phenomenon, our study evaluated the spatial scale variation of the Water Quality Index (WQI). The study was carried out over four main climatic classes in Asia based on the Koppen-Geiger climate classification system: tropical, temperate, cold, and arid. The one-dimensional surface water quality model, QUAL2Kw was selected and compared for water quality simulations. Calibration and validation were separately performed for the model predictions over different climate classes. The accuracy of the water quality model was assessed using different statistical analyses. The spatial profile of WQI was calculated using model predictions based on dissolved oxygen (DO), biological oxygen demand (BOD), nitrate (NO3), and pH. The results showed that there is a smaller longitudinal variation of WQI in the cold climatic regions than other regions, which does not change the status of WQI. Streams from arid, temperate, and tropical climatic regions show a decreasing trend of DO with respect to the longitudinal profiles of main river flows. Since this study found that each climate zone has the different impact on DO dynamics such as reaeration rate, reoxygenation, and oxygen solubility. The outcomes obtained in this study are expected to provide the impetus for developing a strategy for the viable improvement of the water environment.

scholarly journals Assessing carrying capacity of receiving water bodies – A case study in Southern waterways of Binh Duong province

2019 ◽  
Vol 2 (6) ◽  
pp. 84-97
Author(s):  
Le Ngoc Tuan ◽  
Tao Manh Quan ◽  
Tran Thi Thuy ◽  
Doan Thanh Huy ◽  
Tran Xuan Hoang
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Carrying Capacity ◽  
Water Quality Management ◽  
Pollution Source ◽  
Water Bodies ◽  
Source Control ◽  
Local Pollution ◽  
Surface Water Management ◽  
Receiving Water

The carrying capacity of receiving water bodies is one of the important data for water quality management, pollution source control towards harmonizing with the economic development and environment protection. Therefore, this research aimed atevaluating the carrying capacity of receiving water bodies in the south of Binh Duong province up to 2030. 06 key water quality indicators (COD, BOD, TSS, PO43--P, NO3--N, NH4+-N) were exmained with 02 wastewater treatment scenarios. Results showed the investigated area hardly had carrying capacity for NH4+-N and PO43--P, followed by TSS, BOD, and COD. In case of improving wastewater treatment status till 2030, the carrying capacity of receiving water bodies would be increased, but not significant. The carrying capacity of several basins needs to be paid special attention are: Suoi Con 1 basin (BOD, COD, NH4+-N), Suoi Cai basin (BOD, TSS and NH4+-N), the upstream of Cay Bang – Cau Dinh basin (BOD, COD, TSS, NH4+-N), the upstream of Chom Sao – Rach Bung basin (05 parameters, excepting NO3--N), the upstream of Binh Hoa – Vinh Binh basin (BOD, COD, PO43--P, NH4+-N). These findings are an important basis for formulating strategies and proposing measures for local pollution source control and surface water management.  

Quantifying the impact of human activities on water quality based on spatialization of social data: a case study of the Pingzhai Reservoir Basin

2020 ◽  
Vol 20 (2) ◽  
pp. 688-699 ◽  
Author(s):  
Yongrong Zhang ◽  
Zhongfa Zhou ◽  
Haotian Zhang ◽  
Yusheng Dan
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Human Activities ◽  
Water Environment ◽  
Oxygen Demand ◽  
Pollution Source ◽  
Pollution Load ◽  
Social Data ◽  
Reservoir Basin ◽  
The Impact

Abstract In water pollution source research, it is difficult to quantify the impact of human activities on water quality. Based on pollution load theory and the concept of spatialization of social data, this study integrates land-use type, slope gradient, and spatial position, and uses the contribution of human activities to quantify the impact of farmland fertilizers, livestock and poultry wastes, and human domestic pollution on water quality in the study area. The results show that livestock manure is the largest source of total phosphorus (TP) and total nitrogen (TN) discharges in the research area, and domestic pollution is the largest source of chemical oxygen demand (COD) discharges. The total equal standard pollution load (as well as the load of each pollution source and its pollutant amount) is the highest in the Nayong River Basin and the lowest in the Baishui River Basin. The contributions of human activities to TP and TN have similar spatial distributions. The impact of human activities on COD discharge is minimal. The quantitative results of this model are basically consistent with the actual conditions in the Pingzhai Reservoir Basin, which suggests that the model reasonably reflects the impact of human activities on the water environment of the basin.

Water Quality Evaluation Research Based on Fuzzy Mathematics in Weihe

2014 ◽  
Vol 587-589 ◽  
pp. 869-872
Author(s):  
Ying Dong ◽  
Jian Hua Zhou ◽  
Xi Jun Wu
Keyword(s):  
Water Quality ◽  
Quality Evaluation ◽  
Comprehensive Evaluation ◽  
Evaluation Research ◽  
Shaanxi Province ◽  
Fuzzy Mathematics ◽  
Water Quality Evaluation ◽  
Class V ◽  
Pollution Levels ◽  
Autumn And Winter

Weihe is the largest river in Shaanxi province. The comprehensive evaluation of the monitoring datas in 2012 in Weihe Tongguan drawbridge section was presented in this paper by using the FCE method. The results showed that the water quality pollution levels in this section are Class V, I, IV and V respectively in the four quarters which are spring, summer, autumn and winter, the main pollutant is NH3-N. Compared with the traditional method of single factor assessment, this method can reflect the water quality more comprehensively and reasonably.

Fuzzy Mathematics Applied to Heavy Metal Pollution in the Marine Environment, the Calculation of Water Quality Assessment - A Case Study of Lianyungang Marine

2011 ◽  
Vol 356-360 ◽  
pp. 2124-2130
Author(s):  
Wen Bin Chen
Keyword(s):  
Water Quality ◽  
Heavy Metal ◽  
Environmental Pollution ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Comprehensive Evaluation ◽  
Standard Form ◽  
Fuzzy Comprehensive Evaluation ◽  
Fuzzy Mathematics ◽  
Membership Matrix

Reference fuzzy mathematics of fuzzy comprehensive evaluation method, Select a representative indicator of pollutants to establish fuzzy comprehensive evaluation index system to evaluate the virulence of Lianyungang marine heavy metal pollution levels; by the monitoring data to establish indicators of each factor on the degree of membership at all levels of the standard form a membership matrix, then make the weight factor multiplied by the membership matrix, get the fuzzy product, obtain a comprehensive evaluation set which indicating that water quality standards for water quality at all levels of membership level, reflecting the ambiguity of comprehensive water quality level, then based on the message obtain the integrated environmental pollution of Lianyungang Marine, provide the scientific basis of environmental pollution control for Lianyungang Marine.

Water Quality Evaluation Based on Fuzzy Mathematics in Groundwater Resource Area of SuoLuoShu in Shan Dong Provence

2013 ◽  
Vol 838-841 ◽  
pp. 1768-1771
Author(s):  
Ya Hong Zhou ◽  
Gang Li Hao ◽  
Kang Chen ◽  
Jun Feng Li
Keyword(s):  
Water Quality ◽  
Nitrate Nitrogen ◽  
Comprehensive Evaluation ◽  
Quality Standard ◽  
Evaluation Index System ◽  
Fuzzy Mathematics ◽  
Total Hardness ◽  
Local Pollution ◽  
Groundwater Samples ◽  
Three Samples

Based on the theory of membership degree and comprehensive evaluation in the Fuzzy mathematics, 15 groundwater samples form SuoLuoShu water resource were collected and assessed. Through the analysis of water quality and the local pollution characteristics, chloride, sulfate, nitrate nitrogen, total dissolved solids, total hardness were selected to be the evaluation index system. And the value of the corresponding indexes of 5 grades in the national water quality standard was the comprehensive evaluation level in this study. On this basis, the membership degrees of the groundwater samples in the 5 grades were calculated and by using the maximum membership principle, the groundwater grade of each samples were determined. The results show that the groundwater quality in this area is better generally. 80% of the samples measure up the standard of grade III and the three samples beyond it were all caused by the nitrate nitrogen pollution which was brought by human activities.

Research on Establishing Monitoring Index System of Pollution Source in Puhe Basin

2014 ◽  
Vol 641-642 ◽  
pp. 1159-1162
Author(s):  
Di Wang ◽  
Kun You ◽  
Jin Xiang Fu ◽  
Si Peng Cao
Keyword(s):  
Monitoring System ◽  
Comprehensive Evaluation ◽  
Thermal Power ◽  
Water Environment ◽  
Ammonia Nitrogen ◽  
Pollution Source ◽  
Pollution Monitoring ◽  
Volatile Phenol ◽  
Construct System ◽  
Selection Of

Scientific and reasonable monitoring indexes are the key to establish monitoring system. Based on the single index, it is essential to launch the optimization and selection of indicators. Take thermal power as the research object in demonstration area and adopt comprehensive evaluation and three parameters evaluation methods to select index, successfully construct system of monitoring indicators which include in COD, suspended solids, sulfur, oil, volatile phenol and ammonia nitrogen. It will provide theoretical basis and technical support to build intelligent water environment safety and pollution monitoring system.

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