scholarly journals Use of Multivariate Statistical Techniques to Study Spatial Variability and Sources Apportionment of Pollution in Rivers Flowing into the Laizhou Bay in Dongying District

Water ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 772
Author(s):  
Jing Su ◽  
Yanhua Qiu ◽  
Yuling Lu ◽  
Xiaosong Yang ◽  
Songyan Li
Keyword(s):  
Spatial Variability ◽  
Point Source ◽  
Source Apportionment ◽  
Pollution Source ◽  
Domestic Sewage ◽  
Laizhou Bay ◽  
Survey Area ◽  
Point Source Pollution ◽  
Point Pollution ◽  
Mlr Model

Spatial variability and source apportionment of river pollution flowing into the Bohai Sea are of great significance to the pollution liability and development of control strategies to reduce the terrestrial discharge of pollution in the ocean. In this study, ten water quality variables from 14 monitoring sites in rivers flowing into Laizhou Bay were obtained to investigate the spatial variation and pollution sources in Dongying District from 2018–2019. The survey area was divided into a low pollution (LP) zone and a high pollution (HP) zone by cluster analysis based on ten indicators. Principle component analysis/factor analysis with a geographic information system was performed to identify the four main pollution sources in the survey area. Compared with the positive matrix factorization model, the absolute principal component score-multiple linear regression (APCS-MLR) model was more appropriate for the source apportionment of pollution in the surface water of Dongying District. The point source pollution of domestic sewage (23.6%) was the most crucial pollution source of water in the LP zone, followed by non-point pollution from agricultural activity (16.4%). The contribution rate in the HP zone analyzed by the APCS-MLR model followed a decreasing order: point source pollution from domestic sewage (28.5%) > non-point pollution source of overland runoff (14.8%) > point source pollution of hybrid wastewater (12.4%) > point source pollution from industries sewage (10.6%). Therefore, the spatial distribution and sources of pollution in the investigated area should be considered while developing control measures to reduce the discharge of pollution to Laizhou Bay.

Research of Agricultural Non-Point Source Pollution and Prevention Measures

2013 ◽  
Vol 790 ◽  
pp. 445-448
Author(s):  
Pei Pei Shen ◽  
Lu Hua Yang ◽  
Zi Peng Guo ◽  
Hong Chao Liu
Keyword(s):  
Point Source ◽  
Environmental Protection ◽  
Pollution Control ◽  
Pollution Source ◽  
Comprehensive Analysis ◽  
Prevention Measures ◽  
Point Source Pollution ◽  
Non Point Source Pollution

With the effectively control of the point source pollution, non-point source pollution has become the most serious pollution source in our country. In addition, the agricultural non-point source pollution control has become the most important part of the environmental protection. By referring to related journals, this article makes a comprehensive analysis on definition, characteristics, mechanism, harm and prevention countermeasures of agricultural non-point source pollution.

scholarly journals Study on Total Amount Accounting of Pollutants Entering Qinghe River Basin

2021 ◽  
Vol 271 ◽  
pp. 02001
Author(s):  
Han Zhuo ◽  
Zhang Ji ◽  
Su Jialiang ◽  
Zheng Zhiyuan ◽  
Lu Shuaiyu ◽  
...  
Keyword(s):  
Point Source ◽  
Water Quality Monitoring ◽  
Pollution Source ◽  
Quality Monitoring ◽  
Monitoring Data ◽  
Pollution Load ◽  
Point Source Pollution ◽  
Input And Output ◽  
Total Amount Control ◽  
Non Point Source Pollution

The calculation of the total amount of pollutants entering the river is the key to the total amount control system. Since non-point source pollution has not been monitored normally and effectively, based on the principle of the balance of input and output of pollutants, the 2009-2013 Qinghe water quality monitoring data, pollution source survey data and monitoring data were used to establish a binary statistics of the total amount of pollutants model. MATLAB software is used to solve the model. The results show that the model has strong data assimilation ability, can accurately calculate the monthly COD inflow into the river, can divide the point source and non-point source pollution load, and can meet the needs of actual research.

scholarly journals A Comparison Study of Runoff Characteristics of Non-Point Source Pollution from Three Watersheds in South Korea

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 966 ◽  
Author(s):  
Minji Park ◽  
Young Soon Choi ◽  
Hyung Jin Shin ◽  
Inhong Song ◽  
Chun Gyeong Yoon ◽  
...  
Keyword(s):  
Organic Matter ◽  
Land Cover ◽  
Point Source ◽  
Oxygen Demand ◽  
Pollution Monitoring ◽  
First Flush ◽  
Point Source Pollution ◽  
Point Pollution ◽  
Non Point Source Pollution ◽  
Rainy Days

Three watersheds in Korea (Dochoncheon, Gongjicheon, Seolseongcheon) with different land cover characteristics were selected for non-point source pollution monitoring. Event mean concentration (EMC) was calculated, and runoff characteristics were compared through first-flushing and statistical analyses. The mean of the water quality parameters was the highest in Seolseongcheon during dry days among the three watersheds. EMCs of biochemical oxygen demand (BOD) and total nitrogen (TN) were higher in Dochoncheon and Gongjicheon during rainy days, respectively. The upper Seolseongchun watershed showed overall greater values of chemical oxygen demand (COD), suspended solids (SS), total organic carbon (TOC), and total phosphorus (TP). First-flush analyses indicated that SS had the strongest and TN had the weakest effects on the first flush. BOD was the highest in Dochoncheon (urban watershed) and increased with increased number of antecedent dry days. Rainfall intensity appeared to affect SS runoff strongly in Gongjicheon and Seolseongcheon. COD showed strong correlation with SS and TOC in all watersheds, and organic matter (COD and TOC) demonstrated high factor loads during dry and rainy days. Thus, organic matter–related factors were classified as the major factors in pollutant loads. TP and TN were separately classified during dry days in Gongjicheon and Seolseongcheon, whereas these were the secondary factors during rainfall when the influence of non-point pollution was substantial. Cluster analyses showed that the monitoring sites in Dochoncheon and Gongjicheon watersheds were closer than Seolseongcheon. As a result of the comparison of non-point source pollution runoff in the three watersheds, it was difficult to explain the non-point source pollution runoff by specific characteristics such as land cover. For science-based management of non-point pollution, it is necessary to obtain additional survey data considering the climatic, geographical and major industries.

Effect of Hg on Jiaozhou BayWaters – The Change Process of the Hg Pollution Sources

2014 ◽  
Vol 955-959 ◽  
pp. 1443-1447 ◽  
Author(s):  
Dong Fang Yang ◽  
Feng You Wang ◽  
Hua Zhong He ◽  
You Fu Wu ◽  
Si Xi Zhu
Keyword(s):  
Point Source ◽  
River Flow ◽  
Jiaozhou Bay ◽  
Pollution Source ◽  
Pollution Sources ◽  
Ocean Current ◽  
Point Source Pollution ◽  
Stream Discharge ◽  
High Pollution ◽  
Hg Pollution

Based on investigation data in Jiaozhou bay waters from 1979 to 1985(absent of 1984), this paper tried to anylysis the horizontal distributions and pollution sources and characteristics of Hg in Jiaozhou Bay. The results showed that, the horizonal distributions of Hg in surface water of Jiaozhou Bay showed decreasing trends from river flow direct, and the major pollution source of Hg was point source, whose pollutants were transferred by stream discharge. Under the influences of point source pollution, the Hg concentrations in surface waters could range from 0.46-13.04 μg.L-1; while under the influences of ocean current itself, the concentration of Hg in bay mouth area could range from 0.46-13.04 μg.L-1. The pollution sources of Hg in Jiaozhou Bay could be catagoried as two levels as high-pollution sources and non-pollution sources, due to Hg in this bay was mainly impacted by point source. It is necessary to enhance the recovery ratio of Hg, and to reduce the discharge of Hg.

Roles of Rural Contiguous Improvement Measures on the Non-Point Source Pollution Control in Rural Area in China

2014 ◽  
Vol 1030-1032 ◽  
pp. 687-691
Author(s):  
Chong Meng ◽  
Hua Yin ◽  
Fan Li Kong ◽  
Yu Li
Keyword(s):  
Drinking Water ◽  
Point Source ◽  
Water Source ◽  
Pollution Source ◽  
Water Sources ◽  
Living Environment ◽  
Drinking Water Source ◽  
Point Source Pollution ◽  
Rural Living ◽  
Non Point Source Pollution

Nowadays, agricultural non-point source pollution has become the main pollution source of water environment, especially for drinking water. Water sources protection has become a major problem in national economy and people's livelihood. Rural contiguous improvement project, including rural drinking water source protection, rural domestic sewage treatment, rural living garbage and livestock industry pollution treatment, can not only improve rural living environment, but also effectively reduce the non-point source pollution source of the water sources. A case study in north China showed that, after rural contiguous improvement, the amount of pollution source reduced significantly, so as to protect and improve the environmental quality of water source reserve effectively.

Non-point pollution from China's rural areas and its countermeasures

2001 ◽  
Vol 44 (7) ◽  
pp. 123-128 ◽  
Author(s):  
C.-Q. Yin ◽  
C.-F. Yang ◽  
B.-Q. Shan ◽  
G.-B. Li ◽  
D.-L. Wang
Keyword(s):  
Environmental Education ◽  
Point Source ◽  
Constructed Wetlands ◽  
Rural Areas ◽  
Nutrient Load ◽  
Point Source Pollution ◽  
Runoff Water ◽  
Lakes And Reservoirs ◽  
Point Pollution ◽  
Non Point Source Pollution

Most lakes in the eastern part of China are eutrophic and non-point pollution accounts for more than half of the nutrient load to the lakes and reservoirs. Some efforts have been made to reduce the non-point source pollution in the catchments of sensitive water bodies. Technologies for the control of non-point pollution in Chinese rural areas are multipond systems, biogas fermentation, hilly area ecological agriculture, constructed wetlands, ecotone engineering and others. They are effective in the removal of nutrients from the runoff water or reduction of waste, and they are used with multi-purposes. To control non-point pollution, the cooperation with farmers and other residents in the countryside is the key to success, and the program has to consider their benefits. There are still many difficulties with its control, and more efforts are needed to develop suitable technologies and environmental education.

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