Assessment of Economic Losses on Agricultural Non-Point Source Pollution by Abuse of Fertilizer in Manasi River Basin of China

2014 ◽  
Vol 1073-1076 ◽  
pp. 484-488
Author(s):  
Zhong Hai Cheng ◽  
Fang Luo

Agricultural Non-point Source (AgNPS) pollution is one of the most important reasons for environmental pollution and unbalance of ecology. Nowadays, the negative impact of AgNPS pollution is increasing. Oasis and desertification exist at the same time in Xinjiang. The evaluation of economic loss caused by AgNPS pollution was carried out in the Manasi River Basin. The economic losses on AgNPS pollution were assessed by the methods of Concentration-Value Curve. Fertilizer overusing were focused on this research,which were major sources of AgNPS pollution. The results showed that environment economic loss caused by abuse of fertilizer was 8.115 million RMB in 2012.

Author(s):  
Xin Zhang ◽  
Lin Zhou ◽  
Yuqi Liu

Changes in landscape patterns in a river basin play a crucial role in the change on load of non-point source pollution. The spatial distribution of various land use types affects the transmission of non-point source pollutants on the basis of source-sink theory in landscape ecology. Jiulong River basin in southeast of China was selected as the study area in this paper. Aiming to analyze the correlation between changing landscape patterns and load of non-point source pollution in this area, traditional landscape metrics and the improved location-weighted landscape contrast index based on the minimum hydrological response unit (HRULCI) were applied in this study, in combination with remote sensing and geographic information system (GIS) technique. The results of the landscape metrics showed the enhanced fragmentation extent and the decreasing polymerization degree of the overall landscape in the watershed. High values of HRULCI were concentrated in cultivated land, while low HRULCI values mostly appeared in forestland, indicating that cultivated land substantially enhanced non-point source pollution, while forestland inhibited the pollution process.


2021 ◽  
Vol 261 ◽  
pp. 04023
Author(s):  
Xu He ◽  
Hou Siyan

The water quality of six important rivers in Haihe River Basin, including Yongding River, Luanhe River, North Canal, Daqing River, South Canal and Chaobai River, was evaluated. The influence of point source and non-point source on water quality was analyzed. The causes of water environmental pollution in the major rivers were preliminarily revealed. The results show that the water quality of Chaobai River is good, and the impact of point source and non-point source discharge on the water body is small. Other rivers are affected by different degrees of point source and non-point source pollution. Based on the analysis results, the engineering measures and management countermeasures for river regulation are put forward.


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