Journal ArticleDOI
Risk assessment of non-point source pollution based on landscape pattern in the Hanjiang River basin, China.
TLDR
Wang et al. as mentioned in this paper analyzed the contribution of the source-sink landscape to NPS pollution through the location-weighted landscape contrast index, and they used the pollution risk index to identify and evaluate the regional non-point source pollution risk considering the slope, cost distance, soil erosion, and precipitation erosion affect migration of pollutants.Abstract:
Non-point source (NPS) pollution has become a vital contaminant source affecting the water environment because of its wide distribution, hydrodynamic complexity, and difficulty in prevention and control. In this study, the identification and evaluation of NPS pollution risk based on landscape pattern were carried out in the Hanjiang River basin above Ankang hydrological section, Shaanxi province, China. Landscape distribution information was obtained through land use data, analyzing the contribution of “source-sink” landscape to NPS pollution through the location-weighted landscape contrast index. Using the NPS pollution risk index to identify and evaluate the regional NPS pollution risk considering the slope, cost distance, soil erosion, and precipitation erosion affect migration of pollutants. The results showed that (i) the pollution risk was generally high in the whole watershed, and the sub-watersheds dominated by “source” landscapes account for 74.61% of the whole basin; (ii) the high-risk areas were distributed in the central, eastern, and western regions of the river basin; the extremely high-risk areas accounted for 12.7% of the whole watershed; and the southern and northern regions were dominated by forestland and grassland with little pollution risk; (iii) “source” landscapes were mostly distributed in areas close to the river course, which had a great impact on environment, and the landscape pattern units near the water body needed to be further adjusted to reduce the influence of NPS pollution.read more
Citations
More filters
Journal ArticleDOI
A framework to assess spatio-temporal variations of potential non-point source pollution risk for future land-use planning
TL;DR: In this article , a framework which couples the modified potential non-point pollution indicator (PNPI) model with the future land-use simulation (FLUS) model was developed and applied for assessing the spatio-temporal variations of NSP risk caused by both historical and possible future land use change in a rapidly urbanized basin (i.e., the upper Beiyun River basin, Beijing) during 1980-2030).
Journal ArticleDOI
An improved minimum cumulative resistance model for risk assessment of agricultural non-point source pollution in the coastal zone
TL;DR: In this paper , a new minimum cumulative resistance to agricultural non-point source pollution (AGNPSP-MCR) model is proposed to simulate the transport process of cropland NPSP into the sea based on the "source sink" theory in landscape ecology.
Journal ArticleDOI
An improved minimum cumulative resistance model for risk assessment of agricultural non-point source pollution in the coastal zone.
Chong Huang,Xiangjun Hou,He Li +2 more
TL;DR: In this paper , a new minimum cumulative resistance to agricultural non-point source pollution (AGNPSP-MCR) model is proposed to simulate the transport process of cropland NPSP into the sea based on the "source sink" theory in landscape ecology.
Journal ArticleDOI
Spatial and temporal evolution of the “source–sink” risk pattern of NPS pollution in the upper reaches of Erhai Lake Basin under land use changes in 2005–2020
Journal ArticleDOI
Nonpoint Source Pollution in Plot-Scale and Small Watershed Studies under Natural Rainfall: An Analysis of the China Experience
TL;DR: Wang et al. as discussed by the authors focused on the analysis of the characteristics of NPS between the runoff plot and small watershed and found that with the rainfall and surface runoff, the nutrient concentration increased first and then decreased, and the highest occurred in the first half of the whole rainfall process.
References
More filters
Journal ArticleDOI
Correlation analysis between the spatial characteristics of land use/cover-landscape pattern and surface-water quality in the Ebinur Lake area
Journal Article
Identification of critical source areas: an efficient way for agricultural non-point source pollution control
TL;DR: Current research progresses related to CSAs identification, both in China and in the world, were reviewed with a purpose to boom the application of this efficient water quality management strategy.
Journal ArticleDOI
[Regulation framework of watershed landscape pattern for non-point source pollution control based on 'source-sink' theory: A case study in the watershed of Maluan Bay, Xiamen City, China]
TL;DR: A regulation framework of watershed landscape pattern for non-point source pollution control was developed at two levels based on 'source-sink' theory, and key 'source' landscape was taken as the focus of regulation and optimization.
Journal Article
The Conceptual Framework of Watershed Landscape Optimization Concerning Water Environmental Protection
TL;DR: In this article, a conceptual framework for landscape pattern optimization concerning water environmental protection is proposed, which mainly considers the feasible usage of 'Source' and 'Sink' landscape with spatial differences as optimization rules.
Journal ArticleDOI
基于“源-汇”景观的饮用水源地非点源污染风险遥感识别与评价
TL;DR: For example, this article reported that 76.28% of the users' responses were negative. But they did not specify the reasons for their negative responses. And they also did not report any positive responses.