Evaluation of nitrate contamination sources of unconfined groundwater in the North Han River basin of Korea using nitrogen isotope ratios

2002 ◽  
Vol 6 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Woo-Jung Choi ◽  
Gwang-Hyun Han ◽  
Hee-Myong Ro ◽  
Sun-Ho Yoo ◽  
Sang-Mo Lee
Keyword(s):  
River Basin ◽  
Nitrogen Isotope ◽  
Isotope Ratios ◽  
Nitrate Contamination ◽  
Han River ◽  
Contamination Sources ◽  
The North ◽  
Han River Basin

Non-point sources of pollution from cultivated lands in river districts and their contribution to water bodies along the North Han River Basin in Korea

2014 ◽  
Vol 53 (9) ◽  
pp. 2301-2311 ◽  
Author(s):  
Sang Leen Yun ◽  
Jae Hwan Ahn ◽  
Kyung-Sok Min ◽  
Kyoung Hoon Chu ◽  
Chul Yong Um ◽  
...  
Keyword(s):  
River Basin ◽  
Point Sources ◽  
Water Bodies ◽  
Han River ◽  
The North ◽  
Sources Of Pollution ◽  
Han River Basin

scholarly journals Nitrogen isotope ratios identify nitrate contamination sources

1996 ◽  
Vol 50 (2) ◽  
pp. 32-36 ◽  
Author(s):  
Dennis E. Rolston ◽  
Graham E. Fogg ◽  
David L. Decker ◽  
Dianne T. Louie ◽  
Mark E. Grismer
Keyword(s):  
Nitrogen Isotope ◽  
Isotope Ratios ◽  
Nitrate Contamination ◽  
Contamination Sources

scholarly journals Pollutant Load Characteristics from a Small Mountainous Agricultural Watershed in the North Han River Basin

2005 ◽  
Vol 47 (6) ◽  
pp. 83-92 ◽  
Author(s):  
Yong-Chul Shin ◽  
Joong-Dae Choi ◽  
Kyoung-Jae Lim ◽  
Hyeok-Ho Shim ◽  
Chang-Won Lyou ◽  
...  
Keyword(s):  
River Basin ◽  
Agricultural Watershed ◽  
Pollutant Load ◽  
Han River ◽  
The North ◽  
Han River Basin ◽  
Load Characteristics

scholarly journals Spatiotemporal Evolution of Landscape Ecological Risk Based on Geomorphological Regionalization during 1980–2017: A Case Study of Shaanxi Province, China

2020 ◽  
Vol 12 (3) ◽  
pp. 941
Author(s):  
Di Liu ◽  
Hai Chen ◽  
Hang Zhang ◽  
Tianwei Geng ◽  
Qinqin Shi
Keyword(s):  
River Basin ◽  
Ecological Risk ◽  
Land Surface ◽  
Risk Model ◽  
Shaanxi Province ◽  
Regional Differentiation ◽  
Ecological Risks ◽  
Han River ◽  
Han River Basin ◽  
Landscape Ecological

Land surface elements, such as land use, are in constant change and dynamically balanced, driving changes in global ecological processes and forming the regional differentiation of surface landscapes, which causes many ecological risks under multiple sources of stress. The landscape pattern index can quickly identify the disturbance caused by the vulnerability of the ecosystem itself, thus providing an effective method to support the spatial heterogeneity of landscape ecological risk. A landscape ecological risk model based on the degree of interference and fragility was constructed and spatiotemporal differentiation of risk between 1980 and 2017 in Shaanxi Province was analyzed. The spatiotemporal migration of risk was demonstrated from the perspective of geomorphological regionalization and risk gravity. Several conclusions were drawn: The risk of Shaanxi Province first increased and then decreased, at the same time, the spatial differentiation of landscape ecological risk was very significant. The ecological risk presented a significant positive correlation but the degree of autocorrelation decreased. The risk of the Qinba Mountains was low and the risk of the Guanzhong Plain and Han River basin was high. The risk of Loess Plateau and sandstorm transition zone decreased greatly and their risk gravities shifted to the southwest. The gravity of the Guanzhong Plain and Qinling Mountains had a northward trend, while the gravity of the Han River basin and Daba Mountains shifted to the southeast. In the analysis of typical regions, there were different relationships between morphological indicators and risk indexes under different geomorphological features. The appropriate engineering measures and landscape management for different geomorphological regionalization were suggested for effective reduction of ecological risks.

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