1. 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
- Author
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Kyung-Sok Min, Kyoung Hoon Chu, Jae-Hwan Ahn, Sang Leen Yun, Kwang Baik Ko, and Chul Yong Um
- Subjects
Pollution ,Pollutant ,Hydrology ,geography ,geography.geographical_feature_category ,media_common.quotation_subject ,Drainage basin ,Environmental engineering ,Greenhouse ,Ocean Engineering ,Point source pollution ,Total nitrogen ,Environmental science ,Water Science and Technology ,media_common - Abstract
Cultivated lands within the river district are likely non-point sources of pollution that could be directly discharged into rivers and lakes, as well as identified as significantly risky areas for pollutant run-off during floods. In this study, major non-point sources in surface run-offs, from cultivated lands within the river districts, and their effects on the bodies of water in North Han River Basin were examined. It was found that pollutant concentrations in the run-offs from farms appeared to be generally higher than in the run-offs from paddies. Initial concentrations of pollutants during rainy seasons were usually higher than the medians of their concentration ranges, though not necessarily the highest. The unit loads of BOD from cultivated lands within river districts, which were proposed in this study for the first time in Korea, were 4.56, 3.35, and 10.26 kg/km2/year for paddies, farms, and greenhouses, respectively. Likewise the unit loads of total nitrogen (TN) were proposed as 1.54, 8...
- Published
- 2014
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