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Updated: Jul 4, 2026

Watershed Planning within a Quantitative Scenario Analysis Framework

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

Nonpoint source pollution management for the multipurpose dam watersheds.

¹Policy Research Group, Korea Environment Institute, Eunpyeng-Gu, Seoul, Korea. jychoi@kei.re.kr

Water Science and Technology : a Journal of the International Association on Water Pollution Research

|June 13, 2008

Summary

Highland fields are major nonpoint pollution sources in Korean dams, releasing chemicals and causing erosion. Conservation practices like fallowing, conservative cultivation, and surface restoration on steep slopes are key to managing pollution.

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Area of Science:

Environmental Science
Agricultural Science
Water Resource Management

Background:

Multipurpose dam watersheds in Korea face pollution from various sources, with highland agriculture being a primary contributor.
Nonpoint pollution from highland fields stems from excessive fertilizer/pesticide runoff and soil erosion exacerbated by heavy rainfall.

Purpose of the Study:

To identify main pollution sources in Korean multipurpose dam watersheds.
To evaluate effective management strategies for controlling nonpoint pollution from highland fields.

Main Methods:

Analysis of pollution sources in dam watersheds.
Assessment of agricultural practices for soil protection and runoff minimization.
Evaluation of land management strategies based on slope gradients.

Main Results:

Highland fields identified as the predominant nonpoint pollution source.
Practices such as fallowing, conservative cultivation, and covering are effective for soil protection.
Detour waterways and improved irrigation can reduce runoff impacts.
Prohibiting cultivation and restoring surfaces on slopes ≥15% is more efficient for pollution control.

Conclusions:

Effective management of nonpoint pollution in dam watersheds requires targeted strategies for highland agriculture.
Implementing soil conservation and runoff control measures is crucial.
Site-specific approaches, considering land slope, are necessary for efficient pollution source management.