Analysis system for regional environmental status to support environmental assessment : establishing an assessment framework for watershed health in Nakdong river basin
- Author Park, Jongyoon
- Researchers Chun, Dongjun
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Date
2020-12-31
Ⅰ. Introduction
1. Background Park and Lee (2018).
o The evaluation elements in terms of the water environment for a large-scale land development plan in environmental impact assessment (EIA) are composed of stable water supply, water quality, and ecosystem conservation. When conducting EIA, a strategy to prepare reduction measures according to the current status of the river and the results of the impact prediction, which is an approach of the linear concept centering on rivers, is used.
ㅇ The evaluation system for the water environment has limitations in considering the cumulative impact of development and water environment conservation measures in terms of watershed management. Especially, its importance is evaluated as low in areas where the water system is not developed. Water quantity and quality are also evaluated separately despite their being a hydrologically linked problem.
ㅇ Due to widespread land developments, many healthy watersheds are degrading with the corresponding reduction in vegetation along with the changes in physical and hydrological soil properties that are attributable to soil erosion and water pollution in rivers and water storage facilities
oConsequently, water environment impact should be evaluated at a watershed scale. This means that an integrated assessment framework that takes into account the watershed attributes such as land-use, ecosystem, and water quantity and quality need to be established.
2. Purpose of this study
o The overall goal of this study is to assess watershed health by examining the natural environment, hydrology, water q
1. Background Park and Lee (2018).
o The evaluation elements in terms of the water environment for a large-scale land development plan in environmental impact assessment (EIA) are composed of stable water supply, water quality, and ecosystem conservation. When conducting EIA, a strategy to prepare reduction measures according to the current status of the river and the results of the impact prediction, which is an approach of the linear concept centering on rivers, is used.
ㅇ The evaluation system for the water environment has limitations in considering the cumulative impact of development and water environment conservation measures in terms of watershed management. Especially, its importance is evaluated as low in areas where the water system is not developed. Water quantity and quality are also evaluated separately despite their being a hydrologically linked problem.
ㅇ Due to widespread land developments, many healthy watersheds are degrading with the corresponding reduction in vegetation along with the changes in physical and hydrological soil properties that are attributable to soil erosion and water pollution in rivers and water storage facilities
oConsequently, water environment impact should be evaluated at a watershed scale. This means that an integrated assessment framework that takes into account the watershed attributes such as land-use, ecosystem, and water quantity and quality need to be established.
2. Purpose of this study
o The overall goal of this study is to assess watershed health by examining the natural environment, hydrology, water q