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Impacts of Reforestation on Stabilization of Riverine Water Levels in South Korea

Kim, Tae Jong / Yoon, Jaehyun / Baak, Saangjoon / Seo,Min Young

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Abstract

We investigate how reforestation contributed to stabilization of riverine water levels in South Korea. For the purpose, we estimate an equation capturing dynamic relationships among rainfall, upstream-area tree stock, and downstream water levels in three river systems of Hongcheon, Mangyeong, and Hyeongsan, using daily observations of precipitation and water levels for the period from 1985 to 2005. Simulation based on estimation results shows that increase in the tree stock in a river basin leads to a significantly suppressed peaking in riverine water levels in response to an abrupt and concentrated rain in the upstream area. For instance, an hour-long concentration of 100mm rain results in 0.7m rise in water level if the volume of growing stock is 1 million m3, whereas the rise in water level stays below 0.27m with 5 million m3in the growingstock volume.

Issue Date
2022-11
Publisher
한국개발연구원
Keywords(Author)
Reforestation; Forest Management; Ecosystem Services; Flood Control; Sustainability
DOI
10.23895/kdijep.2022.44.4.1
Journal Title
KDI Journal of Economic Policy
Start Page
1
End Page
24
ISSN
2586-2995
Language
English
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