Next Article in Journal
Enhanced Coagulation with Mn(III) Pre-Oxidation for Treatment of Micro-Polluted Raw Water
Previous Article in Journal
Projections of Future Climate Change in Singapore Based on a Multi-Site Multivariate Downscaling Approach
Open AccessArticle

Effects of Forest Thinning on the Long-Term Runoff Changes of Coniferous Forest Plantation

Forest Conservation Department, National Institute of Forest Science, Seoul 02455, Korea
*
Author to whom correspondence should be addressed.
Water 2019, 11(11), 2301; https://doi.org/10.3390/w11112301
Received: 18 September 2019 / Revised: 25 October 2019 / Accepted: 31 October 2019 / Published: 3 November 2019
(This article belongs to the Section Hydrology)
Forests and water are closely related to each other. Thus, forest management is crucial for the sustainable clean water supply. Forest thinning is one of the fundamental forest management practices, as it can change runoff by controlling the density of trees. In this study, the effect of forest thinning on long-term runoff changes was evaluated, based on the long-term rainfall-runoff data of a coniferous plantation forest catchment in Korea. From the double mass curve and Pettitt’s test, a statistically significant increase in runoff rates was identified. A simple linear regression model of the double mass curve can successfully quantify the net effect of forest thinning on the runoff increase. Furthermore, it was also confirmed that forest thinning does not significantly increase the risk of flooding. About ten years after forest thinning, crown closure rates of the coniferous plantation forest reached a level similar to the pre-thinning period, and runoff rates returned to the pre-thinning level, due to forest growth. As a result of this study, a proposed direction for Korea’s forest policy for water resource management is presented for the future.
Keywords: long-term runoff changes; forest thinning; forest management; water yield change; double mass curve; change point detection long-term runoff changes; forest thinning; forest management; water yield change; double mass curve; change point detection
Show Figures

Graphical abstract

MDPI and ACS Style

Yang, H.; Choi, H.T.; Lim, H. Effects of Forest Thinning on the Long-Term Runoff Changes of Coniferous Forest Plantation. Water 2019, 11, 2301.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop