Soil erosion risk in Korean watersheds, assessed using the revised universal soil loss equation

Soyoung Park, Cheyoung Oh, Seong Woo Jeon, Huicheul Jung, Chuluong Choi

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

Soil erosion reduces crop productivity and water storage capacity, and, both directly and indirectly, causes water pollution. Loss of soil has become a problem worldwide, and as concerns about the environment grow, active research has begun regarding soil erosion and soil-preservation policies. This study analyzed the amount of soil loss in South Korea over a recent 20-year period and estimated future soil loss in 2020 using the revised universal soil loss equation (RUSLE). Digital elevation (DEM) data, detailed soil maps, and land cover maps were used as primary data, and geographic information system (GIS) and remote sensing (RS) techniques were applied to produce thematic maps, based on RUSLE factors. Using the frequency ratio (FR), analytic hierarchy process (AHP), and logistic regression (LR) approaches, land suitability index (LSI) maps were developed for 2020, considering the already established Environmental Conservation Value Assessment Map (ECVAM) for Korea. Assuming a similar urban growth trend and 10-, 50-, and 100-year rainfall frequencies, soil loss in 2020 was predicted by analyzing changes in the cover-management factor and rainfall-runoff erosivity factor. In the period 1985-2005, soil loss showed an increasing trend, from 17.1. Mg/ha in 1985 to 17.4. Mg/ha in 1995, and to 20.0. Mg/ha in 2005; the 2005 value represents a 2.8. Mg/ha (16.6%) increase, compared with 1985 and is attributable to the increased area of grassland and bare land. In 2020, the estimated soil loss, considering the ECVAM, was 19.2-19.3. Mg/ha for the 10-year rainfall frequency, 36.4-36.6. Mg/ha for the 50-year rainfall frequency, and 45.7-46.0. Mg/ha for the 100-year rainfall frequency. Without considering the ECVAM, the amount of soil loss was about 0.4-1.6. Mg/ha larger than estimates that did consider the ECVAM; specifically, the values were 19.6-19.9. Mg/ha for the 10-year rainfall frequency, 37.1-37.8. Mg/ha for the 50-year frequency, and 46.7-47.5. Mg/ha for the 100-year frequency. In 2010, without considering the ECVAM, the soil loss was 0.3-1.8. Mg/ha more than that estimated when considering the ECVAM. These results indicate that if urban areas are developed such that they damage areas of high value, as defined environmentally and legislatively, the amount of soil loss will increase, whereas if such areas are preserved, erosion will decrease slightly. Thus, when planning urban development, the environmental and legislative value of preservation should be considered to minimize erosion and allow for more sustainable development.

Original languageEnglish
Pages (from-to)263-273
Number of pages11
JournalJournal of Hydrology
Volume399
Issue number3-4
DOIs
Publication statusPublished - 2011 Mar 18

Fingerprint

Revised Universal Soil Loss Equation
soil erosion
watershed
soil
rainfall
erosion
loss
erosivity
urban growth
water storage
water pollution
urban development
digital elevation model
environmental conservation
logistics
land cover
sustainable development
urban area
grassland
runoff

Keywords

  • Analytic hierarchy process
  • Environmental Conservation Value Assessment Map
  • Frequency ratio
  • Logistic regression
  • Soil erosion

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Soil erosion risk in Korean watersheds, assessed using the revised universal soil loss equation. / Park, Soyoung; Oh, Cheyoung; Jeon, Seong Woo; Jung, Huicheul; Choi, Chuluong.

In: Journal of Hydrology, Vol. 399, No. 3-4, 18.03.2011, p. 263-273.

Research output: Contribution to journalArticle

Park, Soyoung ; Oh, Cheyoung ; Jeon, Seong Woo ; Jung, Huicheul ; Choi, Chuluong. / Soil erosion risk in Korean watersheds, assessed using the revised universal soil loss equation. In: Journal of Hydrology. 2011 ; Vol. 399, No. 3-4. pp. 263-273.
@article{e327ec74b4a24597b3126fc5b5e9ca63,
title = "Soil erosion risk in Korean watersheds, assessed using the revised universal soil loss equation",
abstract = "Soil erosion reduces crop productivity and water storage capacity, and, both directly and indirectly, causes water pollution. Loss of soil has become a problem worldwide, and as concerns about the environment grow, active research has begun regarding soil erosion and soil-preservation policies. This study analyzed the amount of soil loss in South Korea over a recent 20-year period and estimated future soil loss in 2020 using the revised universal soil loss equation (RUSLE). Digital elevation (DEM) data, detailed soil maps, and land cover maps were used as primary data, and geographic information system (GIS) and remote sensing (RS) techniques were applied to produce thematic maps, based on RUSLE factors. Using the frequency ratio (FR), analytic hierarchy process (AHP), and logistic regression (LR) approaches, land suitability index (LSI) maps were developed for 2020, considering the already established Environmental Conservation Value Assessment Map (ECVAM) for Korea. Assuming a similar urban growth trend and 10-, 50-, and 100-year rainfall frequencies, soil loss in 2020 was predicted by analyzing changes in the cover-management factor and rainfall-runoff erosivity factor. In the period 1985-2005, soil loss showed an increasing trend, from 17.1. Mg/ha in 1985 to 17.4. Mg/ha in 1995, and to 20.0. Mg/ha in 2005; the 2005 value represents a 2.8. Mg/ha (16.6{\%}) increase, compared with 1985 and is attributable to the increased area of grassland and bare land. In 2020, the estimated soil loss, considering the ECVAM, was 19.2-19.3. Mg/ha for the 10-year rainfall frequency, 36.4-36.6. Mg/ha for the 50-year rainfall frequency, and 45.7-46.0. Mg/ha for the 100-year rainfall frequency. Without considering the ECVAM, the amount of soil loss was about 0.4-1.6. Mg/ha larger than estimates that did consider the ECVAM; specifically, the values were 19.6-19.9. Mg/ha for the 10-year rainfall frequency, 37.1-37.8. Mg/ha for the 50-year frequency, and 46.7-47.5. Mg/ha for the 100-year frequency. In 2010, without considering the ECVAM, the soil loss was 0.3-1.8. Mg/ha more than that estimated when considering the ECVAM. These results indicate that if urban areas are developed such that they damage areas of high value, as defined environmentally and legislatively, the amount of soil loss will increase, whereas if such areas are preserved, erosion will decrease slightly. Thus, when planning urban development, the environmental and legislative value of preservation should be considered to minimize erosion and allow for more sustainable development.",
keywords = "Analytic hierarchy process, Environmental Conservation Value Assessment Map, Frequency ratio, Logistic regression, Soil erosion",
author = "Soyoung Park and Cheyoung Oh and Jeon, {Seong Woo} and Huicheul Jung and Chuluong Choi",
year = "2011",
month = "3",
day = "18",
doi = "10.1016/j.jhydrol.2011.01.004",
language = "English",
volume = "399",
pages = "263--273",
journal = "Journal of Hydrology",
issn = "0022-1694",
publisher = "Elsevier",
number = "3-4",

}

TY - JOUR

T1 - Soil erosion risk in Korean watersheds, assessed using the revised universal soil loss equation

AU - Park, Soyoung

AU - Oh, Cheyoung

AU - Jeon, Seong Woo

AU - Jung, Huicheul

AU - Choi, Chuluong

PY - 2011/3/18

Y1 - 2011/3/18

N2 - Soil erosion reduces crop productivity and water storage capacity, and, both directly and indirectly, causes water pollution. Loss of soil has become a problem worldwide, and as concerns about the environment grow, active research has begun regarding soil erosion and soil-preservation policies. This study analyzed the amount of soil loss in South Korea over a recent 20-year period and estimated future soil loss in 2020 using the revised universal soil loss equation (RUSLE). Digital elevation (DEM) data, detailed soil maps, and land cover maps were used as primary data, and geographic information system (GIS) and remote sensing (RS) techniques were applied to produce thematic maps, based on RUSLE factors. Using the frequency ratio (FR), analytic hierarchy process (AHP), and logistic regression (LR) approaches, land suitability index (LSI) maps were developed for 2020, considering the already established Environmental Conservation Value Assessment Map (ECVAM) for Korea. Assuming a similar urban growth trend and 10-, 50-, and 100-year rainfall frequencies, soil loss in 2020 was predicted by analyzing changes in the cover-management factor and rainfall-runoff erosivity factor. In the period 1985-2005, soil loss showed an increasing trend, from 17.1. Mg/ha in 1985 to 17.4. Mg/ha in 1995, and to 20.0. Mg/ha in 2005; the 2005 value represents a 2.8. Mg/ha (16.6%) increase, compared with 1985 and is attributable to the increased area of grassland and bare land. In 2020, the estimated soil loss, considering the ECVAM, was 19.2-19.3. Mg/ha for the 10-year rainfall frequency, 36.4-36.6. Mg/ha for the 50-year rainfall frequency, and 45.7-46.0. Mg/ha for the 100-year rainfall frequency. Without considering the ECVAM, the amount of soil loss was about 0.4-1.6. Mg/ha larger than estimates that did consider the ECVAM; specifically, the values were 19.6-19.9. Mg/ha for the 10-year rainfall frequency, 37.1-37.8. Mg/ha for the 50-year frequency, and 46.7-47.5. Mg/ha for the 100-year frequency. In 2010, without considering the ECVAM, the soil loss was 0.3-1.8. Mg/ha more than that estimated when considering the ECVAM. These results indicate that if urban areas are developed such that they damage areas of high value, as defined environmentally and legislatively, the amount of soil loss will increase, whereas if such areas are preserved, erosion will decrease slightly. Thus, when planning urban development, the environmental and legislative value of preservation should be considered to minimize erosion and allow for more sustainable development.

AB - Soil erosion reduces crop productivity and water storage capacity, and, both directly and indirectly, causes water pollution. Loss of soil has become a problem worldwide, and as concerns about the environment grow, active research has begun regarding soil erosion and soil-preservation policies. This study analyzed the amount of soil loss in South Korea over a recent 20-year period and estimated future soil loss in 2020 using the revised universal soil loss equation (RUSLE). Digital elevation (DEM) data, detailed soil maps, and land cover maps were used as primary data, and geographic information system (GIS) and remote sensing (RS) techniques were applied to produce thematic maps, based on RUSLE factors. Using the frequency ratio (FR), analytic hierarchy process (AHP), and logistic regression (LR) approaches, land suitability index (LSI) maps were developed for 2020, considering the already established Environmental Conservation Value Assessment Map (ECVAM) for Korea. Assuming a similar urban growth trend and 10-, 50-, and 100-year rainfall frequencies, soil loss in 2020 was predicted by analyzing changes in the cover-management factor and rainfall-runoff erosivity factor. In the period 1985-2005, soil loss showed an increasing trend, from 17.1. Mg/ha in 1985 to 17.4. Mg/ha in 1995, and to 20.0. Mg/ha in 2005; the 2005 value represents a 2.8. Mg/ha (16.6%) increase, compared with 1985 and is attributable to the increased area of grassland and bare land. In 2020, the estimated soil loss, considering the ECVAM, was 19.2-19.3. Mg/ha for the 10-year rainfall frequency, 36.4-36.6. Mg/ha for the 50-year rainfall frequency, and 45.7-46.0. Mg/ha for the 100-year rainfall frequency. Without considering the ECVAM, the amount of soil loss was about 0.4-1.6. Mg/ha larger than estimates that did consider the ECVAM; specifically, the values were 19.6-19.9. Mg/ha for the 10-year rainfall frequency, 37.1-37.8. Mg/ha for the 50-year frequency, and 46.7-47.5. Mg/ha for the 100-year frequency. In 2010, without considering the ECVAM, the soil loss was 0.3-1.8. Mg/ha more than that estimated when considering the ECVAM. These results indicate that if urban areas are developed such that they damage areas of high value, as defined environmentally and legislatively, the amount of soil loss will increase, whereas if such areas are preserved, erosion will decrease slightly. Thus, when planning urban development, the environmental and legislative value of preservation should be considered to minimize erosion and allow for more sustainable development.

KW - Analytic hierarchy process

KW - Environmental Conservation Value Assessment Map

KW - Frequency ratio

KW - Logistic regression

KW - Soil erosion

UR - http://www.scopus.com/inward/record.url?scp=79952002255&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952002255&partnerID=8YFLogxK

U2 - 10.1016/j.jhydrol.2011.01.004

DO - 10.1016/j.jhydrol.2011.01.004

M3 - Article

AN - SCOPUS:79952002255

VL - 399

SP - 263

EP - 273

JO - Journal of Hydrology

JF - Journal of Hydrology

SN - 0022-1694

IS - 3-4

ER -