Integrated universal soil loss equation (USLE) and Geographical Information System (GIS) for soil erosion estimation in A Sap basin: Central Vietnam

Central Vietnam is very susceptible to soil erosion due to its complicated terrain and heavy rainfall. The objective of this study was to quantify soil erosion in the A Sap river basin, A Luoi district, Thua Thien Hue Province, Vietnam, using the Universal Soil Loss Equation (USLE) and Geographical...

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Published inInternational Soil and Water Conservation Research Vol. 6; no. 2; pp. 99 - 110
Main Authors Pham, Tung Gia, Degener, Jan, Kappas, Martin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2018
KeAi Communications Co., Ltd
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Abstract Central Vietnam is very susceptible to soil erosion due to its complicated terrain and heavy rainfall. The objective of this study was to quantify soil erosion in the A Sap river basin, A Luoi district, Thua Thien Hue Province, Vietnam, using the Universal Soil Loss Equation (USLE) and Geographical Information System (GIS). The results showed that 34% of land area lost accumulated to 10tha−1year−1 while 47% of the total area lost less than 1tha−1year−1. Natural forest land lost the most with an average of about 19tha−1year−1, followed by plantation forest with approximately 7tha−1year−1 and other agricultural lands at 3.70 and 1.45tha−1year−1 for yearly crops and paddy rice, respectively. Soil erosion was most sensitive to the topographic factor (LS), followed by the practice support factor (P), soil erodibility factor (K), cropping management (C), and the rainfall erosivity factor (R). Implications are that changes to the cultivated calendar and implementing intercropping are effective ways to prevent soil erosion in cultivated lands. Furthermore, introducing broad leaves trees for mountainous areas in A Sap basin was the most effective practice in reducing soil erosion. The study also pointed out that the combination of available data sources used with the USLE and GIS technology is a viable option to calculate soil erosion in Central Vietnam, which would allow targeted attention toward a solution is to reduce future soil erosion.
AbstractList Central Vietnam is very susceptible to soil erosion due to its complicated terrain and heavy rainfall. The objective of this study was to quantify soil erosion in the A Sap river basin, A Luoi district, Thua Thien Hue Province, Vietnam, using the Universal Soil Loss Equation (USLE) and Geographical Information System (GIS). The results showed that 34% of land area lost accumulated to 10 t ha−1 year−1 while 47% of the total area lost less than 1 t ha−1 year−1. Natural forest land lost the most with an average of about 19 t ha−1 year−1, followed by plantation forest with approximately 7 t ha−1 year−1 and other agricultural lands at 3.70 and 1.45 t ha−1 year−1 for yearly crops and paddy rice, respectively. Soil erosion was most sensitive to the topographic factor (LS), followed by the practice support factor (P), soil erodibility factor (K), cropping management (C), and the rainfall erosivity factor (R). Implications are that changes to the cultivated calendar and implementing intercropping are effective ways to prevent soil erosion in cultivated lands. Furthermore, introducing broad leaves trees for mountainous areas in A Sap basin was the most effective practice in reducing soil erosion. The study also pointed out that the combination of available data sources used with the USLE and GIS technology is a viable option to calculate soil erosion in Central Vietnam, which would allow targeted attention toward a solution is to reduce future soil erosion. Keywords: Central Vietnam, GIS, Soil erosion, USLE
Central Vietnam is very susceptible to soil erosion due to its complicated terrain and heavy rainfall. The objective of this study was to quantify soil erosion in the A Sap river basin, A Luoi district, Thua Thien Hue Province, Vietnam, using the Universal Soil Loss Equation (USLE) and Geographical Information System (GIS). The results showed that 34% of land area lost accumulated to 10tha⁻¹year⁻¹ while 47% of the total area lost less than 1tha⁻¹year⁻¹. Natural forest land lost the most with an average of about 19tha⁻¹year⁻¹, followed by plantation forest with approximately 7tha⁻¹year⁻¹ and other agricultural lands at 3.70 and 1.45tha⁻¹year⁻¹ for yearly crops and paddy rice, respectively. Soil erosion was most sensitive to the topographic factor (LS), followed by the practice support factor (P), soil erodibility factor (K), cropping management (C), and the rainfall erosivity factor (R). Implications are that changes to the cultivated calendar and implementing intercropping are effective ways to prevent soil erosion in cultivated lands. Furthermore, introducing broad leaves trees for mountainous areas in A Sap basin was the most effective practice in reducing soil erosion. The study also pointed out that the combination of available data sources used with the USLE and GIS technology is a viable option to calculate soil erosion in Central Vietnam, which would allow targeted attention toward a solution is to reduce future soil erosion.
Central Vietnam is very susceptible to soil erosion due to its complicated terrain and heavy rainfall. The objective of this study was to quantify soil erosion in the A Sap river basin, A Luoi district, Thua Thien Hue Province, Vietnam, using the Universal Soil Loss Equation (USLE) and Geographical Information System (GIS). The results showed that 34% of land area lost accumulated to 10tha−1year−1 while 47% of the total area lost less than 1tha−1year−1. Natural forest land lost the most with an average of about 19tha−1year−1, followed by plantation forest with approximately 7tha−1year−1 and other agricultural lands at 3.70 and 1.45tha−1year−1 for yearly crops and paddy rice, respectively. Soil erosion was most sensitive to the topographic factor (LS), followed by the practice support factor (P), soil erodibility factor (K), cropping management (C), and the rainfall erosivity factor (R). Implications are that changes to the cultivated calendar and implementing intercropping are effective ways to prevent soil erosion in cultivated lands. Furthermore, introducing broad leaves trees for mountainous areas in A Sap basin was the most effective practice in reducing soil erosion. The study also pointed out that the combination of available data sources used with the USLE and GIS technology is a viable option to calculate soil erosion in Central Vietnam, which would allow targeted attention toward a solution is to reduce future soil erosion.
Author Degener, Jan
Pham, Tung Gia
Kappas, Martin
Author_xml – sequence: 1
  givenname: Tung Gia
  surname: Pham
  fullname: Pham, Tung Gia
  email: phamgiatung@huaf.edu.vn
  organization: Cartography, GIS and Remote Sensing Department, Göttingen University, Germany
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  givenname: Jan
  surname: Degener
  fullname: Degener, Jan
  organization: Cartography, GIS and Remote Sensing Department, Göttingen University, Germany
– sequence: 3
  givenname: Martin
  surname: Kappas
  fullname: Kappas, Martin
  organization: Cartography, GIS and Remote Sensing Department, Göttingen University, Germany
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Snippet Central Vietnam is very susceptible to soil erosion due to its complicated terrain and heavy rainfall. The objective of this study was to quantify soil erosion...
Central Vietnam is very susceptible to soil erosion due to its complicated terrain and heavy rainfall. The objective of this study was to quantify soil erosion...
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SubjectTerms basins
Central Vietnam
crops
erodibility
forest land
forest plantations
geographic information systems
GIS
intercropping
landscapes
leaves
mountains
rain
rice
Soil erosion
topography
trees
Universal Soil Loss Equation
USLE
Vietnam
water conservation
watersheds
Title Integrated universal soil loss equation (USLE) and Geographical Information System (GIS) for soil erosion estimation in A Sap basin: Central Vietnam
URI https://dx.doi.org/10.1016/j.iswcr.2018.01.001
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