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Approximation equation of erosion calculation in GIS

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Surface erosion at a watershed scale is often estimated using the Universal Soil Loss Equation (USLE). During the erosion study of Shihmen reservoir watershed in Taiwan, we discovered a longstanding order-of-magnitude discrepancy in the literature. In order to explain the differences in the calculated amounts of erosion, we identified the following equation as one of the possible reasons: Σ ni=1 Σ RiKiLiSiCiPi/n Σni=1Ri/n Σni=1Ki/n Σni=1Li/n Σni=1Si/n Σni=1CRi/n Σni=1Pi/n where R, K, L, S, C, and P are factors of USLE and n is the total number of cells used in GIS. In this study, we showed the derivation of the equation and used numerical simulations to test if the equation held true for Shihmen reservoir watershed.

Original languageEnglish
Title of host publication37th Asian Conference on Remote Sensing, ACRS 2016
PublisherAsian Association on Remote Sensing
Pages1837-1843
Number of pages7
ISBN (Electronic)9781510834613
StatePublished - 2016
Event37th Asian Conference on Remote Sensing, ACRS 2016 - Colombo, Sri Lanka
Duration: 17 Oct 201621 Oct 2016

Publication series

Name37th Asian Conference on Remote Sensing, ACRS 2016
Volume3

Conference

Conference37th Asian Conference on Remote Sensing, ACRS 2016
Country/TerritorySri Lanka
CityColombo
Period17/10/1621/10/16

Keywords

  • Approximation
  • Erosion
  • GIS
  • USLE

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