Development and application of SATEEC L module for slope length adjustment based on topography change

Hyunwoo Kang, Ki Sung Kim, Younshik Park, Nam Won Kim, Yongsik Ok, Jonggun Kim, Yun Ho Choi, Kyoung Jae Lim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Severe sediment-laden problem has been the hot issue in Korea. It was assumed that agricultural activities and landslides were the primary causes of these problems in watersheds. The USLE-based systems have been widely used in soil erosion studies. However the GIS-based USLE modeling system has limitation in estimating USLE L factors at a watershed scale. In this study, the SATEEC L module was developed to reflect the slope length segmentations in the fields. The SATEEC L module was applied to the study watershed to analyze the effects of using the SATEEC L module on estimated sediment. As shown in the comparisons between SATEEC estimated sediment with SWAT values, the SATEEC GA-SDR module derives the SDR with reasonably acceptable accuracies. However, it is worthy to note that the soil erosion using the SATEEC L module for the study watershed was lower than that without using the SATEEC L module by 25%, although the SATEEC estimated sediment values with and without using L module match the SWAT sediment values with similar accuracies (over/under estimation). This is because the SATEEC GA-SDR module estimates lower SDR in case of greater soil erosion estimation without the L module and greater SDR in case of lower soil erosion estimation with the L module. This indicates that the SATEEC input parameters, especially L factor, need to be prepared with care for accurate estimation of SDR at a watershed scale and for accurate evaluation of BMPs in the watershed.

Original languageEnglish
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2010, ASABE 2010
PublisherAmerican Society of Agricultural and Biological Engineers
Pages33-42
Number of pages10
ISBN (Print)9781617388354
Publication statusPublished - 2010 Jan 1

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2010, ASABE 2010
Volume1

Keywords

  • Field slope length
  • LS
  • SATEEC
  • Soil erosion
  • USLE

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)

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  • Cite this

    Kang, H., Kim, K. S., Park, Y., Kim, N. W., Ok, Y., Kim, J., Choi, Y. H., & Lim, K. J. (2010). Development and application of SATEEC L module for slope length adjustment based on topography change. In American Society of Agricultural and Biological Engineers Annual International Meeting 2010, ASABE 2010 (pp. 33-42). (American Society of Agricultural and Biological Engineers Annual International Meeting 2010, ASABE 2010; Vol. 1). American Society of Agricultural and Biological Engineers.