Erosion Prediction and Soil and Water Conservation Scenario Using The SWAT Model

Authors

  • Ni Luh Trisna Candra Dewi Udayana University
  • Ni Nyoman Sulastri Udayana University
  • I Gusti Ketut Arya Arthawan Udayana University
  • Ngadisih Ngadisih Gadjah Mada University

DOI:

https://doi.org/10.23960/jtep-l.v13i1.260-268

Abstract

Increasing population and development has resulted in inappropriate land use within watersheds that increase soil erosion. One of the hydrologic models that can be used to predict erosion and soil and water conservation in a watershed is SWAT. This research was conducted to predict erosion and the guidance of soil and water conservation in the Yeh Empas Watershed. This research was carried out in several stages, including data collection, data analysis and map validation using the ROC (receiver operating characteristic) and AUC (area under curve) methods. Results revealed that Yeh Empas Watershed had a very light EHL (erosion hazard level) category was found in the downstream area with an annual erosion value of 0 − 14.68 t/ha. In the middle area, the EHL was categorized as light with an erosion value of 15.44 − 57.22 t.ha-1.y-1. The upstream area has moderate EHL with a value of 65.20 − 178.64 t.ha-1.y-1. The validation of the EHL map using the ROC method showed a result of 0.83. This value was classified as very good. It can be concluded that SWAT predictions can be used in estimating erosion and soil and water conservation scenario to reduce 85% erosion.

 

Keywords: Erosion prediction, Soil and water conservation scenario, SWAT models, Yeh Empas Watershed.

Author Biographies

  • Ni Luh Trisna Candra Dewi, Udayana University
    Program Study of Agricultural Engineering and Biosystems, Faculty of Agricultural Technology
  • Ni Nyoman Sulastri, Udayana University
    Program Study of Agricultural Engineering and Biosystems, Faculty of Agricultural Technology
  • I Gusti Ketut Arya Arthawan, Udayana University
    Program Study of Agricultural Engineering and Biosystems, Faculty of Agricultural Technology
  • Ngadisih Ngadisih, Gadjah Mada University
    Department of Agricultural Engineering and Biosystems, Faculty of Agricultural Technology, G

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Published

2024-03-02

Issue

Vol. 13 No. 1 (2024): March 2024

Section

Articles

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