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All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Teknologi Pertanian Andalas
Tjandra, M. Agita
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Agriculture, Biological Sciences & Forestry Computer Science & IT Engineering

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Land Use Scenario Simulation for Erosion Control Using the Universal Soil Loss Equation (USLE) Method in Nagari Lawang, Agam Regency Zawiyah, Zawiyah; Tjandra, M. Agita; Yanti, Delvi
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 1 (2025): February 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i1.262-272

Abstract

Nagari Lawang is located in Agam Regency, West Sumatra, which is a nagari situated in the highlands with a slightly steep to very steep slope with the most types of land use in moors/fields. This can directly encourage erosion. This study aims to analyze the optimal land use pattern for reducing the rate of erosion in Nagari Lawang. The method used to calculate the erosion rate is the Universal Soil Loss Equation (USLE) and to obtain the optimal land use in reducing the erosion rate is a simulation with three scenarios. The results of the study showed that 47.29% of the Nagari Lawang land area was at an erosion rate above the tolerance erosion with the category of light to very heavy. Based on land use simulations, planning scenario III by allocating the use of shrubland into mixed gardens with planting according to contour lines and the use of shrub land into mixed forests is the best scenario because it can reduce erosion by 39.05% of the total erosion of Nagari Lawang. The reduction of erosion on the diverted land (moors/fields and shrubs) reached 45.83% of the existing condition, which was 2105.928 tons/ha/year. The best scenario land use can be used as a reference by policy makers and the community in determining appropriate land management actions in Nagari Lawang. Keywords: Erosion, Simulation, Land Use, USLE.
ANALISIS PERUBAHAN KARAKTERISTIK CURAH HUJAN DAN DAMPAKNYA TERHADAP MUSIM TANAM PADI DI KECAMATAN KOTO TANGAH KOTA PADANG Tjandra, M. Agita; Yanti, Delvi; Zawiyah
Jurnal Teknologi Pertanian Andalas Vol 29 No 2 (2025)
Publisher : Universitas Andalas

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Abstract

Climate change affects rainfall patterns, causing shifts in the onset of seasons that impact water resource availability, thereby disrupting crop growth, yields and agricultural production. Rainfall variability, both spatially and temporally, can lead to changes in the planting and harvesting seasons of crops, which in turn affect the food security of a region. The objectives of this study were to identify rainfall characteristics in Koto Tangah District, identify the rice planting season in Koto Tangah District, and analyze the effect of changes in rainfall characteristics on the rice planting season in Koto Tangah District. The research employs a combination of quantitative and qualitative methods, presented in a descriptive and explanatory manner. The analysis to observe changes in rainfall characteristics was conducted over three periods: quarterly, semi-annualiy, and annually. The rainfall characteristics analyzed were minimun, maximum, average and total rainfall. After analyzing rainfall characteristics, changes in rainfall characteristics were integrated with the rice planting season in Koto Tangah District, Padang City. Based on the analysis results, it was conducted that there were changes in rainfall characteristics in Koto Tangah District, Padang City, however farmers did not use rainfall as the primary reference for determining the rice planting time. Koto Tangah District already has a good technical irrigation network, enabling it to provide water for rice fields throughout the year. In addition to being supported by good technical irrigation, Koto Tangah District has relatively high rainfall every year. Therefore, changes in rainfall characteristics do not affect the rice planting season in Koto Tangah District.
Co-Authors Yanti, Delvi Zawiyah Zawiyah, Zawiyah