EROSIVITAS HUJAN DI DAS BEDOG BOLS TAHUN 1984 -1994 (Studi Kasus di Provinsi DIY)

• Main Authors: , DWI SUMAN KUNCORO, , Drs. Tukidal Yunianto, M. Si.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/125139/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=65304
• Institution: Universitas Gadjah Mada

Erosivity Research conducted in the Bedog watershed which is a sub Progo watershed located in the eastern of Yogyakarta province. The research objective is to calculate the value of erosivity using Bols formula that will be used to calculate the amount of erosion in the study area. Bols formula is one of the many formulas which is used to calculate erosivity value in Java and Bali. The input data which is being used for the application of the erosivity value in the form of rainfall erosivity, the average of rainfall data, average of rainy days and the average of rainfall in 24 hours. The data is used to find the value of El30 at each station rain tool for 11 years from 1984 -1994. The results of this research in order to calculate the erosivity using Bols formula shows variaty from year to year. Highest value obtained in 1989 amounted to 5819.58 mm / ha / year is located on the slope of Merapi, Dadapan station. Based on the result, it makes the value of erosivity is high, the urban areas to the south will have changing its rainfall intensivity. The result of the erosivity calculation will be used to create Isoeroden map. The map will be a comparison of rainfall from year 1984 -1994 using the contour lines of precipitation.