Identification of Landslide Potential at UNNES Conservation Park Based on Rainfall and Soil Geology Parameters

Abstract

Semarang city has a unique morphology with hilly in the south and lowland in the north area. UNNES Conservation Park as aa study area located at the hilly area has a potential of landslide susceptibility with the various level of slope and the type of soil. Furthermore, in the wet season, high intensity of rainfall in this area be considered as the factor for landslides triggering. This article focused analyse the potential for landslides in the study area. A cross section in north area which has steep slope was taken to be analysed. Comparison the manual method using Fellenius and Bishop and a numerical method for SF computation was applied for landslide potential identification. The results of analysis revealed the SF number was 1.746 with the Fellenius method and 1.786 with the Bishop method. Meanwhile, using the numerical method, the SF number is 1.440-1.471. From the result could be concluded the UNNES Park was categorized as stable class for Fellenius and Bishop method and critical class category for numerical method.