Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Bulletin of Scientific Contribution : Geology Journal of Geosciences and Applied Geology
Ryonaldo Rizqi, Muhammad Ibrahim
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
LANDSLIDE VULNERABILITY ZONE USING ANALYTICAL HIERARCHY PROCESS (AHP) METHOD IN BANYURESMI VILLAGE, SUKASARI DISTRICT, SUMEDANG, WEST JAVA Ryonaldo Rizqi, Muhammad Ibrahim; Iskandarsyah, T. Yan Waliana Muda; Athallah, Muhammad Nabiel Nahensa; Renardi, Raditya Ahmad; Ganjar Gani, Reza Mohammad
Bulletin of Scientific Contribution Vol 24, No 1 (2026): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v24i1.69895

Abstract

Landslides are a common natural disaster in Indonesia, especially in Banyuresmi Village, Sukasari District, Sumedang Regency, which is a research area covering 9.58 . This study aims to identify landslide vulnerability zones using the Analytical Hierarchy Process (AHP) method. This method is used in decision making by compiling a process hierarchy structure, a pairwise comparison matrix, class and subclass weighting analysis, and a consistency ratio (CR) test. The method was applied to evaluate and spatially overlay the controlling factors of landslide vulnerability, namely slope gradient, lithology, aspect (slope direction), land cover, and distance from streams. The results showed that the study area was predominantly classified as having moderate to high vulnerability, with the high vulnerability zone covering 60.94% of the area, the moderate vulnerability zone covering 38.38%, and the low vulnerability zone covering only 0.68%. Slope gradient was identified as the dominant factor, followed by lithology and aspect. Field validation confirmed a strong spatial correlation between the mapped high-risk zones and the actual locations of reported landslides, demonstrating the reliability of the method through field validation. Overall, this study provides a scientific basis and recommendations for land use planning, minimizing the risk of landslides, and mitigation strategies, especially in residential areas in Banyuresmi Village.Keywords: Analytical Hierarchy Process, Banyuresmi, Landslide, Sumedang, Slope
GEOMORPHOLOGICAL ANALYSIS OF THE SUKAMULYA AND SURROUNDINGS AREA, LANGKAPLANCAR AND CIGUGUR DISTRICTS, PANGANDARAN REGENCY, WEST JAVA PROVINCE Ryonaldo Rizqi, Muhammad Ibrahim; Iskandarsyah, T. Yan Waliana Muda
Journal of Geological Sciences and Applied Geology Vol 9, No 2 (2026): Journal of Geological Sciences and Applied Geology
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v9i2.69736

Abstract

Geographically, the Sukamulya and surroundings area, Langkaplancar and Cigugur subdistricts, Pangandaran Regency, West Java Province, are located at 108°30'9.44” E to 108°32'51.343” E and 7°33'42.896” S to 7°36'23.595” S. This study area is located in the South Mountain Zone of West Java, which is characterized by hilly relief and strong tectonic and volcanic influences. This study aims to identify geomorphological conditions and understand their formation processes based on morphographic, morphometric, and morphogenetic approaches. The research methods included spatial analysis or remote sensing using National Digital Elevation Model (DEMNAS) data and validation through geomorphological observations in the field. Several parameters were analyzed, including landform, river flow patterns, slope inclination, lithology, and the influence of geological structures. The results show that the study area is dominated by hills with altitudes between 115 and 436 meters above sea level and slope gradients ranging from 13 to 55%. The drainage patterns that developed were rectangular and subparallel, indicating the control of geological structures and slope inclination on the development of the drainage system. The geomorphological characteristics in the study area were divided into three units, namely the Slightly Steep Structural Hills Unit, the Steep Structural Hills Unit, and the Steep Volcanic Hills Unit. Generally, landscape forming in the study area is controlled by the interaction of endogenous processes such as tectonic activity and volcanism, as well as exogenous processes such as erosion and weathering. This study provides to contribute to the fields of geology and geomorphology, serve as a basis for land use planning, and inform further studies on potential geological hazards such as landslides.
Co-Authors Athallah, Muhammad Nabiel Nahensa Iskandarsyah, T. Yan Waliana Muda Renardi, Raditya Ahmad Reza Mohammad Ganjar Gani