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All Journal GEA, Jurnal Pendidikan Geografi Journal of Geosciences and Environmental Studies
Febriani, Yenni
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Astronomy Earth & Planetary Sciences Education Energy Environmental Science Social Sciences

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Flood Assessment through Integrated-Mixed-Method in the Western Downstream Area of Citanduy River Basin, Pangandaran Regency Syafitri, Dyah Rina; Arysandi, Safira Arum; Purboyo, Alvian Aji; Fitri, Amelia; Febriani, Yenni; Tjahyanityasa, Wanda Fitri; Sari, Nila Puspita; Mar'ath, Sitti Khafifatul; Safinatunnajah, Safinatunnajah; Satyaningrum, Aghnia Candra; Rahardjo, Noorhadi; Sudrajat, Sudrajat; Mardiatno, Djati; Rachmawati, Rini
Jurnal Pendidikan Geografi Gea Vol 24, No 1 (2024)
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/gea.v24i1.60691

Abstract

Recurring and intensive flooding occurs in the western downstream area of the Citanduy River Basin (including Kalipucang, Padaherang, and Mangunjaya Districts, Pangandaran Regency) and causes massive losses. Land use Changes, fluctuating weather and climate conditions, as well as countermeasures that have not been maximized, have caused losses continuously. This study aims to describe the latest representation of flood vulnerability distribution in the study area using an integrated-mixed-method, includes: 1) AHP weighting based on expert interviews; 2) land use classification by the random forest algorithm; 3) Flood Hazard Map modeling using weighted overlay; and 4) hazard maps validation and historical flood analysis. The flood vulnerability model uses indicators: rainfall, elevation, slopes, distance from the river, and land use. Geographic Information System based on application (ArcGIS) and could (GEE) are the analytical tools in this study, supported by secondary data, such as 1) Sentinel 2A for land use models, 2) DEM for elevation and slope models, 3) buffer models for river distance and 4) CHIRPS for rainfall. The flood hazard with low and very-low levels is so minimal that it is less visible on the map. While the moderate level of flood hazard class counted as 12.6 Ha, mostly located in the eastern part of the study area (Padaherang and Kalipucang sub-districts).The high-level flood hazard class occupied about 2041.17 Ha, spread over built-up land use. The Very-high hazard class is 22652.11 Ha and mostly located in villages directly adjacent to the Citanduy River.
Soil Damage Control Techniques Based on Local Wisdom in Sumberbrantas Village, Batu City Febriani, Yenni; Santosa, Langgeng Wahyu; Harini, Rika
Journal of Geosciences and Environmental Studies Vol. 2 No. 1 (2025): March
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53697/ijgaes.v2i1.3553

Abstract

Sumberbrantas village faces potential soil damage due to agricultural intensification for biomass production on sloping land with high erosion rates. The importance of soil conservation through the local wisdom approach encourages this research to explore soil damage control techniques the local community applies. This study aims to identify local wisdom-based soil conservation techniques applied in land management for biomass production. The methods used included structured interviews with 90 respondents who work as farmers/gardeners, followed by field observations and documentation to collect primary data on community characteristics, land use, and conservation techniques. The results showed that the community applied conservation techniques in crop rotation, intercropping, and terracing as the primary efforts to reduce soil damage. Organic fertilizers, simple technologies such as hoeing, mechanical methods in the form of rolling terraces, and vegetative methods in the form of ground cover plants are also commonly applied. Most communities have gained this knowledge from generation to generation and through regular counseling. Land management based on community wisdom in Sumberbrantas Village effectively maintains land productivity while preserving the environment. These techniques reflect the community's adaptation to environmental challenges, with the potential to be further developed through modern innovations and local traditions.
Co-Authors Amelia Fitri Arysandi, Safira Arum Djati Mardiatno Langgeng Wahyu Santosa Mar'ath, Sitti Khafifatul Noorhadi Rahardjo Purboyo, Alvian Aji Rika Harini Rini Rachmawati Safinatunnajah, Safinatunnajah Sari, Nila Puspita Satyaningrum, Aghnia Candra Sudrajat Sudrajat Syafitri, Dyah Rina Tjahyanityasa, Wanda Fitri