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All Journal GEA, Jurnal Pendidikan Geografi Journal of Geosciences and Environmental Studies
Tjahyanityasa, Wanda Fitri
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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.
Strategies for Handling the Poor Culture of Slum Communities, in Kenjeran Sub-district, Surabaya City Tjahyanityasa, Wanda Fitri; Marwasta, Djaka; Harini, Rika
Journal of Geosciences and Environmental Studies Vol. 2 No. 2 (2025): July
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53697/ijgaes.v2i2.3872

Abstract

Land use in the North Surabaya City area can still be found in the presence of slums, one of the sub-districts where this phenomenon occurs is in the Kenjeran District. Migration that continues to increase significantly can cause various problems in a residential area. This research aims to formulate a strategy for handling the distribution of slums based on poor culture in the Kenjeran Sub-district. Javanese and Madurese ethnic communities inhabit the majority of the Kenjeran Sub-district. The research used a descriptive qualitative method with SWOT analysis to handle the poor cultural characteristics of slum communities. Data collection from respondents through observation, questionnaires, interviews, and documentation. The unit of analysis in this research is a grouping of people in slums. The population in this study was 7,208 poor people in the Kenjeran Subdistrict. Still, in this study there were 99 respondents consisting of five community groupings, namely fishermen clusters with poor cultural traits of resignation to fate, apathy, dependence, and kinship traits, fishmonger clusters with poor cultural traits of apathy, dependence and kinship traits, culinary clusters with poor cultural traits of apathy and dependence traits, clusters with poor cultural traits of apathy and dependence traits, clusters with poor cultural traits of apathy, and clusters with poor cultural traits of kinship. Artisans with poor cultural traits of resignation to fate and dependency, and tourist attraction clusters with poor cultural traits of dependency.
Co-Authors Amelia Fitri Arysandi, Safira Arum Djaka Marwasta Djati Mardiatno Febriani, Yenni 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