Faradila, Delia Hazna and Ir. Moh. Sholichin, MT., Ph.D., IPM., ASEAN. Eng. and Dr. Eng. Tri Budi Prayogo, ST., MT. (2024) Analisis Pemetaan Daerah Rawan Banjir DAS Gembong Menggunakan Metode Weighted Overlay. Sarjana thesis, Universitas Brawijaya.
Abstract
DAS Gembong mempunyai peranan penting bagi masyarakat Kabupaten Pasuruan karena berpengaruh dalam ketersediaan air bersih dan suplai air irigasi, namun saat penghujan berpotensi banjir dan tanah longsor sehingga mengganggu aktivitas warga. Studi ini bertujuan untuk membuat peta kerawanan banjir pada DAS Gembong. Pemrograman dilakukan menggunakan metode Weighted Overlay. Data yang digunakan berupa data batas DAS, data hujan, peta tutupan lahan, peta kedalaman tanah, data DEM, dan peta jenis tanah dalam menentukan besar nilai skor dan bobot kemudian dilakukan pengolahan data untuk parameter curah hujan, tata guna lahan, kemiringan tanah, jenis tanah, kedalaman tanah, dan zona buffer sungai. Pengolahan data menggunakan ArcGIS memperoleh hasil data curah hujan sebesar 43.958%, kemiringan tanah 45.317%, tata guna lahan 70.347%, jenis tanah 81.51%, kedalaman tanah 57.75%, dan jarak buffer sungai 20.685%. Pemetaan dengan metode Weighted Overlay diperoleh hasil tingkat kerawanan aman 0.236% seluas 0.141 km2 , kurang aman 26.857% seluas 16.035 km2 , rawan 67.769% seluas 40.461 km2 , dan sangat rawan 5.137% seluas 3.067 km2 .
English Abstract
The Gembong watershed has an important role for the people of Pasuruan Regency because it affects the availability of clean water and irrigation water supply, but during the rainy season it has the potential for flooding and landslides to disrupt residents' activities. This study aims to create a map of flood vulnerability in the Gembong watershed. Programming is done using the Weighted Overlay method. The data used are watershed boundary data, rainfall data, land cover map, soil depth map, DEM data, and soil type map in determining the value of scores and weights then data processing is carried out for rainfall parameters, land use, slope, soil type, soil depth, and river buffer zone. Data processing using ArcGIS obtained rainfall data results of 43.958%, land slope 45.317%, land use 70.347%, soil type 81.51%, soil depth 57.75%, and river buffer distance 20.685%. Mapping with the Weighted Overlay method resulted in a safe vulnerability level of 0.236% covering 0.141 km2, less safe 26.857% covering 16.035 km2, prone 67.769% covering 40.461 km2, and very prone 5.137% covering 3.067 km2.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 0524070144 |
| Uncontrolled Keywords: | kerawanan banjir, pemetaan, Weighted Overlay, DAS Gembong, ArcGIS |
| Divisions: | Fakultas Teknik > Teknik Pengairan |
| Depositing User: | Unnamed user with username nova |
| Date Deposited: | 24 Jun 2024 04:34 |
| Last Modified: | 24 Jun 2024 04:34 |
| URI: | http://repository.ub.ac.id/id/eprint/221682 |
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Text (DALAM MASA EMBARGO)
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