Kabupaten Bulukumba merupakan daerah yang berpotensi mengalami bencana gempa bumi karena adanya aktivitas sesar walanae di dataran Bulukumba. Penelitian ini bertujuan mengetahui (1) gambaran struktur geologi pada daerah penelitian dan (2) keberadaan zona sesar dan gambaran struktur bawah permukaan berdasarkan metode geolistrik pada daerah penelitian. Identifikasi awal kenampakan sesar di daerah penelitian dimulai dengan analisis citra dari Google Earth, pengamatan lapangan terhadap pencirian sesar, kemudian dilakukan pengukuran menggunakan metode geolistrik resistivitas konfigurasi Wenner-Schlumberger untuk mendapatkan nilai tahanan jenis untuk setiap perlapisan batuan di bawah permukaan. Pengukuran dilakukan pada dua lintasan yang berbeda dengan panjang lintasan masing-masing 300 m dan jarak antar elektroda sebesar 5 m. Data-data yang diperoleh kemudian diolah dan diinterpretasikan untuk menarik kesimpulan hasil penelitian. Hasil penelitian menunjukkan bahwa terdapat aktivitas sesar di daerah penelitian yang ditandai dengan terbentuknya lembah Sungai Bijawang, penurunan bidang daratan yang membentuk bidang horst dan graben serta adanya pembelokan yang cukup tajam pada alur sungai dan gawir sesar yang terdapat di sepanjang lembah pada jalur sungai tersebut. Selain itu, berdasarkan hasil pengolahan data geolistrik resistivitas disimpulan bahwa terdapat zona sesar di daerah penelitian berdasarkan interpretasi penampang 2D dari data hasil inversi nilai resistivitas, dimana struktur perlapisan batuan antara lintasan 1 dan lintasan 2 memiliki karakteristik yang identik sehingga mengindikasikan keterdapatan aktivitas sesar mendatar yang telah memisahkan kedua bidang tersebut. Struktur perlapisan tanah di daerah penelitian di dominasi oleh lapisan lempung berpasir dengan nilai tahanan jenis berkisar antara 100 - 400 Ωm dan 10 – 200 Ωm.Kata Kunci: zona sesar; geolistrik; struktur geologi.
In Indonesia, nearly seven million children under five are stunted and throughout the world, Indonesia is the country with the fifth-highest stunting prevalence. South Sulawesi ranks fourth with a high stunting potential in Indonesia. Stunting is caused by multi-dimensional factors and not only due to malnutrition experienced by pregnant women and children under five. In more detail, several factors that cause stunting are the effects of poor care, the lack of household/family access to nutritious food, and the lack of access to clean water and sanitation. In addition to maternal characteristics and parenting, the problem of stunting is also influenced by environmental factors and geographical conditions (population density, climatic conditions, and inadequate sanitation) so the spatial analysis is important to do in overcoming this problem. In spatial data, often observations at a location (space) depend on observations at other locations that are nearby (neighboring). By using Geographically Weighted Regression (GWR) obtained variables that affect the prevalence of stunting in South Sulawesi Province, including the percentage of babies receiving vitamin A intake, the percentage of babies receiving exclusive breastfeeding, the percentage of babies receiving health care, the percentage of malnourished children under five, the percentage short toddlers, the percentage of infants receiving DPT-HB-Hib, Measles and BCG immunizations. for the GWR model is 81.32% and based on variables that are significant to the prevalence of stunting in South Sulawesi Province, three clusters are formed.
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