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All Journal Indonesian Journal of Geography JOURNAL ONLINE OF PHYSICS Indonesian Journal of Environment and Disaster
Koesuma, Sorja
Department of Physics, Sebelas Maret University
Earth & Planetary Sciences Environmental Science Physics

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Groundwater Vulnerability Comparison Using DRASTIC and GOD Methods in Surakarta City Koesuma, Sorja; Ramelan, Ari Handono; Sutarno, Doddy
Indonesian Journal of Geography Vol 56, No 1 (2024): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.87232

Abstract

Demographic growth, urbanization, economic development, agriculture, and consumption per capita have increased the demand for water resources. The population density of Surakarta affects the city’s ability to fulfil its residents’ clean water requirements. As an urban region, Surakarta may be impacted by development activities that degrade the quality and quantity of groundwater. This growing demand should be balanced against effective management of water source regions. This research aims to investigate groundwater vulnerability in Surakarta City. We employed the DRASTIC and GOD methods and compared both results. These methods used the overlay and indexing approaches using GIS based on field data and secondary data such as drill, rainfall, and topographic data. The results of DRASTIC show three types of vulnerability: high (0.21%; 9.87 ha), moderate (94.22%; 4,355.98 ha), and low (5.56%; 257.25 ha), while GOD method results in high (7.03%; 324.96 ha), moderate (52.90%; 2,445.84 ha), low (38.69%; 1,788.81 ha), and negligible (1.37%; 63.49 ha). Based on both methods, we identified Banjarsari district as a location with high groundwater vulnerability. The correlation coefficient between the two methods is 0.511. This value shows that the correlation criteria are acceptable and comparable. This research can be used by local authorities and policymakers to manage groundwater resources. 
The Study of a Contextual Model of People-Centered Inclusive Humanitarian Action: Case Study in Cianjur, West Java and Sigi, Central Sulawesi, Indonesia Koesuma, Sorja; Pelupessy, Dicky C; Mariany, Aria; Paripurno, Eko Teguh; Silvanto, Tri; Purnama, Anton Roy
Indonesian Journal of Environment and Disaster Vol. 3 No. 2 (2024): Indonesian Journal of Environment and Disasters
Publisher : Disaster Research Center, Universitas Sebelas Maret, Surakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/7wzjd153

Abstract

Indonesia needs progressive changes that are adapted to the global disaster management framework as well as a reflection of humanitarian practices to build humanitarian action that is inclusive, accountable, and people-centered. People-Centered Inclusive Humanitarian Action (PCIHA) aims to establish a disaster management model that is inclusive of persons with disabilities and follows the regional context in Indonesia. The PCIHA implementation model is adopted from the Guidelines on Inclusion of Persons with Disabilities in Humanitarian Action. It has four mandatory components used as principles in its implementation: 1) Performing data aggregation, 2) eliminating inhibiting factors, 3) promoting participation, and 4) empowering persons with disabilities. These four components are one unit that is intertwined and cannot be separated. The model implementation is carried out using a data aggregation approach as the initial entry point for implementing the other three pillars. The results obtained are differences between the data obtained and data from the Village Government. This can affect many things, especially in decision-making related to risk reduction and disaster management policies. The involvement of local organizations of persons with disabilities is needed to realize inclusiveness, which is carried out by understanding how local communities, including persons with disabilities, can be actively involved in humanitarian response when facing disasters.
BAHAYA GEMPA BUMI BERDASARKAN KONDISI GEOLOGI LOKAL DALAM UPAYA MITIGASI BENCANA DI KAPANEWON PLERET, KABUPATEN BANTUL Triyono, Agus; Paripurno, Eko Teguh; Nugroho, Arif Rianto; Koesuma, Sorja; Maharani, Yohana Noradika
JOURNAL ONLINE OF PHYSICS Vol. 10 No. 3 (2025): JOP (Journal Online of Physics) Vol 10 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v10i3.44703

Abstract

Kapanewon Pleret merupakan salah satu wilayah dengan tingkat kerusakan tertinggi saat gempa bumi Bantul 27 Mei 2006. Namun hingga saat ini, belum terdapat kajian yang secara khusus memetakan karakteristik geologi lokal dan kerentanan seismik di wilayah ini. Penelitian ini bertujuan untuk mengevaluasi potensi bahaya gempa bumi di Kapanewon Pleret, Kabupaten Bantul, berdasarkan karakteristik geologi lokal yang diperoleh melalui metode Horizontal to Vertical Spectral Ratio (HVSR). Data mikrotremor dari 70 titik diolah untuk memperoleh parameter frekuensi dominan (fₒ), faktor amplifikasi (Aₒ), indeks kerentanan seismik (Kg), percepatan tanah maksimum (PGA), dan Ground Shear Strain (GSS). Hasil penelitian menunjukkan bahwa nilai fₒ berkisar antara 0,62–12,17 Hz, Aₒ antara 0,89–6,41, dan Kg dalam rentang 0,18–26,02. Nilai PGA berada pada kisaran 0,08 hingga >0,79 g, sementara GSS tercatat antara 1,06 × 10⁻⁴ hingga 1,42 × 10⁻². Zona dengan nilai fₒ rendah, Aₒ tinggi, serta Kg dan GSS tinggi banyak ditemukan pada wilayah yang tersusun atas endapan Merapi muda, yang menunjukkan tingkat kerentanan seismik yang signifikan. Temuan ini menegaskan pentingnya karakterisasi geologi lokal sebagai dasar perencanaan mitigasi bencana gempa bumi.
Co-Authors Agus Triyono Ari Handono Ramelan Budi Legowo Darsono Darsono Doddy Sutarno Eko Teguh Paripurno Harjana Harjana Iwan Yahya Mariany, Aria Nugroho, Arif Rianto Purnama, Anton Roy Silvanto, Tri Syahrizal, Fadli Yohana Noradika Maharani