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All Journal Indonesian Journal of Geography TheJournalish: Social and Government
Listyaningrum, Noviyanti
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Humanities Earth & Planetary Sciences Law, Crime, Criminology & Criminal Justice Social Sciences

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Runoff Coefficient in the Air Bengkulu Watershed and the Evaluation of the Existing Spatial Planning Sulistyo, Bambang; Adiprasetyo, Teguh; Murcitro, Bambang Gonggo; Purwadi, Agus Joko; Listyaningrum, Noviyanti
Indonesian Journal of Geography Vol 56, No 2 (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.91397

Abstract

Runoff coefficient plays a crucial role in estimating the peak discharge of a river basin. Therefore, this research aimed to investigate runoff coefficient in the Air Bengkulu watershed based on temporal land cover data and evaluate the existing spatial planning. Land cover data from 1998, 2002, 2016, and 2023, with spatial patterns derived from current regional planning were used. The temporal and spatial pattern-based runoff coefficients were determined using land cover data and spatial pattern function, respectively. Meanwhile, descriptive and comparative methods were adopted based on time. The calculated runoff coefficient was 0.073, 0.093, 0.276, and 0.273 for 1998, 2002, 2016, and 2023, while the value obtained based on spatial patterns was 0.306. Additionally, a general trend of increasing the values over time was observed. Land cover change, particularly the decline of forest areas and the expansion of settlement and plantation, contributed to the rising runoff coefficient. The results showed that runoff coefficient (0.306) exceeded the current land cover, similar to other analyses with higher runoff in the predicted scenario. This research suggested a need for a more detailed classification system and scale to accommodate land cover types with relatively low runoff coefficient. In risk assessment, land cover-like spatial patterns with low runoff coefficient should be placed as capacity other than vulnerability components.
Optimalisasi Sumberdaya Air Untuk Pemenuhan Kebutuhan Listrik Ramah Lingkungan Menuju Ketahanan Pangan Berkelanjutan Listyaningrum, Noviyanti; Syahbudin, Atus
TheJournalish: Social and Government Vol. 4 No. 5 (2023): Special Issue
Publisher : CV The Journal Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55314/tsg.v4i5.611

Abstract

Sumberdaya air di lereng Gunung Lawu, Desa Girikerto mengalir di perkebunan teh Jamus. Air tersebut menjadi input PLTMh. Penelitian terdahulu tentang air dan energi listrik difokuskan pada lahan pertanian sawah dan ladang sehingga diperlukan penelitian yang mengkaji kaitan sumberdaya air yang mendukung ketahanan pangan berbasis energi terbarukan pada lahan perkenunan. Penelitian dilakukan secara campuran kuantitatif dan kualitatif, dengan dukungan data debit, daya, dan energi total. Analisis data dilakukan secara deskriptif. Hasil menunjukkan bahwa sumberdaya air di lokasa kajian dapat dijadikan sumber energi terbarukan. Air menjadi input pembangkit tenaga listrik PLTMh. PLTMh menjadi alternatif energi terbarukan yang berkontribusi nyata dalam aplikasi energi hijau. PLTMh pun membantu pengolahan komoditas perkebunan teh pada pabrik yang relatif ramah lingkungan karena tidak bising dan hemat enrrgi. PLTMh merupakan wujud energi terbarukan yang mendukung ketahanan pangan, khususnya komoditas perkebunan dengan memanfaatkan air lokal. Dalam jangka panjang, air, energi, dan ketahanan pangan di lokasi penelitian mendukung aksi pencegahan perubahan iklim global.
Co-Authors Atus Syahbudin Bambang Gonggo Murcitro Bambang Sulistyo Purwadi, Agus Joko Teguh Adiprasetyo