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All Journal Geosfera: Jurnal Penelitian Geografi Jurnal Riptek LIMNOTEK
Priakusuma, Dwi
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Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Social Sciences Transportation

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PENGARUH BUDAYA DAN KOMPLEK REGIONAL DALAM ETIMOLOGI TOPONIMI DI WILAYAH SEKITAR UNNES Hanafi, Fahrudin; Priakusuma, Dwi
Geosfera: Jurnal Penelitian Geografi Vol 2, No 2 (2023): Geosfera: Jurnal Penelitian Geografi
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/geojpg.v2i2.23055

Abstract

Toponimi merupakan bagian dari data geospasial yang karakter unik sebuah obyek spasial. Objek toponimi mencakup asal kata, asal bahasa, makna, cerita dan sejarah yang terkandung dari nama suatu daerah. Toponimi dapat menjadi identitas dari sebuah entitas yang mengikuti kecenderungan wilayah atau trend disuatu waktu. Penelitian ini bertujuan untuk menganalisis pengaruh budaya dan komplek regional dalam asal kata (etimologi) toponimi di wilayah sekitar UNNES. Metode pengumpulan data menggunakan metode purposive sampling, kemudian data geospasial tersebut diolah dan dikategorikan berdasarkan unsur yang mempengaruhi penamaan rupa bumi yang ditemui di sekitar Unnes yakni biotik, abiotik dan budaya untuk kemudian disajikan dalam bentuk analisis kuantitatif. Hasil menunjukkan bahwa di wilayah sekitar Unnes, budaya merupakan satu unsur dominan yang mempengaruhi penamaan rupa bumi. Dari total 55 data, terdapat 30 data (54,55%) yang dipengaruhi oleh unsur budaya didalam penamaannya. Pengaruh komplek regional diklasifikasikan dalam 2 unsur yakni biotik dan abiotik, biotik mempengaruhi 9 dari 55 data (16,36%) dan unsur abiotik dengan 7 dari 55 data (12,73%). Unsur budaya juga memiliki sub unsur terbanyak sejumlah 7 sub unsur, nama tokoh merupakan paling dominan dengan jumlah 14 data. Selain nama tokoh, bentang alam merupakan subunsur dari unsur abiotik yang cukup dominan dengan jumlah 10 data.
UAV Mapping for Flood Routing in Steep and Densely Vegetated Areas: Insights from the Contok River Basin, Garang Watershed, Indonesia Hanafi, Fahrudin; Kurniawan, Edi; Priakusuma, Dwi; Kubiak-Wojcicka, Katarzyna
LIMNOTEK Perairan Darat Tropis di Indonesia Vol. 30 No. 1 (2024)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/limnotek.2024.5028

Abstract

This research utilizes photogrammetry to assess flood routing dynamics in the Contok river basin, a sub-watershed with a challenging landscape characterized by steep slopes, dense vegetation, and meandering patterns. The objectives are to assess Unmanned Aerial Vehicle (UAV) mapping accuracy, evaluate the river's capacity for design flood volumes, quantify the impact of land cover changes on surface runoff, and provide insights for early warning systems and watershed conservation strategies. The study area, encompassing the Contok River Basin, a sub-watershed of the Garang Watershed, covers 7,413 km² and includes a stream length of 5,274 meters in Semarang City, Central Java, Indonesia. This research employed image processing of aerial photographs and satellite imagery. Aerial photos captured using UAV data were utilized to derive elevation data and cross-sectional profiles of the Contok River, essential for understanding channel morphology and hydraulic characteristics. Concurrently, satellite imagery was used for land cover analysis, identifying vegetation and built-up areas that influence surface runoff dynamics. Hydrological analysis was performed to quantify discharge magnitudes, simulated against river cross-sections to evaluate flood behavior under varying scenarios. Our proposed UAV mapping provides adequate accuracy for small and local areas. Furthermore, it remains reliable for flood routing analysis. We discovered that the capacity of the Contok River channel in the downstream area allows it to convey design flood discharges up to a 50-year return period, contrary to the upstream area, it overflows. Notably, the shift from vegetated to built-up and agricultural areas significantly contributes to the 10.6% increase in surface runoff. This research highlights the role of UAV-based photogrammetry in assessing and mitigating flood hazards amidst evolving land cover patterns. It also enhances the understanding of flood dynamics and thus provides insights that will serve as a reference for flood early warning systems, flood management practices, and watershed conservation.
Analisis Banjir Genangan di Kawasan Tembalang dan Sekitarnya Sidiq, Wahid Akhsin Budi Nur; Hanafi, Fahrudin; Priakusuma, Dwi; Haruman, Willar; Sumarso, Muhammad Yunan; Setyowati, Nanik
Jurnal Riptek Vol 16, No 2 (2022)
Publisher : Badan Riset dan Inovasi Daerah Kota Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (766.444 KB) | DOI: 10.35475/riptek.v16i2.159

Abstract

Semarang City has a low and flat topography in several areas so that it has a high risk of inundation during the rainy season with a spatial distribution in the city center area. In 2022 inundation floods have inundated 877.66 hectares, one of which is in the Tembalang area and its surroundings with a height of around 275 MDPL which occurred in 20 locations with an area of around 33.62 hectares, where the area is the downstream part of the Babon Watershed. The results of the analysis of rain in the Babon watershed area for 20 years show that it is relatively stable, not too much variation, where the results of calculating the rational flood discharge for 2022 with a return period of 2 years are around 25.80 m³/s. Furthermore, the morphometric analysis of the watershed shows that the shape of the Babon watershed is relatively elongated with a circularity ratio <0.50, the density index of the river is 0.25 – 10 km/km² which is in the medium density category with a relatively long Time Concentration (TC) of around 3.2 hours so that it is less thus impacting flooding downstream. The Babon watershed runoff coefficient is affected by land cover conditions, where the interpretation results show that there was a change in land cover from 2002 – 2022 for the area of built-up land which increased by 708.44 hectares and the vegetation area decreased by 486.77 hectares. Analysis of channel capacity shows that there is potential for overflow from existing channels in 7 sub-watersheds which will result in inundation. The conclusion of this study shows that rainfall over the past 20 years has been relatively stable and the morphometry of the watershed has not had much impact on downstream flooding, the main river capacity of the Babon DAS is still sufficient to accommodate the planned flood discharge with a return period of 25 years. So that inundation that occurs is more caused by changes in land cover and drainage capacity in the downstream. 
Co-Authors Edi Kurniawan Fahrudin Hanafi, Fahrudin Haruman, Willar Kubiak-Wojcicka, Katarzyna Nanik Setyowati Sumarso, Muhammad Yunan Wahid Akhsin Budi Nur Sidiq, Wahid Akhsin Budi Nur