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Journal : Jurnal Geografi

Zonasi Tingkat Kerawanan Banjir Pada Ruas Bekas Sungai di Kabupaten Sukoharjo Agra Kurnia Saputra; Dian Hudawan Santoso; Andi Renata Ade Yudono
JURNAL GEOGRAFI Vol 12, No 1 (2020): JURNAL GEOGRAFI
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jg.v12i01.14390

Abstract

AbstractKecamatan Tawangsari dan Kecamatan Sukoharjo, Kabupaten Sukoharjo, Provinsi Jawa Tengah merupakan wilayah yang dilalui proyek pelurusan Sungai Bengawan Solo. Setelah dilakukan pelurusan Sungai Bengawan Solo timbul masalah baru, yaitu munculnya beberapa ruas bekas sungai. Pada awal tahun 2006 terjadi bencana banjir di sekitar ruas bekas sungai akibat masuknya aliran dari Sungai Bengawan Solo melalui ruas bekas sungai sehingga menggenangi permukiman dan lahan pertanian. Berdasarkan hal tersebut, ruas bekas sungai belum dikelola dengan baik sehingga menimbulkan masalah lingkungan. Penelitian ini bertujuan untuk mengetahui tingkat kerawanan banjir di kawasan sekitar ruas bekas sungai di lokasi penelitian. Metode yang digunakan dalam pengumpulan data adalah metode survei dan pemetaan lapangan serta metode skoring dan pembobotan. Skoring dan pembobotan dilakukan terhadap beberapa parameter, yaitu curah hujan, kemiringan lereng, jenis tanah, penggunaan lahan, elevasi, dan jarak wilayah dengan sungai (buffer). Zonasi kerawanan banjir didapatkan dengan metode skoring dan pembobotan berdasarkan parameter tersebut. Hasil penelitian menunjukkan di lokasi penelitian terdiri dari 3 zona kerawanan banjir yaitu kerawanan rendah sebesar 66,7%, kerawanan sedang sebesar 27,75%, dan kerawanan tinggi sebesar 5,55% dari total luas daerah penelitian.Kata kunci: Kerawanan Banjir, Ruas Bekas Sungai, Zonasi Tawangsari Subdistrict and Sukoharjo Subdistrict, Sukoharjo Regency, Central Java Province are the areas that have passed the Bengawan Solo River alignment project. After rectifying the Bengawan Solo River, a new problem arose, namely the emergence of several ex-river segments called billabong. In the early of 2006 there was a flood around the former river section due to the influx of flow from the Solo River along the former river section so that it inundated settlements and agricultural land. Based on this, the former river section has not been managed well, causing environmental problems. This study aims to determine the use of the former river section as a flood disaster control engineering. This study aims to determine the level of flood vulnerability in the area around the former river section of the study location. The methods used in data collection are survey and field mapping methods as well as scoring and weighting methods. Scoring and weighting are carried out on several parameters, namely rainfall, slope, soil type, land use, elevation, and distance of the area from the river (buffer). Zoning of flood hazard is obtained by scoring and weighting methods based on these parameters. The research area has three flood vulnerability zones, namely low vulnerability with 66,7%, moderate vulnerability with 27,75%, and high vulnerability level with 5,55% of the total area of the study area.Key words: Flood Hazard, Billabong, Zoning
Environmental Carrying Capacity Based on Ecosystem Services for Settlement Development Plans in The Sota State Border Area, Merauke Santoso, Dian Hudawan; Astanti, Yuli Dwi; Adventri Wibowo, Astrid Wahyu
JURNAL GEOGRAFI Vol. 17 No. 2 (2025): JURNAL GEOGRAFI
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jg.v17i2.64937

Abstract

Sustainable settlement design necessitates the incorporation of environmental carrying capacity determined by ecosystem services. In border areas like the Sota Border Area (KPN) in Papua, ecological pressures intensify as a result of population expansion and economic endeavours. This study assesses the environmental carrying capacity and resilience of settlements through an ecosystem services framework, comparing conditions in 2019 and 2024 to evaluate the impact of development plans. The analysis focuses on five key ecosystem services: food provision, clean water supply, water flow regulation and flood control, disaster protection, and air quality maintenance. Data collection involved field surveys, remote sensing, and GIS-based spatial overlay analysis to map land use changes and ecosystem service values. Results in 2019 showed residential development concentrated in zones with high ecosystem service values, such as food provision (771.7 ha in SUB BWP 2) and clean water supply (742.98 ha in SUB BWP 3). Development in low-lying areas prioritized flood regulation (460.1 ha in SUB BWP 1) and disaster protection (560.7 ha in SUB BWP 1). By 2024, developed land in the very high clean water supply zone of SUB BWP 1 increased sharply from 0.10 ha to 28.86 ha. This research highlights the critical need to incorporate ecosystem service data into settlement planning to sustain environmental capacity and enhance border region sustainability