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All Journal Syntax Literate : Jurnal Ilmiah Indonesia ETNIK : Jurnal Ekonomi dan Teknik
Sentot Purboseno
Fakultas Teknologi Pertanian, Institut Pertanian STIPER Yogyakarta
Humanities Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering

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Perubahan Tata Guna Lahan di Daerah Tangkapan Air Terhadap Daya Dukung Kawasan Sentot Purboseno; Reni Astuti Widyowanti; Ary Susatyo Nugroho
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : CV. Ridwan Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.598 KB) | DOI: 10.36418/syntax-literate.v7i1.5714

Abstract

Kebutuhan air di masa Pandemi Covid-19 untuk berbagai upaya kebersihan dan kesehatan meningkat dengan signifikan. Akan tetapi peningkatan jumlah kebutuhan air tersebut tidak disertai dengan peningkatan perhatian terhadap ketersediaan air. Alih fungsi Daerah Tangkapan Air (DTA) menjadi kawasan pemukiman dan industri terus meningkat, seperti yang terjadi di DTA Danau Rawapening. Perubahan tata guna lahan DTA Danau Rawapening menyebabkan meningkatnya debit aliran permukaan pada saat musim hujan dan kekeringan di saat musim kemarau. Peningkatan debit aliran permukaan selalu diiringi dengan penurunan volume infiltrasi, sehingga pada saat musim kemarau debit aliran dasar mengecil. Menurunnya ketersediaan air tersebut menyebabkan penurunan daya dukung kawasan Danau Rawapening. Perubahan tata guna lahan di DTA Danau Rawa Pening didominasi oleh perkembangan permukiman, dari 8,48 % pada tahun 1996 menjadi 18,64 % pada tahun 2010. Kondisi tersebut menyebabkan turunnya volume air hujan yang terinfiltrasi, sehingga cadangan air tanah tidak bertambah. Hal itu akan menyebabkan turunnya debit air pada saat musim kemarau yang selanjutnya akan menurunkan daya dukung air di kawasan tersebut. Kondisi ini terus berlanjut sehingga daya dukung air pada musim kemarau semakin turun, bahkan selama tahun 2009 daya dukung air kawasan hanya sebesar 0,5 – 0,9.
Upaya Pengendalian Banjir Kawasan Sub-Das Celeng Pra Pembangunan Embung Imogiri Shofwatul Fadila; Sentot Purboseno
Jurnal Etnik: Ekonomi-Teknik Vol 1 No 10 (2022): ETNIK : Jurnal Ekonomi dan Teknik
Publisher : Rifa'Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54543/etnik.v1i10.110

Abstract

Flood on March 17 in the Celeng River, Wukirsari Village, D.I. Yogyakarta became the biggest flood that ever happened on the Bog River. Floods are caused by heavy flow of water from the hills in the Imogiri and Dlingo areas. The Celeng River overflowed and submerged four hamlets in Wukirsari Village, Imogiri District. This study aims to determine flood control efforts in the Celeng sub-watershed area. The research location is in the Kali Celeng sub-watershed, Wukirsari, Imogiri, D.I. Yogyakarta with the control point located in the lower reaches of the Celeng River right at the confluence of the Celeng River and the Oyo River. The hydrological analysis was calculated using the Gamma 1 unit hydrograph method with a return period of 10 years. The maximum flood discharges for each of the Celeng sub-watersheds are 75.73 m3/s, 38.22 m3/s, 37.20 m3/s, 18.54 m3/s, and 21.57 m3/s, and 26.29 m3/s, while the 10-year return flood discharges for the Oyo watershed is 959.60 m3/s. The hydraulic analysis was carried out by modeling the 13.35 km long Celeng River channel with HEC-RAS 4.1 software. The flow simulation is carried out steadily. The simulation results show that during the simulation of the existing state there are several points of the section of the Celeng River that overflow. The overflowing sections are then normalized with certain groove dimensions that are adjusted to the location of the flood point. The results of the flow simulation after normalization show that most of the Celeng River channel can accommodate the flood discharge that occurred. The sections that still overflow after normalization are then given embankments with an average height of 0.75 m.
Co-Authors Ary Susatyo Nugroho Reni Astuti Widyowanti Shofwatul Fadila