Dwi Maryanto, Dwi
Badan Informasi Geospasial

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PEMETAAN NERACA SUMBERDAYA AIR KABUPATEN SABU RAIJUA, NUSA TENGGARA TIMUR, INDONESIA

Geoplanning: Journal of Geomatics and Planning Vol 2, No 2 (2015): (October 2015)
Publisher : Department of Urban and Regional Planning, Diponegoro University

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Abstract

The balance of water resources reflects changing water resource potential within a certain time. Sabu Raijua Regency is a regency in East Nusa Tenggara Province that has physical problems in the water supply. This study aims to identify the potential, utilization, and the balance of water resources in Sabu Raijua Regency. The method used is quantitative and spatial analysis to calculate the potential, utilization, and balance water resources. The results showed potential and utilization of water in Sabu Raijua. The balance of water resources showed greater ‘aktiva’ than ‘pasiva’, and there is still a balance of 415,453,645.75 m3/year. This condition also shows that Sabu Raijua Regency has a surplus of water resources within a period of one year. However, in a certain period (July-September) it experiences a deficit of water resources so that it needs good water resource management to anticipate the problem. © 2015 GJGP UNDIP. All rights reserved.

Pemetaan Cepat Kawasan Terdampak Bencana Longsor dan Banjir di Kabupaten Bangli, Provinsi Bali

Majalah Geografi Indonesia Vol 31, No 2 (2017): September 2017
Publisher : Fakultas Geografi, Universitas Gadjah Mada

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Abstract

Abstrak Teknologi penginderaan jauh mengalami perkembangan yang sangat pesat. Salah satunya adalah teknologi akuisisi data dengan menggunakan UAV (Unmanned Aerial Vehicle).  Teknologi UAV dapat dipergunakan dalam berbagai bidang, salah satunya adalah bidang kebencanaan. Tujuan penelitian ini adalah untuk melakukan pemetaan secara cepat kawasan terdampak bencana banjir dan longsor di Kabupaten Bangli, Bali dengan menggunakan teknologi UAV. Metode yang digunakan adalah pemotretan udara dengan UAV, survei lapangan dan analisis laboratorium. Pemotretan udara dilakukan satu hari pasca kejadian longsor dengan ketinggian jelajah pesawat antara 100-120 meter di atas permukaan tanah. Resolusi spasial yang dihasilkan antara 4,5 - 6,5 cm. Wilayah yang berhasil dipetakan adalah wilayah yang terdampak banjir dan longsor di Desa Songan A serta Songan B, wilayah terdampak banjir bandang Yeh Mampeh di Desa Batur Selatan, serta wilayah terdampak longsor di Desa Sukawana dan Desa Awan. Berdasarkan hasil pemotretan udara, dapat diketahui luasan daerah terdampak longsor. Lebih lanjut, strategi rehabilitasi dan rekonstruksi dapat dilakukan dengan menggunakan hasil pemotretan udara.  Abstrak Remote sensing technology is experiencing rapid developments. One of which is in the field of data acquisition that has currently adopted the use of Unmanned Aerial Vehicle (UAV). UAV technology is, for instance, employed in various studies related to disasters. This research aimed to perform a rapid mapping of flood- and landslide-affected areas in Bangli Regency, Bali using UAV technology. The applied methods included UAV-assisted aerial photography, field survey, and laboratory analysis. The aerial photography was conducted one day after the landslide event and at a recording altitude of 100-120 m above the ground. The spatial resolution produced in the photography was 4.5-6.5 cm. The mapped areas were the ones affected by floods and landslides in Songa A and Songa B Villages, flash floods in Yeh Mampeh, Batur Selatan Village, and landslides in Sukawana and Awan Villages. The aerial photography also provided the extent of the landslide-affected areas. Therefore, the post-disaster rehabilitation and reconstruction strategies can be implemented using the results of the aerial photography.  

PERENCANAAN PENGGUNAAN LAHAN BERBASIS KONSERVASI SUMBER DAYA AIR DI SUB DAS CISADANE HULU

MAJALAH ILMIAH GLOBE Vol 15, No 1 (2013)
Publisher : Badan Informasi Geospasial

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Abstract

ABSTRAKPermasalahan penggunaan lahan di Sub DAS Cisadane Hulu sudah mengganggu kondisi tata airnya. Tujuan daripenelitian ini adalah untuk (1) mengidentifikasi kinerja sub-sub DAS; (2) menentukan arahan penggunaan lahan; dan(3) mengidentifikasi preferensi masyarakat tentang jenis penggunaan lahan yang optimal. Parameter penilai kinerjasub-sub DAS meliputi Indeks Penggunaan Lahan (IPL), koefisien limpasan (C), Indeks Bahaya Erosi (IBE) dan kadarsedimen (SC). Hasil analisis menunjukkan bahwa dari 44 sub-sub DAS Cisadane Hulu, 36 sub-sub DAS berkinerjaBuruk dan 8 lainnya berkinerja Sedang. Untuk meningkatkan kinerjanya digunakan skenario terbaik dalam rangkakonservasi sumberdaya air. Skenario Fungsi Kawasan menghasilkan komposisi penggunaan lahan yang terbaik,dibanding skenario Kemampuan Lahan dan RTRW. Dalam skenario terbaik, Sub DAS Cisadane Hulu terbagi atas 3kawasan dengan prioritas penggunaan lahan yang berbeda. Kawasan Lindung diarahkan untuk hutan, kawasanpenyangga diarahkan untuk hutan dan perkebunan campuran, dan kawasan budidaya diarahkan untuk sawah.Analytic Hierarchy Process (AHP) menunjukkan bahwa masyarakat memilih kawasan penyangga diarahkan untukperkebunan campuran dan kawasan budidaya diarahkan untuk sawah. Untuk melaksanakan arahan penggunaanlahan terbaik tersebut, diperlukan strategi kebijakan yaitu penetapan status kawasan, sosialisasi dan pengendalianpemanfaatan ruang yang ketat.Kata Kunci: DAS, Konservasi Sumberdaya Air, Arahan Penggunaan Lahan.ABSTRACTLand use problem in Cisadane Hulu sub watershed has led to deterioration of water resources, so that moreattention should be given to water resources conservation. The objectives of this research were: (1) to identify theperformance of sub watersheds, (2) to evaluate alternatives of land use allocation, and (3) to identify people’spreference on optimum land use. Parameters used for assessing the performance of sub watersheds include LandCover Index (IPL), coefficient of runoff (C), Erosion Hazard Index (IBE) and Suspended Sediment Concentration (Sc).Among the sub watersheds, 36 sub watersheds showed “Poor” performance, and 8 sub watersheds showed “Medium”performance. To improve the performance, 3 scenarios of land use allocation were simulated, those based onFunctional Zone, Land Capability, and Land Use Planning (RTRW). The result showed that Functional Zone scenarioproduced the best result. The best scenario directed the Cisadane Hulu sub watershed into 3 main areas with differentland use priorities. Within this scenario, protected area is directed as forest, buffer zone area as forest or mixedplantation, and cultivated area as rice field. Meanwhile, Analytic Hierarchy Process (AHP) result showed that peopleprefer to use the buffer zone area as mix plantation and the cultivation area as rice field. To implement the best landuse allocation, strategic policy is required such as defining legal status of particular area, socialization andimplementation of tight control of the land use.Keyword: Watershed, Water Resources Conservation, Land Use Allocation.