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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Indonesian Journal of Geography Geo Media: Majalah Ilmiah dan Informasi Kegeografian JEJAK Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Forum Geografi Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Biosaintifika: Journal of Biology & Biology Education Jurnal Penelitian Kehutanan FALOAK Jurnal Hutan Pulau-Pulau Kecil : Jurnal Ilmu-Ilmu Kehutanan dan Pertanian Jurnal Wana Tropika Jurnal Ilmu Kehutanan Jurnal Ilmu Kehutanan Jurnal Wana Tropika
Ambar Kusumandari
Fakultas Kehutanan, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Environmental Science Immunology & microbiology

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PENDEKATAN SPASIAL EKOLOGIS UNTUK PENGELOLAAN DAERAH ALIRAN SUNGAI (DAS) BERKELANJUTAN BERBASIS PENGENDALIAN EROSI (STUDI KASUS DI SUB DAS NGRANCAH, KABUPATEN KULON PROGO) Susatyo, Marcus Octavianus; Marsono, Djoko; Kusumandari, Ambar; Supriyanto, Nunuk
Jurnal Wana Tropika Vol 6 No 1 (2016)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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Abstract

Sustainable development basically lies in the achievement of harmonisation between economic, ecological and social purposes. One form of sustainable development fromthe perspective of ecological dimension is the existence of spatial harmonism. Spatial harmonism means that in every development area have to allocate conservation area that has been identified in the form of forest area or area which serves as a forest (rural forest). Both in forest law and spatial law consider the existence of forets area at least 30 % of the watershed area.The research was conducted at Ngrancah Sub Watershed. Ngrancah Sub watershed is one part of Serang Watershed. According to Forestry minister decree Nr. 328 year 2009, Serang watershed is one of 108 critical watersheds and need to be given priority handling. The aims of this research are : (1) to investigate soil erosion, soil erosion rates, and soil erosion index ;(2) to analyze spatial ecology harmonism based on erosion control to optimize conservation area. Ngrancah Sub Watershed is the catcment area of Sermo Dam. The area of Ngrancah Sub Watershed is almost 2150 hectares. The area is mostly critical showed by the high rate of erosion. The high rate of erosion indicates that Ngrancah Sub Watershed needs to be manage and handled properly to reduce land degradation. Erosion is predicted using RUSLE Method (RUSLE Equation EA = Ri .K.L.S.C.P) and water balance (aridity index) based on its meteorogical function is calculated using Tornthwaite-Mather method. Isohyet methode is used to calculated rainfall while erodibility factor is calculated using Willem Formula (1995). According to Minimum Legible Area (Vink, 1975), research area could be classified into 80 spatial/ecological units. Slope observation and soil conservation practices is done in each spatial/ecological unit as well as soil samples also taken in each spayial/ecological unit. Linear program with QSB+ Software is conducted to analyse the data.The result of the research showed that the erosion rates varies from the lowest rate of 3,83 ton/ha/year to the highest rate of 494,91 ton/ha/year. About 39,98 % of research area is classified as moderate erosion rate area and about 38,39% of the area as high into very high erosion rate area. Based on Erosion Indeks, about 16,22% of the area is classified as the moderate Erosion Indeks and 73,30% of the area as high into very high Erosion Indeks. Spatial Ecology approach for sustainable watershed management by QSB+ program on the effort of erosion controll showed that to achieve spatial ecology harmonism is needed 87,48 % conservation area (area that identified as forest function) from the total area of Ngrancah Sub Watershed. Rural forest development (or agroforestry) involving local community is recommended to meet spatial ecology harmonism considering existing condition of Ngrancah Sub Watershed that only 2 % of forest area in Ngrancah Sub Watershed. Key Words : Spatial Ecology, Spatial Harmonism, erosion, RUSLE , QSB+
Karakteristik Biofisik Ruang Terbuka Hijau Pada Hutan Kota Samarinda, Provinsi Kalimantan Timur Endayani, Sri; Sadono, Ronggo; Kusumandari, Ambar; Hartono, Hartono
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 9 No 4 (2019): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.9.4.977-985

Abstract

Population growth and economic activity always require space. Physical, social and economic composition always changes due to spatial land use. Changes in spatial land use that do not take into account the biophysical balance will result in natural disasters. Urban problems in the use of space result in the disturbance of the harmony between human and the nature. The economy is improving, but the nature is suffering from damages. Green open space is the right solution. This research’s objective is to determine the biophysical characteristics (soil characteristics, stand potential, slope and rainfall) of the urban forests in Samarinda. The results show the class of clay texture, acid soil pH, low organic matter and gray brown color. The urban forests in Samarinda are dominated by species of Jati (Tectona grandis), Jati Putih (Mangifera indica), Mahoni (Swietenia macrophylla), Jambu (Anacardium occidentale), Jambu Batu (Psidium guajava), Kayu Jawa (Lannea grandis), Gmelina arborea, Angsana (Pittocarpus indicus), Bitti (Vitex cofassus), Trembesi (Samania samania), Morinda citrifolia and Kapuk (Ceiba Pentandra), hilly slopes, rather steep altitude range of 16-65 mdpl and an average rainfall of 1 095.9 mm/year.
Co-Authors - Mahmud Abd. Rasyid Syamsuri Chafid Fandeli Danang Wijaya Denny Irawati Dian Iswandaru Djoko Marsono Hartono Hartono Hartono Hartono Hatma Suryatmojo Irfansyah Diangga Yusuf Nugraha Kaharuddin Kaharuddin M Chrisna Satriagasa Mahmud Mahmud Mahmud Mahmud Nunuk Supriyanto, Nunuk Nunuk Supriyatno Nunuk Supriyatno Ronggo Sadono Ryke Nandini Ryke Nandini Ryke Nandini Sambas Sabarnurdin Sofiudin Nurmansyah Sri Astuti Soedjoko Sri Endayani Sri Endayani, Sri Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sudarmadji Supriyandono Supriyandono Susatyo, Marcus Octavianus Totok Gunawan Totok Gunawan Totok Gunawan Wahyudi Wahyudi Yundari, Yundari