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MAJALAH ILMIAH GLOBE
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Articles 347 Documents
KERENTANAN PESISIR TERHADAP PERUBAHAN IKLIM DI TIMUR LAUT PROVINSI BALI Putra, Aprizon; Husrin, Semeidi; Tanto, Try Al; Pratama, Roka
MAJALAH ILMIAH GLOBE Vol 17, No 1 (2015)
Publisher : Badan Informasi Geospasial

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1000.26 KB) | DOI: 10.24895/MIG.2015.17-1.217

Abstract

Secara garis besar, morfologi pesisir timur laut Bali dikategorikan sebagai “Mountainous Coast" yaitu pesisir yang terbentuk dari aktivitas gunung api Tersier-Resen dari gunung Agung (3.142 mdpl). Sungai-sungai yang bermuara umumnya bersifat sub radial karena pengaruh gelombang dan arus laut lebih dominan dari arus sungai, maka beberapa sungai mengalir sejajar dengan garis pantai (spit) sebelum bermuara ke laut. Pengaruh endapan sungai dan gunung api menyebabkan pesisir timur laut Bali memiliki sedimen pasir hitam, kerakal dan bongkah yang terbentuk oleh proses-proses vulkanik. Adapun tujuan penelitian ini adalah untuk mengetahui zona wilayah pesisir yang rentan terhadap perubahan iklim di timur laut Bali. Metode penelitian yang digunakan yaitu dengan Indeks Kerentanan Pesisir (IKP) dimana data-data yang digunakan terdiri dari data geospasial dan data oseanografi yang diolah menjadi angka-angka secara kuantitatif. Hasil analisa data penelitian menunjukkan, pesisir timur laut Bali dikategorikan sebagai wilayah dengan kerentanan pesisir sedang – sangat tinggi, dimana dari 20 titik pengamatan dengan panjang garis pantai ± 60 km memperlihatkan hasil IKP untuk Profil 3 dan 9 memiliki kerentanan sangat tinggi ( > 4), sedangkan untuk Profil 1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14, 16, 17, 18, 19, dan 20 memiliki kerentanan tinggi (3 – 4), dan Profil 10, 15 memiliki kerentanan sedang (2 – 3).Kata kunci: kerentanan pesisir, perubahan iklim, timur laut BaliABSTRACTIn general, morphology of the northeastern coast of Bali is categorized as "Mountainous Coast" which is a coastal that was formed by volcanic activity Tersier-Resen from Mount Agung (3.142 mdpl).The rivers that empties to the sea generally in a sub radial form due to the influence of waves and ocean currents are more dominant than the rivers, hence several rivers flowi parallelly toward the coastline (spit) before emptying into the sea. Effect of stream sediment and volcanic cause the northeastern coastal Bali contains black sand sediment, gravel and boulders were formed by volcanic processes. The purpose of this study was to determine the coastal zone areas in the Northeastern Bali that are vulnerable to climate change. The method used was a Coastal Vulnerability Index (CVI) where the data used consisted of geospatial and oceanographic data that were processed into quantitative figures. Results of analyses shows that the northeastern coastal Bali categorized as coastal regions with moderate to very high vulnerability. Among the 20 observation points along ± 60 kms coastline,the CVI in Profile 3 and 9 show a very high vulnerability (> 4), while CVI at Profile 1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14, 16, 17, 18, 19 and 20 show high vulnerability (3 – 4), and CVI at Profile 10, 15 show moderate vulnerabilities (2 – 3).Keywords: Coastal Vulnerability, Climate Change, Northeastern Bal
URBAN GROWTH PREDICTION USING LOGISTIC REGRESSION MODEL Karsidi, Asep; Wijanarto, Antonius B
MAJALAH ILMIAH GLOBE Vol 13, No 2 (2011)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (535.103 KB) | DOI: 10.24895/MIG.2011.13-2.97

Abstract

Urbanization has been one of major issues in Indonesia, especially in big cities likeJakarta. Bogor as the supporting area of Jakarta has been affected by this urbanization. It did not only impact in increasing population, but it did also affect the carrying capacity of the environment. This research studied urban growth of Bogor, using logistic regression model. The model involve several driving factors that can be used to predict future impact of urbanization. The results indicate that the logistic regression model for urban growth in Bogor shows that R2 = 0.18, which means that the model is relatively good. In this research ROC has been produced is 0.8429, which means the logistic regression model of urban growth of Bogor can be estimated well.Keywords: Urban Growth, Logistic Model, Spatial AnalysisABSTRAKUrbanisasi merupakan salah satu isu besar di Indonesia, khususnya di kota-kota besar seperti Jakarta. Bogor sebagai daerah pendukung Jakarta juga menjadi daerah yang mendapat dampak dari urbanisasi tersebut. Bukan hanya jumlah populasi yang makin bertambah, tetapi juga daya dukung lingkungan yang juga dipengaruhi. Penelitian ini mengkaji pertumbuhan urbanisasi di Bogor, dengan menggunakan model logistik. Model ini mengidentifikasi beberapa faktor pendorong yang digunakan untuk memprediksi pertumbuhan urbanisasi ke depan. Hasil dari model regresi logistik menunjukkan bahwa pertumbuhan urbanisasi di Bogor dapat diprediksi dengan R2 = 0,18, yang dapat dikategorikan agak bagus. Dalam penelitian ini ROC = 0,8429, yang berarti urbanisasi di Bogor dapat diprediksi dengan baik menggunakan model regresi logistik.Kata Kunci: Pertumbuhan Urbanisasi, Model Logistik, Analisis Spasial
APLIKASI SISTEM INFORMASI GEOGRAFIS DALAM Pemetaan KERENTANAN KAWASAN TAMAN NASIONAL BUKIT BAKA BUKIT RAYA, PROPINSI KALIMANTAN BARAT auliyani, diah
MAJALAH ILMIAH GLOBE Vol 19, No 1 (2017)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (674.206 KB) | DOI: 10.24895/MIG.2017.19-1.565

Abstract

ABSTRAKTaman Nasional Bukit Baka Bukit Raya (TNBBBR) merupakan perwakilan tipe ekosistem hutan hujan tropis pegunungan dan habitat satwa liar baik yang dilindungi maupun yang belum dilindungi. Fisiografi kawasan ini berupa pegunungan patahan yang di dalamnya terdapat salah satu dari The Seven Summits of Indonesia yaitu Bukit Raya. Kondisi tersebut menyebabkan kawasan ini berpotensi mengalami degradasi karena erosi maupun aktivitas wisata. Penelitian ini bertujuan untuk memetakan kerentanan kawasan TNBBBR menggunakan Indeks Sensitivitas Lingkungan. Penelitian dilaksanakan di dalam kawasan TNBBBR wilayah Kabupaten Sintang Propinsi Kalimantan Barat. Analisis data dilakukan secara spasial menggunakan metode tumpang susun (overlay) dengan pemberian peringkat yang terdiri atas sangat rendah, rendah, sedang, tinggi, dan sangat tinggi. Kerentanan kawasan ditentukan berdasarkan analisis daerah bahaya erosi, daerah tangkapan air dan daerah perlindungan satwa. Hasil penelitian menunjukkan bahwa tingkat kerentanan kawasan TNBBBR wilayah administrasi Kabupaten Sintang bervariasi dari tingkat yang sangat rendah (22,01%), rendah (67,67%), sedang (10,28%), dan tinggi (0,05%). Meskipun hanya sebagian kecil dari lokasi penelitian yang memiliki tingkat kerentanan tinggi, namun semuanya berada di Resort Rantau Malam yang merupakan pintu masuk untuk pendakian ke puncak Bukit Raya dari Propinsi Kalimantan Barat. Sebagian besar daerah dengan tingkat kerentanan tinggi (81,17 %) telah berada di zona rimba. Peruntukan zonasi tersebut bertujuan untuk membatasi aktivitas yang bisa dilakukan sehingga degradasi lingkungan terutama akibat aktivitas antropogenik dapat dicegah.Kata Kunci: biofisik, kerentanan, Sintang, taman nasional, zonasi  ABSTRACTBukit Baka Bukit Raya National Park (BBBRNP) is a representative of tropical rainforest ecosystem and wildlife habitat either the protected wildlife or those that has not been protected yet. It’s physiographic consists of block mountain in which there is Bukit Raya, one of the Seven Summits of Indonesia. These conditions cause this area has potentially degraded due to erosion and tourism activities. This study aimed to map out the vulnerability of BBBRNP area using Environmental Sensitivity Index. Research conducted in the BBBRNP area located in Sintang District, West Kalimantan Province. The data were analyzed using spatial analysis by overlaying with a ranking that divided into very low, low, medium, high, and very high. Regional vulnerability is determined based on an analysis of erosion-prone areas, catchment areas, and wildlife protection areas. The results of this research show that the vulnerability level of the BBBRNP area located in Sintang Districtvary from very low (22,01 %), low (67,67 %), medium (10,28 %), and high (0,05 %). Although only several research areas that have high level of vulnerability, but all of them are located in Rantau Malam Resort which is the entrance for climbing Bukit Raya summit from West Kalimantan Province. Most of those areas located in Wilderness Zone (81,17%). The zoning allocation aimed to limit the anthropogenic activities so that the environmental degradation can be prevented. Keywords: biophysical, vulnerability, Sintang, national park, zoning
CHANGE OF SEA SURFACE HEIGHT IN THE SOUTHERN WATERS OF JAWA-SUMBAWA DURING INDIAN OCEAN DIPOLE 2016 Martono, Martono
MAJALAH ILMIAH GLOBE Vol 19, No 1 (2017)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24895/MIG.2017.19-1.615

Abstract

Indian Ocean Dipole is a weather deviation that occurs in the tropical Indian Ocean due to air-sea interactions. This study was conducted to understand sea surface height change in the southern waters of Java, Bali and Lombok-Sumbawa during Indian Ocean Dipole 2016 events. Data used consists of dipole mode index, daily sea surface height, monthly chlorophyll-a concentration and pentad geostropic current. Anomaly analysis was used to assess sea surface height change. The result showed that during Indian Ocean Dipole 2016 events occured the increase of sea surface height in these waters. The average increase of sea surface height from June-Novemver 2016 in the southern waters of Java, Bali and Lombok-Sumbawa approximately 25 cm, 23 cm and 17 cm, respectively. Impact of the increase of sea surface height affects chlorophyll-a concentration to drop that was marked by negative anomaly. The highest decrease of chlorophyll-a concentration occured in the southern waters of Java. The decrease of chlorophyll-a concentration in in the southern waters of Java reached -1.02 mg/m3, in the southern waters of Bali reached -0.74 mg/m3 and in the southern waters of Lombok-Sumbawa reached -0.35 mg/m3. Keywords: change, sea surface height, Indian Ocean Dipole, chlorophyll-a
STUDI KONSTANTA TM (MEAN WEIGHT TEMPERATURE) UNTUK PENENTUAN KANDUNGAN UAP AIR DARI DATA GPS DI INDONESIA Susilo, Susilo; Koentjoro, Wedyanto; Efendi, Joni
MAJALAH ILMIAH GLOBE Vol 14, No 2 (2012)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (174.928 KB) | DOI: 10.24895/MIG.2012.14-2.142

Abstract

Uap air adalah elemen utama proses termodinamika atmosfer dan mempunyai peranan yang penting dalam proses kondensasi dan pembentukkan awan, yang akhirnya dapat mempengaruhi keseimbangan energi radiasi. Pengamatan uap air sangat penting untuk memantau cuaca dan perubahan iklim dalam skala global/regional. Namun, variasi konsentrasi uap air cukup tinggi sehingga sulit untuk diamati secara akurat dengan menggunakan teknik pengamatan meteorologi konvensional (radiosonde), yang terbatas dalam ruang dan waktu. Saat ini, Global Positioning System (GPS) dapat digunakan untuk pengamatan uap air secara akurat. Penelitian ini, menggunakan data 14 stasiun kontinu GPS Bakosurtanal untuk mengamati karakteristik temporal uap air di atas wilayah Jawa Barat. Delay pengamatan GPS dari setiap stasiun diestimasi dengan interval 1 (satu) jam dalam periode 2008 - 2010. Dengan menggunakan data pengamatan meteorologi di permukaan, delay GPS dikonversi menjadi parameter kandungan uap air (Precipitable Water Vapor/PWV). Konversi dari delay GPS menjadi PWV sangat bergantung dari nilai yang merupakan fungsi dari Tm. Hasil penelitian menunjukkan perbedaan nilai Tm dari radiosonde dan NCEP tidak berpengaruh terhadap nilai , hal ini ditunjukkan dengan nilai rerata bias dari PWV radiosonde dan NCEP terhadap PWV GPS < 1 mm dengan koefisien korelasi > 95%.Kata Kunci: GPS, Kandungan Uap Air, Konstanta Tm ABSTRACTWater vapour is a principal element in thermodynamics of atmosphere and plays an important role in clouds condensation, which eventually can affect the radiation energy balance. Water vapor observation is essential for monitoring global/regional scale of weather and climate changes. However, high variation of water vapor concentrations make it difficult to observe accurately using the conventional meteorological observation technique (radiosonde), which is limited in both space and time. Nowadays, accurate observation of water vapor can be accomplished by using Global Positioning System (GPS). This research, used 14 continuous GPS stations from Bakosurtanal to observe temporal characteristic of water vapor concentrations over West Java region. In this research, site-specific zenith tropospheric delays were hourly estimated during three years of GPS measurement period (2008-2010). By using the surface meteorological measurements, those delays were then converted into Precipitable Water Vapour (PWV) parameters. The results show that the value of P did not affected by the variation of Tmas indicated by the mean of the bias of the PWV radiosonde and NCEP to PWV GPS which was less than 1 mm with coefficient of correlation greater than 95%.Keywords: GPS, Precipitable Water Vapor, Tm constant
LANDSLIDE VULNERABILITY MAPPING OF BUNGUS BAY COASTAL TOURISM, WEST SUMATERA, INDONESIA USING STORIE METHOD Gemilang, Wisnu Arya; Wisha, Ulung Jantama; Dhiauddin, Ruzana
MAJALAH ILMIAH GLOBE Vol 20, No 1 (2018)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1222.076 KB) | DOI: 10.24895/MIG.2018.20-1.732

Abstract

Bungus Bay and its surrounding are one of the coastal tourist areas that are frequently visited by domestic as well as international tourists. Morphology around the bay is a mountainous landscape that has a steep slope. Materials forming the hillside around the coast are volcanic rocks, which through. Weathering process resulted in rocky area with thin layer of soil. These conditions are the main factor triggering landslide events. Information regarding vulnerable zone of the landslide is essential to reduce the impact of the landslide phenomena in Bungus Bay. The vulnerability classification was done by applying the Storie method to analyze four main parameters which are, slope, land-use, soil type and rainfall intensity. The landslide vulnerability level in Bungus Bay was divided into five levels, namely very low, low, moderate, high, and very high. High vulnerability covers 39.33 % of the study area. Meanwhile, moderate vulnerability covered 39.20 %. Both levels of vulnerability ware located in the lithosol area which is very sensitive to the soil erosion. Land-use change in protected forest area and the lithosol soil type become the main factors triggering the landslide events. Mitigation efforts in the form of physical development and socialization are to reduce the impacts of the landslide in this area.Keywords: Landslide, vulnerability, storie method, Bungus Bay, coastal
IDENTIFIKASI LAHAN TAMBANG TIMAH MENGGUNAKAN METODE KLASIFIKASI TERBIMBING MAXIMUM LIKELIHOOD PADA CITRA LANDSAT 8 Catur, Udhi; Susanto, Susanto; Yudhatama, Dipo; Mukhoriyah, Mukhoriyah
MAJALAH ILMIAH GLOBE Vol 17, No 1 (2015)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (777.147 KB) | DOI: 10.24895/MIG.2015.17-1.213

Abstract

Timah merupakan salah satu jenis bahan tambang dimana aktivitas tambang timah di Indonesia telah berlangsung lebih dari 200 tahun dengan jumlah cadangan yang cukup besar. Cadangan timah ini tersebar dalam bentangan wilayah sejauh lebih dari 800 kilometer yang disebut The Indonesian Tin Belt. Pulau Bangka dan Belitung dikenal sebagai daerah penghasil timah (Sn) terbesar di Indonesia dan merupakan bagian dari Jalur Mineralisasi Logam di Indonesia bagian barat. Penelitian ini bertujuan untuk untuk mengetahui akurasi hasil identifikasi lahan tambang timah secara digital menggunakan metode klasifikasi terbimbing maximum likelihood dibandingkan identifikasi lahan tambang secara visual. Ciri-ciri lahan tambang timah pada citra Landsat 8 dengan kombinasi RGB 753 yaitu mempunyai warna coklat terang sampai dengan putih cerah, tekstur kasar, memiliki pola teratur, mengelompok, dan mengikuti pola sungai, memiliki ukuran lahan yang sangat luas, bentuknya memanjang yang berupa poligon-poligon, dan terdapat kubangan air/kolong yang berwarna biru muda sampai tua. Total akurasi pada confussion matrix antara klasifikasi terbimbing maximum likelihood dengan klasifikasi visual adalah 90,5%, nilai akurasi Kappa 0,51, dan user‟s accuracy lahan tambang timah sebesar 50,02%. Total akurasi lebih dari 85% menunjukkan metode maximum likelihood sudah mampu membedakan antara lahan tambang dengan non tambang. Data kuantitatif yang dihasilkan belum bisa dijadikan acuan karena masih ada kesalahan hasil klasifikasi, tetapi sudah cukup menggambarkan secara spasial. Untuk meningkatkan akurasi hasil klasifikasi perlu dipilih komposisi band yang tepat dan training sampel yang baik.Kata kunci: timah, lahan tambang, Landsat 8, klasifikasi terbimbing, maximum likelihoodABSTRACTTin is one type of economic mineral, tin mining activity in Indonesia has lasted more than 200 years with a fairly large number of reserves. Tin reserve spread over an area more than 800 kilometers, called “the Indonesian Tin Belt”. Bangka and Belitung islands known as the producer of tin (Sn), the largest in Indonesia and part of the Mineralization Zone in western Indonesia. This study aimed to determine the accuracy of the results digitally identification of tin mining area using maximum likelihood supervised classification method compared to visual identification of tin mining area. Characteristics of tin mining area on Landsat 8 imagery in combination of RGB 753 which has a light brown color to bright white, coarse texture, has a regular pattern and follows the pattern of the river, has a large size with elongated shape, and there were puddles of water with bright until dark blue color. Total accuracy in the confusion matrix between the maximum likelihood supervised classification with visual classification is 90.5%, the Kappa value is 0.51, and user‟s accuracy of tin mining area is 50,02%. The total accuracy is more than 85%, indicates the maximum likelihood method has been able to distinguish between the non-mining with tin mining area. Quantitative data generated can not be used as a reference because there are some errors in the classification results, but already quite describe spatially. To improve the accuracy of the classification need to be selected right band composition and good training samples.Keywords: tin, mining, Landsat 8, supervised classification, maximum likelihood
KARAKTERISTIK PANTAI DAN PROSES ABRASI DI PESISIR PADANG PARIAMAN, SUMATERA BARAT Solihuddin, Tb.
MAJALAH ILMIAH GLOBE Vol 13, No 2 (2011)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.682 KB) | DOI: 10.24895/MIG.2011.13-2.93

Abstract

Penelitian lingkungan pantai di Padang Pariaman, Sumatera Barat dilakukan untuk mengetahui karakteristik pantai dan proses dominan yang terjadi di pesisir Padang Pariaman. Informasi tersebut dapat dimanfaatkan pemerintah setempat dalam pengelolaan dan perencanaan wilayah pesisir. Berdasarkan data BMG stasiun Padang Tabing tahun 1995 – 2005, arah angin dominan berasal dari arah barat dengan persentase 8,.49%. Gelombang paling sering terjadi dari arah barat dengan persentase 8,.47% dan ketinggian antara 0,.1 – 1 m. Berdasarkan prediksi pasang surut menggunakan program tide model driver, tipe pasang surut daerah penelitian campuran condong ke harian ganda dengan tunggang pasut sekitar 109,.57 cm ≈ 10,.9 dm. Berdasarkan hasil pengamatan lapangan, karakteristik pantai daerah penelitian termasuk jenis pantai berpasir. Endapan penyusun pantainya adalah endapan aluvial dengan kemiringan lereng pantai antara 4 – 15°, dan proses pantai dominan adalah abrasi. Proses abrasi secara intensif terjadi di pesisir Kota Pariaman, terutama di Pantai Apar ditandai dengan terbentuknya gawir abrasi setinggi ± 1,5m. Upaya penanggulangan abrasi yang telah dilakukan pemerintah adalah dengan membuat groin sepanjang 30 m dan jarak antar groin sekitar 50 m.Kata Kunci: Karakteristik Pantai, Abrasi, Pengelolaan dan Perencanaan PesisirABSTRACTResearch on coastal environment in Padang Pariaman, West Sumatera was carried out to investigate coastal characteristics and dominant physical process in Padang Pariaman coast. The information can be used by local government as input for coastal zone management and planning. Based on data collected at Padang Tabing Meteorology, Climatology and Geophysics Agency (BMKG) station, during 1995 – 2005, the westerly wind was dominated with percentage of 8.49% and the waves resulted from westerly wind occured with the highest percentage of about 8.47% with 0.1 – 1 m wave height. Condition of the tide as estimated by using ‘tide model driver’ software showed that the tidal type of the research area was mixed, dominated by semidiurnal, with the tidal range of 109.57 cm ≈ 10.9 dm. Based on field observation, the coastal type of the research area is sandy beach. The research area is formed by alluvial deposits, with beach slope is between 4 - 15°, and coastal erosion dominated the physical processes on the coastal area. Intensively coast erosion occurred in Pariaman coast, particularly at Apar coast as marked by the present of ±1,5 m of beach escarpment. The local government has placed groins with 30 m length and 50 m groins spacing to protect the beach erosion.Keywords: Coastal Characteristics, Coast Erosion, Coastal Management and Planning
PEMETAAN LOKASI PENGEMBANGAN BUDIDAYA PERIKANAN DI KABUPATEN LAMPUNG UTARA Sudarmadji, Bambang Wahyu; Munaiati, Sri Lestari
MAJALAH ILMIAH GLOBE Vol 1, No 2 (1999)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2072.99 KB)

Abstract

Sistem lnformasi Geografis merupakan suatu perangkat yang sampai saat ini banyak dimanfaatkan oleh institusi-institusi untuk berbagai kepentingan, terutama di bidang pemetaan. Kabupaten Lampung Utara merupakan salah satu dari pemerintah daerah yang menggunakan perangkat tersebut untuk kepentingan pemetaan pengembangan budidaya perikanan darat. Dengan diketahuinya lokasi-lokasi untuk pengembangan budidaya perikanan, diharapkan pemerintah Daerah Kabupaten Lampung Utara dapat mengambil kebijakan yang tepat untuk perencanaan yang akan diambil.ABSTRACTGeographic Information System is a tool that is commonly utilized by institutions for various usages especially in the field of mapping. North Lampung Regency is one of local governments that use GIS for mapping outgrowth of land fisheries. By knowing the distribution of potential areas, Regional Government of north Lampung Regency can make appropriate policies for the next development planning.
ANALISA SPASIAL PERUBAHAN PENGGUNAAN TANAH DI SEKITAR LAGUNA SEGARA ANAKAN KABUPATEN CILACAP - PROVINSI JAWA TENGAH Irwansyah, Edy
MAJALAH ILMIAH GLOBE Vol 12, No 1 (2010)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.363 KB) | DOI: 10.24895/MIG.2010.12-1.113

Abstract

Luas penggunaan tanah mangrove di Laguna Segara Anakan mengalami fluktuasisignifikan yang diakibatkan oleh tingginya frekuensi penebangan mangrove disamping tumbuhnya mangrove pioner pada dataran pasang surut yang makin bertambah luasannya. Analisis data berbasis sistem informasi geografis (SIG) telah memperlihatkan bahwa selama periode 1940 – 1999 telah terjadi konversi hutan mangrove menjadi penggunaan tanah lain seluas 14.677 ha. Perubahan ini mengakibatkan terjadinya pertambahan dataran pasang surut seluas 3.297 ha.Kata Kunci : Perubahan Penggunaan Tanah, Laguna, Mangrove, Sistem InformasiGeografisABSTRACTWidth of mangrove in Segara Anakan Lagoon significantly due to high frequency mangrove cut off in one side and new mangrove pioneer in other side. Data analysis based on geographical information system (GIS) have showed that during period 1940 – 1999. Mangrove was converted to other landuse for the area of 14.677 ha. This results in tidal flat accretion of 3.297 ha.Keyword : Landuse change, Lagoon, Mangrove, Geographic Information Syste