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INDONESIA
JURNAL ILMIAH GEOMATIKA
Published by Badan Informasi Geospasial
ISSN : 08542759     EISSN : 25022180     DOI : -
Core Subject : Science, Education,
Earth & Planetary Sciences Mathematics
Geomatika (can be called Jurnal Ilmiah Geomatika-JIG) is a peer-reviewed journal published by Geospatial Information Agency (Badan Informasi Geospasial-BIG). All papers are peer-reviewed by at least two experts before accepted for publication. Geomatika will publish in two times issues: Mei and November.
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Articles 9 Documents
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Search results for , issue " Vol 16, No 1 (2010)" : 9 Documents clear
FOREST DEGRADATION ASSESSMENT IN KALIMANTAN TROPICAL RAIN FOREST (KTRF) USING PHENOLOGICAL AND GEOMETRICAL SHAPE ANALYSIS Darmawan, Mulyanto
GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24895/JIG.2010.16-1.13

Abstract

Kalimantan tropical rain forest (KTRF), for many years, has been subject for timber extraction, agriculture and plantation expansion, as well as settlement. Although it has experiencing ever land clearing, forest degradation both in spatial and temporal are poorly studied. Many researchers’ works in the forest field had considered that forest degradation is similar to deforestation. They defined a simple definition of deforestation as “conversion of forest”. When such definition applied, it would create large area of forest degradation. In this study phenological analysis were applied to scale up the understanding of forest degradation in KTRF. In the initial stage, phenological analysis was evaluated using NDVI SPOT Vegetation 10 days composite. Secondly, K-mean classification and Knowledge Base Expert System (KBSE) method were applied to nine phenological metrics (Onset, End, Max, Min, AMP, RtUp, RtDn, and DUR, TIN) to calculate proportion of forest (Pof) and connectivity of forest with other non forest (Cof). Finally, the Geometrical shapes of forest were evaluated to understand forest degradation in Kalimantan forest. Result found that about 46% of Kalimantan forest has been threatened or experience with forest clearance which correspond to plantation and agriculture crops for 26,76% and of 19,24% was patch forest. While the other of 53% was represent natural forest. Of the 53% of the natural forest actually 55% was corresponding to transitional forest, perforated and edge forest at about 8%, 9% and 37% respectively. The critical point found in the phenological analysis mainly to determine the starting point of growing season (Onset) and the end of greenness (End).Keyword: tropical rain forest, deforestation, degradation, phenology analysis, geometrical shapeABSTRAKHutan hujan tropis Kalimantan (KTRF), selama bertahun-tahun, menjadi sumber pengambilan kayu, perluasan pertanian dan perkebunan, termasuk permukiman. Meskipun hutan ini mempunyai sejarah panjang pembukaan lahan (land clearing), informasi tentang degradasi hutan baik secara spasial maupun dan multi waktu sulit didapat. Banyak peneliti di sektor kehutanan menyederhanakan bahwa “degradasi hutan” adalah “deforestasi hutan”. Mereka menetapkan definisi sederhana deforestasi sebagai "konversi hutan". Namun, ketika definisi tersebut diterapkan, akan menghasilkan luasan angka degradasi hutan yang besar. Dalam studi ini phenological analisis dilakukan untuk meningkatkan pemahaman (Scale up) informasi degradasi hutan di KTRF. Pada tahap awal, phenology dievaluasi dengan menggunakan NDVI SPOT Vegetasi 10 hari komposit. Tahap kedua, klasifikasi K-mean dan method Knowledge Base Expert System (KBSE). diterapkan atas sembilan metrik phenologi (Onset, End, MAX,MIN, AMP, End, RtUp, RtDn, dan Dur, TIN) untuk menghitung proporsi hutan (POF) dan konektivitas hutan (COF) dengan hutan non lain (COF). Akhirnya, bentukan geometris (geometris shape of forest) dievaluasi untuk memahami degradasi hutan Kalimantan. Hasil sementara adalah sekitar 46% dari total hutan Kalimantan terancam ataupun mengalami perubahan, akibat adanya pembukaan hutan baik untuk perkebunan atauypun tanaman pertanian masing-masing sebesar 26,76% dan 19,24% diantaranya adalah hutan patch. Sementara hanya 53% wilayah Kalimantan masih merupakan hutan alami (natural forest). Dari 53% dari hutan alami sebenarnya hanya 55%, sementara hutan transisi (transitional forest), hutan perforasi (perforated forest) dan hutan tepi (edge forest) masing-masing sekitar 8%, 9% dan 37% dari ttal forest. Pekerjaan tersulit yang ditemukan dalam analisis phenological ini adalah pada penentukan titik awal musim tanam (Onset) dan akhir kehijauan (O). Setelah kedua metrik tersebut ditentukan, maka metrik yang lain dapat dihitung.Kata Kunci: Hutan hujan tropis, deforestasi, degradasi, phenologi analisis, bentukan geometrik
PENENTUAN LANDAS KONTINEN EKSTENSI BATAS MARITIM INDONESIA-PALAU PADA KEDALAMAN 2500 M ISOBATHS + 100 NM DI SEBELAH UTARA PAPUA MENGGUNAKAN BATIMETRI TURUNAN DATA PENGINDERAAN JAUH Julzarika, Atriyon; Susanto, Susanto
GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24895/JIG.2010.16-1.18

Abstract

Northern Papua Indonesia is a region that directly adjacent to Palau in Pasific Ocean. This condition allows Indonesia to claim maritime boundary delimitation according to Technical Aspect of the Law of the Sea (TALOS), one of TALOS concept is to determine extended continental shelf in -2500 m depth isobaths + 100 nm in 1% sedimentary rock. This extended continental shelf can be determined by using bathymetry that is derived from altimetry satellite imagery. The establishment of this bathymetry has the same concept with topography in the case of survey mapping and remote sensing. Those bathymetry can be applied to determine another maritime boundary delimitation claims. Besides that, those bathymetry can also be applied to make a 3D model of bathymetry in Pasific Ocean so we can observe the condition of internal waters, medium and depth waters in the northern Papua Indonesia. This bathymetry will be useful for various engineering applications and some other of non engineering applications. This 3D model of bathymetry will be useful for Indonesia in claiming maritime boundary delimitation in Pasific Ocean and to improve marine resources management.Keywords : Bathymetry, Northern Papua, extended continental shelfABSTRAKWilayah Papua utara Indonesia merupakan kawasan yang berbatasan langsung dengan Palau di Samudera Pasifik. Kondisi ini memungkinkan Indonesia dapat mengklaim batas maritim sesuai dengan yang terdapat di Technical Aspect of the Law of the Sea (TALOS). Salah satunya adalah penentuan batas landas kontinen ekstensi pada kedalaman -2500 m isobaths + 100 nm pada sedimentasi 1%. Batas landas kontinen ini dapat ditentukan menggunakan data batimetri yang diturunkan dari citra satelit Altimetri. Pembuatan batimetri ini memiliki konsep yang sama dengan pembuatan topografi secara survei pemetaan maupun secara penginderaan jauh. Batimetri tersebut bisa digunakan untuk penentuan klaim batas maritim lainnya. Selain itu, batimetri tersebut bisa juga digunakan untuk pemodelan 3D perairan di Samudera Pasifik sehingga akan terlihat kondisi perairan dangkal, sedang, dan dalam yang ada di sebelah utara Papua. Batimetri ini akan berguna dalam berbagai aplikasi keteknikan dan non keteknikan lainnya. Pemodelan 3D perairan ini akan berguna bagi Indonesia dalam klaim batas maritim di Samudera Pasifik dan dalam pengelolaan sumber daya alam laut.Kata kunci: Batimetri, Papua Utara, landas kontinen ekstensi
IMPLIKASI OTONOMI DAERAH TERHADAP PERUBAHAN LAHAN BERDASARKAN DATA PENGINDERAAN JAUH Susantoro, Tri Muji
GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24895/JIG.2010.16-1.14

Abstract

Regional development in the era of autonomy have implications for land use change, primarily related to natural resource management and settlement development. In the case study in Samarinda and surrounding areas using Landsat 7 ETM + year 2001 and ASTER Year 2009 obtained data on large enough of land use change in the plantation, mining and settlements as well as an increase in sport facilities with the construction of two stadiums. The plantation have the addition of wide around 16.950,30 hectares. The addition of plantation is caused by the opening oil palm plantations that converts the forest, bareland and shrubs. Settlements is increasing widely from the existing locations. Coal mining is increasing after regional autonomy. The location of coal concession (KP) and Coal Contracts of Works (PKP2B) are spreading around the city of Samarinda. Based on the interpretation of Landsat 7 ETM + of year 2001, the wide of coal mining area is 6.256,82 hectares and in the year 2009 based on ASTER interpretation was increased to 17.221,60 hectares or increased about 10.964,86 hectares. Water body such as lakes, dams or slicks in the year 2001 have an area about 524.69 hectares and in the year 2009 increased 364.09 hectares. Water body in Landsat imagery in year 2001 which located at the coal mining area about 373.27 hectares. The open mining of coal is making many slicks of ex-mining location. Despitfully, the landscape changes and the possibility of erosion that can make the river more shallow and the collapse of the slope at ex-mining areas.Keywords: Landsat 7ETM+, ASTER, regional Autonomy, Coal mining, Wide change.ABSTRAKPerkembangan daerah pada era otonomi mempunyai implikasi terhadap perubahan lahan, terutama terkait dengan pengelolaan sumber daya alam dan perkembangan permukiman. Pada studi kasus di Kota Samarinda dan sekitarnya dengan menggunakan Citra Landsat 7ETM+ Tahun 2001 dan ASTER Tahun 2009 diperoleh data mengenai perubahan lahan yang cukup besar di sektor perkebunan, pertambangan dan permukiman serta adanya peningkatan fasilitas olahraga dengan dibangunnya dua stadion. Perkebunan mengalami penambahan luas mencapai 16,950.30 Ha yaitu dengan dibukanya perkebunan kelapa sawit yang mengkonversi hutan, tanah terbuka dan semak belukar. Permukiman mengalami penambahan luas yang berkembang dari lokasi yang sudah ada. Pertambangan batubara semakin meningkat dengan adanya otonomi daerah. Lokasi Kuasa Pertambangan (KP) dan PKP2B batubara menyebar di mengelilingi kota Samarinda. Berdasarkan interpretasi citra landsat 7ETM+, pada tahun 2001 tambang batubara existing seluas 6.256,82 hektar, sedangkan pada tahun 2009 berdasarkan citra ASTER bertambah menjadi 17.221,69 hektar atau bertambah sekitar 10.964,86 hektar. Tubuh air berupa danau, waduk atau genangan pada tahun 2001 mempunyai luas 524.69 hektar dan pada tahun 2009 bertambah 364.09 hektar menjadi 888.78 hektar. Tubuh air pada citra landsat tahun 2001 yang berada di lokasi tambang batubara seluas 373.27 Hektar. Adanya penambangan batubara yang bersifat terbuka maka meninggalkan banyak bekas tambang yang berubah menjadi genangan air. Disamping perubahan bentang alam dan kemungkinan erosi yang dapat menyebabkan pendangkalan sungai serta keruntuhan lereng pada daerah bekas pertambanganKata Kunci: Landsat 7ETM+, ASTER, Otonomi Daerah, Pertambangan Batubara, Perubahan Luas.
ASSESSMENT OF THE RICE FIELD SUSTAINABILITY IN JAVA ON BASIS OF REGIONAL SPATIAL USE PLANNING (RTRW) Nurwadjedi, Nurwadjedi; Mulyanto, Budi; Poniman, Aris
GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (336.946 KB) | DOI: 10.24895/JIG.2010.16-1.10

Abstract

The problems of the rice field sustainability in Java as the national rice producer are induced by the rice field land conversion into settlement and industrial areas due to the increase of population. The rice field conversion causes the decrease of both land quantity and quality. As mentioned in Act Number 26/2007 concerning Spatial Use management, the goal of implementing the spatial use management is to achieve the protection of spatial use function and the prevention of the negative impacts of the environment resulted from the spatial use implementation. The objective of this study is to assess the consistency of the governmental policies in implementing the Act Number 26/2007 to achieve the rice field sustainability on the basis of agro-ecological concept. By using the GIS modelbase, the rice field agro-ecological zones proposed as standard rice field areas for the benchmark of the sustainable rice field agriculture management system were synthesized from the spatial database of land system, land cover, area status, agro-climate, irrigation condition, social and culture integrated in the administration boundary layers. The results show that the governmental policies from non-agricultural sector in allocating the area status of the settlement areas as presented at the provincial regional spatial use planning map (RTRW map) have not fully consistent to the regulations as stated in Act Number 26/2007 for protecting the productive rice field function as the national rice producer. The potential loss of the rice production caused by the implementation of the rice field conversion into settlement areas allocated at the productive rice field agro-ecological zones is predicted 3.5 million tons per year.Key words: rice field agro-ecological zone, spatial use management, GIS modelbase, land conversion.ABSTRAKMasalah keberlanjutan lahan sawah di Jawa sebagai lumbung beras nasional dipicu oleh konversi lahan sawah menjadi daerah permukiman dan industri karena peningkatan jumlah penduduk. Konversi lahan sawah mengakibatkan penyusutan dan degradasi lahan sawah. Sebagaimana yang diamanatkan dalam Undang-Undang No.26/2007 tentang Penataan Ruang, tujuan penataan ruang adalah untuk melindungi fungsi penggunaan ruang dan mencegah dampak lingkungan sebagai akibat dari implementasi penggunaan ruang. Tujuan penelitian ini adalah untuk mengkaji konsistensi kebijakan pemerintah sebagai implementasi Undang-Undang No. 26/2007 dalam menjaga keberlanjutan lahan sawah berdasarkan konsep agrokologi. Dengan menggunakan basismodel SIG, zona agroekologi yang diusulkan sebagai acuan untuk penetapan luasan baku lahan sawah disintesa dari basisdata sistem lahan, penutup lahan, status kawasan, agroklimat, kondisi irigasi, dan sosial-budaya yang diintegrasikan dalam layer batas wilayah administrasi. Hasil penelitian menunjukkan bahwa kebijakan pemerintah di sektor non-pertanian dalam pengalokasian status kawasan permukiman ternyata tidak secara penuh konsisten dengan Undang-Undang No.26/2007 dalam menjaga keberlanjutan lahan sawah produkif sebagai lumbung beras nasional. Potensi kerugian proudksi beras dari akibat implementasi kebijakan tersebut diperkirakan mencapai 3,5 juta ton per tahun.Kata Kunci: zona agroekologi lahan sawah, penataan ruang, basismodel SIG, konversi lahan.
LINEAR FEATURE EXTRACTION FROM FORMOSAT-2 IMAGE FOR TOPOGRAPHIC MAP UPDATE Wijanarto, Antonius B; Rahadian, Yusuf
GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24895/JIG.2010.16-1.15

Abstract

Aerial or satellite remote sensing is rapidly being applied to map updating, and in other regions, most map series have been partly or fully digitized. It is important to update maps because nowadays, many countries face problems in relation to outdated topographic maps. In this paper FORMOSAT-2 images used as reference. This is based on the consideration that the image of FORMOSAT-2 has a high resolution, so that is expected to provide more accurate information than the previous RBI map. The aim of this work is to extract linear features such as road and river from FORMOSAT-2 image for topographic map updating.Keywords: Topographic Map, Map Update, FORMOSAT-2 Image.ABSTRAKPenginderaan jauh maupun foto udara telah diaplikasikan dengan cepat untuk pemuktahiran peta, dan di daerah lain kebanyakan peta-peta serial sebagian atau secara menyeluruh digitasi. Penting untuk memuktahirkan peta karena akhr-akhir ini banyak negara menghadapi maslah terutama dengan pemuktahiran peta topografi. Makalah ini membahas citra FORMOSAT-2 yang mempunyai resolusi tinggi, yang diharapkan dapat menyediakan informasi yang lebih akurat dari pada peta topografi sebelumnya. Tujuan dari kegiatan penelitian ini adalah mengekstrak fitur linear seperti jalan dan sungai dari citra FORMOSAT-2 untuk pemuktahiran peta topografi.Kata kunci: Peta topografi, pemuktahiran peta, FORMOSAT-2
DYNAMIC MODEL OF FLOOD AND TIDAL INUNDATION VULNERABILITY IN LOWLYING AREA, CASE STUDY AT SEMARANG Suhelmi, IR; Fahrudin, A; Yulianda, F; Nuitja, INS
GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (531.61 KB) | DOI: 10.24895/JIG.2010.16-1.11

Abstract

Global warming will raise sea level, Intergovernmental Panel on Climate Change (IPCC) estimates that the water level rise globally from 1990 to 2100 will reach 23-96 cm. While the increase in world temperature over this time period of about 2oC to 4.5oC (IPCC, 1995). Due to an increase in sea water is a phenomenon of erosion and puddles in the coastal areas and loss of wetland that is rich in biodiversity. Semarang topography sloping to the slope tends to 0-2% with most of the area is almost the same height as the sea level and even in some places below him. In this way, the topography of the vulnerability to natural phenomena became increasingly large. This vulnerability becomes higher because of the phenomenon that the amount of land subsidence reach 15-25 cm per year. This paper will discuss various matters related to develop model of inundation caused by tidal inundation and the local flood. This paper will study various factors that affect the inundation of tidal flood that includes land subsidence, sea level rise and hight of tides. The study will use spatial data such as satellite imagery, Digital Elevation Model (DEM) and processed with Geographic Information Systems (GIS). Rainfall data, changes of landuse, run off and drainage capacity to help in building the models.Keywords: Dynamic Model, Inundation, Tidal Flood, Flood, DEMABSTRAKPemanasan global menyebabkan kenaikan permukaan laut, IPCC memprediksikan tingkat kenaikan air laut secara global rentang waktu 1990-2100 mencapai 23-96 cm. Peningkatan suhu dunia selama jangka waktu tersebut sekitar 2oC untuk 4.5oC (IPCC, 1995). Semarang, khususnya kota bawah, memiliki topografi yang datar antara 0-2% yang menjadikan kota ini sangat rentan terhadap fenomena kenaikan muka air laut. Kerentanan menjadi lebih tinggi dengan adanya fenomena amblesan tanah (land subsidence) yang mencapai 15 cm per tahun pada lokasi-lokasi tertentu. Tulisan ini akan membahas berbagai hal yang terkait model genangan yang disebabkan oleh banjir rob dan banjir lokal. Faktor yang mempengaruhi genangan rob meliputi penurunan tanah, kenaikan permukaan laut dan pasang surut air laut. Penelitian ini menggunakan data spasial seperti citra satelit, Digital Elevation Model (DEM) dan diproses dengan Sistem Informasi Geografis (GIS). Data curah hujan, perubahan tata guna lahan dan kapasitas drainase digunakan untuk membantu dalam membangun model.Kata Kunci: Model Dinamik, Kenaikan Permukaan Laut, Pasang Surt, Banjir, DEM
MEMBANGUN SISTEM PEMETAAN DARI UDARA BERBIAYA RENDAH DENGAN WAHANA UDARA NIR-AWAK MINI Rokhmana, Catur Aries
GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24895/JIG.2010.16-1.16

Abstract

The production for 1/1.000 -1/2.500 scale maps are still done by the aerial photography or survey methods terrestrial which are not cheap. This paper describes an alternative aerial mapping system which is relatively less expensive to produce large scale maps (1/1.000 - 1/5.000) using unmanned aerial vehicle (UAV). For keeping the lowest cost, the instrumentation build from the stuff that exist in the market such as aeromodeling and digital cameras. For supporting the operational of this system, the database of Indonesian territory was build also. This system consists of several modules namely (1) air vehicle, (2) imaging sensors and the stand, (3) data processing and visualization of results; (4) ground station, and (5) database. This system has been tested to produce the photomaps scale 1/2.500. Geometric quality improvements made possible by conducting the process of camera calibration with "in-flight calibration" technique. In the future is still required number of experiments to test the performance of this system from a practical aspect.Keywords: large scale mapping system, un-manned vehivles, photogrammetry.ABSTRAKKebutuhan produk Peta skala 1/1.000 –1/2.500 sampai saat ini masih dilakukan dengan metode foto udara atau survei terestris yang tidak murah. Tulisan ini menjelaskan suatu alternatif sistem pemetaan dari udara yang relatif lebih murah untuk produksi peta skala besar (1/1.000 – 1/5.000) dengan memanfaatkan wahana udara nir-awak. Biaya rendah diperoleh dari penggunaan instrumentasi yang banyak di pasaran seperti aeromodeling dan kamera digital. Guna mendukung keperluan operasional dari sistem ini, dibangun suatu basisdata spasial rupa bumi wilayah Indonesia. Sistem ini terdiri dari sejumlah modul yaitu (1) wahana udara; (2) sensor pencitraan dan dudukannya; (3) pemrosesan data dan visualisasi hasil; (4) ground station; dan (5) basidata rupabumi. Sistem ini telah dicobakan untuk produksi peta foto skala 1/2.500. Perbaikan kualitas geometrik dimungkinkan dengan melakukan proses kalibrasi kamera dengan teknik “in-flight calibration”. Dimasa mendatang masih diperlukan sejumlah percobaan untuk menguji kinerja sistem ini dari aspek praktis.Kata Kunci: sistem pemetaan skala besar, wahana nir-awak, fotogrametri
EKSTRAKSI KANDUNGAN AIR KANOPI DAUN TANAMAN PADI DENGAN DATA HYPERSPECTRAL Wibowo, Agus; Ratnasari, Dian; Sukojo, Bangun Muljo; Harianto, Teguh; Djajadihardja, Yusuf S.
GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.784 KB) | DOI: 10.24895/JIG.2010.16-1.12

Abstract

The spectral reflectance of leaves from several paddy stumps in irrigated rice area of Indramayu - West Java Province was measured with field spectrometer which has wavelength range 350-2500 nm and spectral resolution of 1 nm. The measurement was performed from a distance of 10 cm (FS10) and 50 cm (FS50) of rice leaf canopy surface. Measurement point is selected such that represent different stages of rice growth i.e. vegetative, reproductive and ripening. Meanwhile, a airborne survey with hyperpectral mapper (HYMAP) sensor is done over the same area. The HYMAP sensor has wavelength length from 400-2500nm, 128 channels, 10-20 nm spectral resolution, and 4.5 m spatial resolution. Clumps of rice that has been measured withdrawn and separated into the leaf, stem and panicle. Those sample are weighed as fresh weight and then dried in the laboratory until the temperature of 60 ° C. The canopy water content is the difference between fresh weight and dry weight. Linear regression modeling is performed to find the relationship between canopy water content (CWC) with water index (R900/R970) and the normalised difference water index (R860-R1240)/(R860-R1240). To obtain a good model of cross-validation process is carried out by separating 30% of data randomly for validation and the remaining 70% is used to build the regression model. Furthermore, the resulting model is validated with 30% of data, good model selected by the criteria of a maximum of R2 model and the RMSE of cross validation (RMSEVC) minimum. Selected regression model was applied to the data HYMAP to create distribution maps of canopy water content. Results show that both spectral indices shows a positive correlation and also sensitive to changes in water content that make the detection of canopy water content is possible. Selected model that can be used are (1) CWC = 13078.0 * WI - 13183.00 (R2 = 0:58, RMSECV = 499.13) and (2) CWC = 7157.4 * NDWI + 396.26 (R2 = 0:51, RMSECV = 640.84). Selected model is implemented with HYMAP data to produce a canopy water content distribution map. The result shows that both spectra indices has a negative value that represent a dry land. High spectral indices value also identified in a vegetative growth stage which is sparse rice canopy and mixed with water or soil background. Wider implementation should be done cautiously and need improvements to accommodate the level of the leaf canopy cover.Keywords: Remote Sensing, Hyperspectral, Paddy/Rice, Canopy Water Content, HYMAP, Field Spectrometer.
MORFODINAMIKA DELTA CIMANUK, JAWA BARAT BERDASARKAN ANALISIS CITRA LANDSAT Solihuddin, Tb.
GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24895/JIG.2010.16-1.17

Abstract

Delta Cimanuk merupakan delta dari sungai terpanjang kedua di Jawa Barat. Panjang aliran Sungai Cimanuk ± 250 km, hulunya berada di sekitar Kabupaten Garut melalui Kabupaten Sumedang dan Majalengka bermuara ke Laut Jawa di utara. Studi tentang morfodinamika Delta Cimanuk bertujuan untuk mengetahui dinamika dan evolusi Delta Cimanuk berdasarkan analisis citra landsat tahun 1991, 2001 dan 2007. Bentuk geometri Delta Cimanuk yang bertipe telapak kaki burung menunjukkan bahwa proses darat – laut lebih kuat dibandingkan dengan proses laut. Kajian morfologi menunjukkan perubahan menyolok pada lingkungan muara delta akibat pengikisan gelombang dan arus sejajar pantai. Analisis perubahan garis pantai menunjukkan proses abrasi di sekitar muara S. Cimanuk ± 56,25 m/tahun, muara S. Pancersong ± 25 m/tahun dan teluk Pancerpayang ± 12,5 m/tahun, sedangkan sedimentasi terjadi di teluk Pancersong ± 23,75 m/tahun. Proses erosi pantai mengakibatkan luas delta berkurang ± 1,6 ha/tahun. Penurunan pasokan sedimen S. Cimanuk banyak disebabkan oleh aktivitas manusia, seperti pembuatan sudetan pada badan sungai untuk menghindari banjir, juga pembuatan bendungan untuk keperluan pengairan sawah dan irigasi. Kata kunci : erosi, sedimentasi, morfodinamika delta, analisis citra Landsat.ABSTRACTCimanuk Delta is a delta from the second longest river in West Java. The length of Cimanuk river is ± 250 km beginning at the Garut Regency through Sumedang and Majalengka going north to the Java Sea. The aim of this study is to investigate the dynamic and evolution of Cimanuk Delta based on landsat image analysis (acquisition year 1997, 2001 and 2007). Geometry of the Cimanuk Delta is a birdfoot-type delta, indicating that the fluvio-marine processes is stronger than marine processes. Morphology of the estuary environment of Cimanuk Delta has changed extremely because of wave and longshore current erosion. Coastline changes analysis indicate that erosion occurred during 1991–2007 at Cimanuk estuary with rate of ± 56,25 m/year, Pancersong estuary with rate of ± 25 m/year and Pancerpayang bay with rate of ± 12,5 m/year. Meanwhile, sedimentation occurred at Pancersong bay with rate of ± 23,75 m/year. The area of delta shows that retrogradation occurred about ± 1,6 ha/year. The degradation of sediment supply dominantly caused by human artificial. Canal and dam were built on Cimanuk River to avoid flood hazard and farm land watering and irrigation.Keywords: erosion, sedimentation, delta morfodynamic, Landsat image analysis

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