Articles

Inventarisasi Tumbuhan Kantung Semar (Nepenthes spp.) di Lahan Gambut Bukit Rawi, Kalimatan Tengah

Biospecies Vol 6, No 01 (2013)
Publisher : Biospecies

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Abstract

Gambut merupakan salah satu ciri khas tanah di wilayah Bukit Rawi Kalimantan Tengah  dengan jenis tanah gambut ombrogen yang miskin unsur hara.   Salah satu jenis tumbuhan yang beradaptasi dengan baik pada kondisi tanah gambut adalah kantung semar. Berdasarkan hasil inventarisasi di wilayah Bukit Rawi menunjukkan bahwa terdapat tiga jenis  tumbuhan  kantung  semar yaitu  N. mirabilis, N. reinwardtiana, dan N. gracilis.

Pendekatan Aspek Hukum, Geomorfologi, dan Teknik Dalam Penentuan Batas Wilayah Laut Daerah

BULETIN OSEANOGRAFI MARINA Vol 1, No 1 (2011): Vol 1, No.1, Oktober 2011
Publisher : BULETIN OSEANOGRAFI MARINA

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Abstract The Indonesian Decree No 32 / 2004 related to the Local Authority justified the coastal region management to the province and or region. The Government law related to the coastline determination is not yet defined. Due to the problem, the international procedure of the coastline determination were descriptively analyzed base on the sea law, geomorphology and plan mapping.Key-words : regional coast line, maritime line, international sea law 

Analisis Perubahan Garis Pantai selama 10 Tahun Menggunakan CEDAS (Coastal Engineering Design and Analisys System) di Perairan Teluk Awur pada Skenario Penambahan Bangunan Pelindung Pantai

BULETIN OSEANOGRAFI MARINA Vol 1, No 1 (2011): Vol 1, No.1, Oktober 2011
Publisher : BULETIN OSEANOGRAFI MARINA

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Abstract  Live Environment Mining and Energy Duty Kabupaten Jepara (2006) said Teluk Awur shore is potential area occurred erosion. Reliable attempted to use preventing the problem is protecting with making hard struktur, therefore investigated with modeling shoreline changed use protection structure added three scenarios. The purpose of this study to known shoreline changed and the smallest effect in the scenario of protection structure added. For the efficiency time and price, so that prediction and simulation is done with using numeric model method with GENESIS (GENEralized model for SImulating Shoreline change). GENESIS is the one of subprogram in the NEMOS(Nearshore Evolution MOdeling System) at the CEDAS (Coastal Engineering Design and Analisys System) software. Long of the model simulation area is 8720 meters. Model simulation use three scenarios are Detached Breakwater, Non Diffracting Groin, and Detached Breakwater and combination of Non Diffracting Groin. and Detached Breakwater. Shoreline changed can consider based on simulation result is sediment transport volume, erosion wide, sedimentation and long shoreline changed. Based on result simulation, shoreline changed in existing condition is the most if compared with the other scenario with values-93.5942 meters, the smallest values occurred at the combination scenario from Detached Breakwater and Non Diffracting Groin with -54.3157 meters. This result give the information that protection structure required to decrease shoreline changed occur.   Key Words: Shoreline Change, CEDAS, NEMOS, GENESIS, Teluk Awur, Detached Breakwater, Non Diffracting Groin   

Struktur Komunitas Padang Lamun di Perairan Pulau Kumbang, Kepulauan Karimunjawa (Seagrass Community Structure of Kumbang Waters-Karimunjawa Islands)

ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 4 (2012): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

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Abstract

Lamun merupakan salah satu ekosistem yang berperan penting dalam kehidupan di laut. Penelitian ini bertujuan untuk mengetahui struktur komunitas lamun di Perairan Pulau Kumbang Karimunjawa. Pengamatan lamun di lapangan meliputi identifikasi jenis-jenis lamun, menghitung jumlah individu/tegakan, presentase penutupan dari masing-masing jenis/spesies pada transek. Persen penutupan lamun diamati dengan menggunakan transek kuadrat ukuran 1 x 1 m pada hamparan lamun. Transek ini dibagi menjadi 25 buah kisi ukuran 20 cm2. Satu tegakan lamun merupakan suatu kumpulan dari beberapa daun yang pangkalnya menyatu. Jumlah tegakan diamati langsung dengan visual. Hasil penelitian menunjukkan bahwa Komunitas lamun di perairan kawasan Pulau Parang, Karimunjawa, tergolong komunitas campuran (mixed community) yang terdiri dari 1–5 jenis lamun. Telah ditemukan 6 jenis lamun, yaitu Thalassia hemprichii, Cymodocea rotundata, C. serrulata, Halodule pinifolia, Halodule uninervis dan Halophila ovali di perairan Pulau Kumbang, C. serrulata hanya ditemukan pada saat sampling ke dua bulan September 2012. Pada sampling pendahuluan (Juni 2012), jumlah kerapatan jenis lamun (Tegakan/m²) T. hemprichii merupakan yang tertinggi (77.11) sedangkan yang terendah adalah H. pinifolia (0.56). pada sampling kedua, H. uninervis lebih tinggi dari pada T. hemprichii. Frekuensi jenis lamun pada sampling bulan Juni dan september 2012 yang menunjukkan nilai 0-15,67 dan 0-16 dengan T. hemprichii ditemukan lebih sering dari pada jenis lamun yang lain pada kedua waktu sampling. Penutupan spesies lamun (%/m2) pada sampling bulan Juni dan September 2012 menunjukkan nilai 0,11–15.67 dan 0-29.29. Thalassia hemprichii dan Halodule uninervis mempunyai rata-rata penutupan yang tertinggi masing-masing pada sampling September dan Juni 2012.Kata kunci: lamun, jenis, kerapatan penutupan, Pulau Kumbang, KarimunjawaSeagrass is found in shallow waters that have an important role in marine life and is one of the most productive marine ecosystems. This study aims to determine the structure of seagrass communities in Kumbang Island, Karimunjawa. Data collected during observations in the field include species identification, number of individual/stand, percent cover of each species. Percent cover of seagrass was observed by using square transect with size of 1x1 m. Transect was divided into 25 pieces of smaller size i.e. 20 cm2. The stands of seagrass is a collection of several fused leaf base. The number of stands were directly counted. Sampling were done twice i.e. June and September 2012. The results showed that the seagrass community in the waters of Kumbang island, Karimunjawa, can be classified as mixed community consisting of 1-5 types of seagrass. In total, six species of seagrass were found in the area i.e. Thalassia hemprichii, Cymodocea rotundata, C. serrulata, Halodule pinifolia, Halodule ovali and Halophila uninervis. C. serrulata was only discovered during second sampling in September 2012. In the first sampling (June 2012), the density of seagrass (stand/m²) T. hemprichii was the highest (77.11), while the lowest was H. pinifolia (0.56). The results of second sampling showed that H. uninervis was found to be higher than T. hemprichii. Frequency of seagrass types in June and September 2012 showed the value from 0 to 15.67 and 0-16 with T. hemprichii was found more frequently than other types of seagrass during both sampling time. Percent coverage of seagrass species (%/m2) during June and September 2012 showed the value of 0,11-15.67 and 0-29.29, respectively. T. hemprichii and H. uninervis have the highest average percent cover in September and June 2012 sampling.Key words: seagrass, type, density, Kumbang Island, Karimunjawa

Efektivitas Herbisida IPA Glifosat 486 SL Untuk Pengendalian Gulma Pada Budidaya Tanaman Karet (Hevea brasiliensis Muell. Arg) Belum Menghasilkan

Agrohorti Bulletin (e-Journal) Vol 2, No 1 (2014): Januari 2014
Publisher : Agrohorti Bulletin (e-Journal)

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Abstract

Penelitian dilakukan di perkebunan PTPN VIII Cikumpay Kabupaten Purwakarta, Jawa Barat, pada bulan September 2012 sampai Desember 2012. Penelitian ini dilakukan untuk menguji efektivitas herbisida IPA glifosat 486 SL. Rancangan percobaan yang digunakan dalam penelitian ini adalah Rancangan Kelompok Lengkap Teracak (RKLT) dengan satu faktor. Penelitian ini menggunakan 7 perlakuan dengan empat ulangan. Perlakuan dosis IPA glifosat 486 SL yang diberikan adalah 1.0 l ha-1 (P1), 1.5 l ha-1 (P2), 2.0 l ha-1 (P3), 2.5 l ha-1 (P4), 3.0 l ha-1 (P5), Penyiangan Manual (P6), dan Kontrol (P7). Herbisida IPA glifosat 486 SL tidak efektif menekan pertumbuhan gulma di perkebunan karet belum menghasilkan. Perhitungan rata-rata perlakuan herbisida pada setiap dosis tidak menunjukan perbedaan yang nyata walaupun secara umum terjadi penurunan berat kering gulma pada setiap perlakuan. Selama pengamatan tidak ditemukan gejala keracunan pada tanaman karet untuk setiap perlakuan dosis. Hal tersebut menunjukan bahwa aplikasi herbisida IPA glifosat 486 SL tidak berbahaya pada tanaman karet belum menghasilkan.

Evaluasi Kesesuaian Tambak Garam Ditinjau Dari Aspek Fisik Di Kecamatan Juwana Kabupaten Pati

Journal of Marine Research Vol 1, No 2 (2012): Journal of Marine Research
Publisher : Journal of Marine Research

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Salt is one of the national strategic commodities in the field of marine. Effort to increase the quantity and quality of salt production has not been a priority for farmers in Juwana. It examined regarding evaluated the suitability of the physical land of salt embankment in Pati Juwana to approach some of the factors are soil permeability, climatology, soil type and topography of the form. The purpose of this research is to know and study the suitability of the salt level land embankment in district Juwana, Pati. This research using several physical analysis of the permeability of soil, land forms and types, climatic conditions and scoring physical suitable of salt embankment. The results of this study indicate that the suitability of physical salt embankment in Juwana, Pati has a physical suitability class is very suitable (S1) to produce a national salt.

Studi Kesesuaian Perairan Pulau Pisang Bagian Timur Untuk Perencanaan Wisata Bahari Selancar Air, Olahraga Air Banana Boat dan Jet Ski, Kabupaten Lampung Barat, Provinsi Lampung

Journal of Marine Research Vol 2, No 3 (2013) : Journal of Marine Research
Publisher : Journal of Marine Research

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Banana Island is one destination that superior Lampung attractions and is a tourist attraction in West Lampung regency which has considerable potential as one of the coastal resorts.This study aims to identify and assess physical potential of Cape Coast Faithful as marine tourism area.This study aims to identify and assess the potential physical Banana Island as a marine tourism area.This study was conducted in July-August 2011, this is because the month is a transition season, which allegedly started the season many tourists flock to Banana Island for a tour. The method used in this research is descriptive exploratory method.The analysis used in this study is an analysis of the suitability of travel, ie by comparing the characteristics and quality of the waters of the requirements for the use of waters of certain tourist activities. Results of the study showed that the physical conditions potentially Banana Island waters as marine tourism area, with several activities, namely water surfing (surfing), and water sports (Water Sports) ie banana boat and jet ski. Based on the value IKW for surfing activities (Surfing) in the category of S1-class (very appropriate) with IKW value by 86%, while for the water sports activities (Water Sport) ie banana boat and jet ski into the category of S1-class (very appropriate ) with IKW value of 81%.

ANALISIS KESESUAIAN PERAIRAN UNTUK WISATA SNORKELING DAN DIVING DI PULAU PISANG BAGIAN UTARA KECAMATAN PESISIR UTARA LAMPUNG BARAT

Journal of Marine Research Vol 2, No 3 (2013) : Journal of Marine Research
Publisher : Journal of Marine Research

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Pisang Island is one of the islands located in the Coastal West Lampung regency precisely in West Lampung. Expected with the development of Pisang Island as a tourist destination it will beable to increase revenue and the welfare of society in western Lampung. Utilization of coastal and marine resources in West Lampung could be the development of nautical tourism in the region in this regard Pisang Island. One form of nautical tourism is snorkeling and diving activities. However, in the tourist development efforts in Pisang Island have held identification and approach problems first. The most fundamental and the purpose of this studyis to conducta study on the suitability of water level in Pisang Island, especially for snorkeling and diving tourism activities. Research carried out by field observations (collecting primary data and secondary data) for 2 months in July 2011 to August 2011 in the northern part of the Pisang Island, which is divided into thirteen point sampling locations. Primary data collection consisted of coral cover data retrieval and type of life formusing LIT, count the number off is husing visual census of fish and measure the brightness levels use these cchidisk. The method used for the analysis of the research is descriptive method of analysis with the help of Travel Suitability Index which produces the suitability andvalue of the carrying capacity of tourist areas. Based on the results obtained from the calculation of travel suitability index for snorkeling and diving touris snorkeling tours there instations 1, 2, 3, and 5 are located at a depth of 3 meters. And for diving there instations 6, 7, 8, 9, 11, 12, 13 and 14 are located at a depth of 5 meter still 10 meters.

Pemetaan Zona Rip Current sebagai Upaya Peringatan Dini Untuk Bahaya Pantai (Lokasi Kajian : Pantai Kuta Bali)

Journal of Oceanography Vol 2, No 2 (2013)
Publisher : Journal of Oceanography

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Abstract

Abstrak                Wisata pantai merupakan wisata favorit yang mengandung resiko tinggi. Bahaya pantai salah satunya adalah kecelakaan yang terjadi di wilayah pantai dan  beberapa kasus kecelakaan yang terjadi di pantai biasanya akibat pengawasan yang lemah, kurangnya pemahaman wisatawan akan bahaya pantai, fasilitas pengawasan yang kurang memadai, atau wisatawan yang tidak dapat berenang kemudian terseret arus sampai ke tengah laut. Menurut Daryono (2010), arus yang membawa korban tersebut adalah Rip Current. Penelitian ini bertujuan untuk Tujuan penelitian ini adalah untuk mengetahui zona potensi rip current, Mengetahui persentase potensi terjadinya rip current di Pantai Kuta Bali. Metode penelitian yang digunakan adalah metode kuantitatif. Hasil penelitian menunjukkan bahwa Pantai Kuta Bali dibagi kedalam 2 (dua) zona, yaitu zona aman dan zona bahaya. Pada zona aman terdapat 2 (dua) pola rip current, karena gelombang yang datang tidak membentuk sudut yang tegak lurus terhadap garis pantai, sedangkan pada zona berbahaya terdapat 7 (tujuh) pola rip current. Persentase terjadinya rip current di sepanjang Pantai Kuta Bali adalah sebesar 83%, nilai ini berdasarkan kejadian gelombang pecah tipe plunging. Slope pantai akan mempengaruhi terjadinya rip current. Pada penelitian ini pantai landai memiliki potensi rip current paling besar yaitu sebesar 91.5% yang memiliki slope sebesar 7.5˚, berada pada koordinat 08˚43’23” LS dan 115˚10’9” BT. Sedangkan, pantai datar memiliki potensi rip current yang kecil yaitu sebesar 51.5% dan memiliki slope antara 0.5˚ sampai 1.8˚.

STUDI SEBARAN SEDIMEN TERSUSPENSI SECARA HORIZONTAL DAN VERTIKAL DI PERAIRAN TUGU KECAMATAN TUGUREJO, SEMARANG

Journal of Oceanography Vol 2, No 3 (2013)
Publisher : Journal of Oceanography

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ABSTRAKMasalah hidrodinamika yang terdapat di Perairan Tugu adalah sebaran sedimentasi yang tidak merata yang mengakibatkan pembelokan di badan sungai dan perubahan alur pelayaran bagi kapal-kapal nelayan untuk memasuki daerah sungai khususnya pada saat perairan sedang surut. Tujuan dilakukannya penelitian ini adalah untuk mengetahui sebaran sedimen tersuspensi secara horizontal dan vertikal di Perairan Tugu.Penelitian ini dilakukan dalam 3 tahap, tahap pertama pengolahan citra satelit ALOS untuk mengetahui sebaran sedimen tersuspensi secara horizontal di Labolatorium Komputasi Jurusan Ilmu Kelautan Universitas Diponegoro, Semarang, pengambilan data yang dilaksanakan pada bulan Maret 2012 di Perairan Tugu dan tahap analisa laolatorium terhadap sampel air untuk mengetahui konsentrasi sedimen tersuspensi di Labolatorium Teknik Lingkungan Universitas Diponegoro, Semarang dan Penelitian ini menggunakan metode deskriptif. Data pengamatan pasang surut tinggi air di Perairan Tugu, Semarang hasil pengukuran Badan Meterologi Klimatologi dan Geofisika, Maritim.Pada saat pasang, nilai konsentrasi sedimen tersuspensi berkisar antara 8.13 mg/L untuk yang terendah dan 18.19 mg/L untuk yang tertinggi. Pada saat kondisi surut didapatkan nilai konsentrasi sedimen tersuspensi sebesar 18.17 mg/L sampai dengan 26.14 mg/L. Nilai konsentrasi sedimen terbesar pada saat pasang maupun surut didapatkan di dasar perairan, yakni sebesar 9.74 mg/L - 25.13 mg/L pada kondisi pasang dan 27.89 mg/L – 35.79 mg/L pada kondisi surut.