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INDONESIA
LIMNOTEK - Perairan Darat Tropis di Indonesia
ISSN : 08548390     EISSN : 25498029     DOI : -
LIMNOTEK Tropical Inland Waters in Indonesia (Limnotek) is a periodical publication from the Research Center for Limnology, Indonesian Institute of Sciences in collaboration with Indonesian Society of Limnology (MLI). Published semiannually, the journal has a goal to be a means of communication and dissemination of research results in tropical limnology. The articles in this journal examines the interaction between factors: physics, chemistry, biology, hydrology, and geology on inland waters ecosystems. Definition of inland waters here are all forms puddles on the surface of the earth to the landward of the line of the lowest tides either fresh or brackish water such as rivers, swamps, lakes, water, wetlands, reservoirs, puddles, ponds, and dams.
Arjuna Subject : -
Articles 109 Documents
KESESUAIAN LAHAN BERDASARKAN INDEKS KONSERVASI SECARA SPASIAL DI DAS CIASEM HULU, SUBANG Lestiana, Hilda; Mulyono, Asep; Maria, Rizka; Mulyadi, Dedi
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 26, No 2 (2019)
Publisher : Research Center for Limnology

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Fenomena alih fungsi lahan hutan dan pertanian menjadi kawasan permukiman, industri dan wisata (kawasan  terbangun) di wilayah pengembangan Jalancagak Kabupaten Subang dari tahun ke tahun relatif cepat. Kecenderungan degradasi lahan  akibat perubahan penggunaan lahan akan terus berlangsung dan sangat perlu mendapat perhatian dikarenakan wilayah ini termasuk ke dalam kawasan resapan air. Kajian kesesuaian lahan berdasarkan perhitungan indeks konservasi telah dilakukan. Indeks konservasi menunjukkan kemampuan suatu wilayah untuk menyerap air hujan yang jatuh kepermukaan tanah dan  menjadi imbuhan air tanah yang dihitung berdasarkan variabel kemiringan lereng, jenis batuan, jenis tanah, curah hujan, dan penggunaan lahan.Penilaian kesesuaian lahan berdasarkan nilai indeks konservasi dilakukan pada tahun 2009, 2014 dan RTRW tahun 2030. Hasilanalisis menunjukkan skenario penggunaan lahan RTRW tahun 2030 mampu mengurangi lahan-lahan yang dikategorikan kritis di wilayah Sub DAS Ciasem hulu dibandingkan dengan tahun 2009 dan 2014.Kata kunci : indeks konservasi, penggunaan  lahan, wilayah pengembangan
DAFTAR ISI LIMNOTEK VOL. 26 DES 2019 Limnotek, Cover
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 26, No 2 (2019)
Publisher : Research Center for Limnology

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Daftar Isi Limnotek Vol. 26 Des 2019
DEWAN REDAKSI LIMNOTEK VOL. 26 DES 2019 Limnotek, Cover
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 26, No 2 (2019)
Publisher : Research Center for Limnology

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Dewan Redaksi Limnotek Vol. 26 Des 2019
PENENTUAN BATAS TEPI DANAU PAPARAN BANJIR SECARA HITUNG PERATAAN KUADRAT TERKECIL DENGAN MULTIDATA PENGINDRAAN JAUH Julzarika, Atriyon; Dewi, Esthi Kurnia; Subehi, Luki
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 26, No 2 (2019)
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Nowadays, technology and remote sensing data have developed significantly. These developments started with conventional data to become dynamic data. Technology and remote sensing data can be used for various applications such as mapping of inland water. Inland water resources that include lakes, rivers, and swamps are one of the national priorities, especially in lake mapping. One of the problems with floodplain lakes is that it is difficult to determine the fixed boundaries of the lake surface area. This study aims to obtain a forensic geological boundary mapping of a lake using the least-square adjustment approach in a floodplain lake with multi-data remote sensing. The floodplain lake in this study was Mahakam Cascade Lake in East Kalimantan Province. The fixed boundary of the surface area of the lake was determined using the least-square adjustment approach. One method in the adjustment was the harmonic modeling algorithm. This mapping used multi-data remote sensing in the form of Synthetic Aperture Radar (SAR) and optical imagery. The imagery used was Sentinel-1 which was acquired from 2014 to 2018 and Landsat from 2014 to 2018. This algorithm showed that the fixed boundaries of Mahakam Cascade Lake can be determined with certain tolerances. These fixed boundaries ignored lake tide parameters because the maximum tide value in the lake was only +5 cm. This value was ignored because the vertical accuracy of the topographic data in the big data engine was about 2 m. The fixed delineation of lake edges can be used to determine the lake volume and surface area. The surface area of the lake obtained from the Sentinel-1 imageries was ~ 399,017 km2. Based on Landsat imageries, the surface area of the lake was ~ 399,495 km2. The difference was due to the mixing of sediments and thin turbidity at the edge of the lake. This condition caused differences in reflectance values when acquisitioning the two types of imageries. Basically, this method could be applied for determining the edge of a lake.
COVER LIMNOTEK VOL. 26 DES 2019 Limnotek, Cover
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 26, No 2 (2019)
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Cover Limnotek Vol. 26 Des 2019
NERACA AIR SITU CIKARET DAN SITU KABANTENAN DI KABUPATEN BOGOR MENGGUNAKAN PEMODELAN HIDROLOGI SWAT Nugraheni, Claudia Tyas; Pawitan, Hidayat; Purwanto, Yanuar Jarwadi; Ridwansyah, Iwan
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 26, No 2 (2019)
Publisher : Research Center for Limnology

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Bogor regency which is located in the middle of the Ciliwung basin centered in Cibinong city is experiencing rapid urban development. However, with the rapid urban development, most of these small lakes in either disappear or in degraded conditions. In this area presently still maintain 95 urban small lakes or locally known as ?situ?. Situ has multifunction such as water retention for flood mitigation, irrigation for urban agriculture, fisheries, water sport activities, and ecotourism. The objective of this study was to analyze the water balance of situ. The model was calibrated and validated on the Kampung Kelapa river gauge with manual calibration. The Soil Water Assesment Tool (SWAT) is a hydrological model designed to predict the impact of land use and management on water, sediment and agricultural chemical yields in watersheds, The model was applied to Situ Kabantenan and Cikaret for modeling of the hydrological water balance. The SWAT model simulation was done for the periods of 2008?2015 while it used land use information in 2014. The Calibration was done in 2014 and the validation in 2013, the R2 and Nash Sutcliffe Efficiency (NSE) of the calibration were 0,58 and 0,55 respectively and the validations were 0,54 and 0,49 respectively. The monthly average of volume of Situ Kabantenan and Situ Cikaret from the simulation were 136,955 m3 and 508,907 m3, respectively. The annual inflow of Situ Cikaret was 24,693,822 m3/year and outflow was 25,177,593 m3/year, precipitation was 648,520 m3/year, evaporation was 166,543 m3/year, delta storage 1,794 m3/year, respectively. The average inflow discharge of Situ Cikaret (2008?2015) were 0.78 m3/s and outflow discharge was 0.80 m3/s. The water balance results showed that both sites were in good condition since they have never passed the emergency spillway, but their function needs to be optimized as a flood controller in the Ciliwung Watershed. This study also showed that the SWAT model can be utilized as a potential monitoring tool, especially for small urban lakes as water reservoirs.
KEANEKARAGAMAN MIKROALGA DI AIR TERJUN SANDO, KOTA LUBUKLINGGAU, SUMATRA SELATAN Harmoko, Harmoko; Lokaria, Eka; Anggraini, Resti
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 26, No 2 (2019)
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There is still a little exploration of biodiversity in Lubuklinggau City, one of which is on microalgae. This study aimed to determine the biodiversity of microalgae found in Sando Waterfall. This study used survey techniques, and was carried out in June?July 2017 in Sando Waterfall, Lubuklinggau Barat I District in Lubuklinggau City. Sampling was carried out in the morning at three stations with three replications. Data were collected by observing the microalgae using a microscope and were then analyzed descriptively and qualitatively. The results showed that microalgae found in Sando Waterfall consisted of 4 divisions which are Bacillariophyta, Charophyta, Chlorophyta, dan Cyanophyta. A total of 27 genera and 30 species were found, namely Closterium sp., Cosmarium sp., Micrasterias sp., Oocystis sp., Desmidium sp., Actinastrum sp., Carteria sp., Ulothrix sp., Microspora sp., Spirogyra sp., Oedogonium sp., Euastrum sp., Xanthidium sp., Navicula sp., Asterionella sp., Eunotia sp., Cyclotella sp., Melosira sp., Guinardia sp., Surirella sp., Surirella elegans, Synedra sp., Synedra ulna, Pleurosigma directum, Fragillaria sp., Tabellaria flocculosa, Nitschia sp., Oscillatoria sp., Oscillatoria limosa, and Lyngbya sp. The most dominant division found in Sando Waterfall was Bacillariophyta which also has the highest number of species. There were five species most commonly found in Sando Waterfall, which are also members of the Bacillariophyta division, namely Navicula sp., Eunotia sp., Melosira sp., Surirella sp., and Fragillaria sp. This finding is thought to be related to the adaptability of these species to strong current of water which is the ecological condition of waterfalls. Water qualities measured in this study were the water temperature of 27°C, the pH value of 7.2, the clarity of 37 cm, and the dissolved oxygen concentration of 32 mg/L. These conditions supported the life of microalgae in Sando Waterfall.
KERAPATAN POPULASI MAKROFITA BERPENGARUH TERHADAP KELIMPAHAN DAN KEANEKARAGAMAN MIKROALGA EPIFITON DI DANAU TEMPE Nofdianto, Nofdi; Tanjung, Livia Rossila
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 26, No 2 (2019)
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Danau paparan banjir seperti Danau Tempe memiliki potensi perikanan air tawar cukup besar karena didukung oleh keunikan dalam hal produktivitasnya. Selain berfungsi sebagai komponen utama dalam produktivitas danau dan sebagai feeding ground bagi berbagai spesies ikan, tanaman air atau makrofita yang tumbuh subur di pinggir danau juga merupakan substrat bagi mikroalga epifiton yang berperan penting dalam produktivitas sekunder danau. Penelitian ini bertujuan untuk menegaskan bahwa pengendalian kerapatan tumbuh makrofita sebagai substrat mikroalga epifiton penting dilakukan dalam mendukung produktivitas perikanan berbasis ekosistem. Penelitian ini dilakukan di Danau Tempe pada bulan Maret, Mei, dan Juli 2017 terhadap kerapatan makrofita yang berbeda berdasarkan penerimaan cahaya. Sampel berupa batang makrofita dengan panjang 10 cm yang terendam dalam air diambil secara komposit sebanyak 5 batang, lalu disikat untuk mendapatkan mikroalga epifiton. Identifikasi epifiton dilakukan di Laboratorium Pusat Penelitian Limnologi LIPI. Hasilnya menunjukkan bahwa kerapatan tumbuh makrofita berpengaruh negatif terhadap kelimpahan dan keanekaragaman mikroalga epifiton di Danau Tempe. Kerapatan tumbuh berhubungan dengan penerimaan cahaya pada substrat, sehingga makrofita dengan kerapatan rendah memiliki kelimpahan epifiton lebih tinggi dibandingkan makrofita yang tumbuh rapat. Dengan demikian, pengaturan kerapatan makrofita bisa menjadi salah satu strategi dalam pengelolaan kawasan dengan menjaga keberlanjutan populasi epifiton sebagai produsen primer yang penting di perairan danau dangkal seperti Danau Tempe.Kata kunci:   makrofita, mikroalga epifiton, kerapatan tumbuh, produktivitas perikanan, Danau Tempe
SERAPAN KALSIUM DAN NUTRIEN OLEH ALGA BERFILAMEN Spirogyra sp. PADA LAMA PENYINARAN BERBEDA M, Niken T; Krisanti, Majariana; Ayu, Inna Puspa; Iswantari, Aliati; Apriadi, Tri
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 22, No 1 (2015)
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Spirogyra sp. merupakan salah satu mikroalga yang memiliki potensi sebagai bahan baku berbagai industri. Dalam rangka meningkatkan nilai guna dari potensi tersebut, dapat dilakukan penambahan elemen tertentu, di antaranya kalsium. Penelitian ini bertujuan untuk mengetahui kemampuan Spirogyra sp. dalam menyerap kalsium (Ca) dan nutrien pada lama penyinaran berbeda. Penelitian dilakukan terhadap kultur Spirogyra sp. pada skala laboratorium. Kalsium CaCl2  ditambahkan pada media Gandasil D® dengan perlak an penyinaran diskontinyu dan kontinyu. Setelah satu minggu perlakuan, konsentrasi Ca Spirogyra sp. meningkat sebesar 23,4% dan 21,8%, serta nutrien nitrogen anorganik yang terserap sebesar 67,3% dan 59,5% masing-masing pada perlakuan penyinaran kontinyu dan dikontinyu, namun bobot akhir pada perlakuan penyinaran diskontinyu lebih besar dari kontinyu. Diduga bahwa Ca merupakan elemen yang tidak dibutuhkan dalam jumlah banyak oleh Spirogyra sp. pada proses pertumbuhan alga berfilamen ini.
KETERKAITAN ANTARA KUALITAS AIR DENGAN HASIL TANGKAPAN IKAN DI MUARA SUNGAI TELUK BANTEN, PROVINSI BANTEN Sugiarti, Ade; Hariyadi, Sigid; Nasution, Syahroma Husni
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 23, No 1 (2016)
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Kondisi perairan muara sungai di Teluk Banten yang dipengaruhi oleh kondisi lingkungan, aktivitas kegiatan industri dan aktivitas manusia lainnya kemungkinan akan berpengaruh terhadap hasil tangkapan ikan di muara sungai tersebut. Tujuan dilakukannya penelitian ini adalah untuk mengkaji keterkaitan antara kualitas air dan hasil tangkapan ikan di muara - muara sungai di Teluk Banten. Pengambilan contoh air dan ikan dilakukan pada bulan Mei, Juli dan Oktober 2013 di empat stasiun, yaitu di Muara Sungai Wadas, Cibanten, Cengkok, dan Pamong. Beberapa parameter fisika dan kimia dianalisis. Pengambilan contoh ikan mengikuti operasi penangkapan ikan nelayan setempat, selanjutnya ikan dihitung jumlahnya dan diidentifikasi jenisnya. Kualitas air dianalisis dengan metode Indeks Pencemaran. Tingkat kesuburan perairan ditetapkan dengan metode TRIX. Hasil tangkapan ikan dianalisis indeks keanekaragaman, indeks dominansi dan kelimpahan relatifnya. Keterkaitan antara kualitas air dengan hasil tangkapan ikan di perairan muara sungai Teluk Banten dilakukan menggunakan analisis CCA (Canoconical Correspondence Analysis) lalu dibuat matriksnya untuk setiap waktu pengamatan. Kualitas air di empat muara sungai tergolong tercemar ringan. Tingkat kesuburan perairan di keempat muara tersebut berkisar dari eutrofik sampai hipertrofik. Berdasarkan analisis CCA, parameter arus, suhu air, salinitas, dan amonia berkorelasi dengan keberadaan ikan-ikan di Muara Sungai Wadas, Cibanten dan Cengkok, sedangkan keberadaan ikan belanak (Mugil cephalus) di Muara Sungai Pamong lebih berkorelasi dengan kondisi parameter daya hantar listrik, TSS, dan pH. Berdasarkan matriks hubungan antara kualitas air, tingkat kesuburan perairan, dan hasil tangkapan ikan, dapat disimpulkan bahwa kualitas air yang tercemar ringan dengan tingkat kesuburan yang tinggi, membuat hasil tangkapan di muara - muara sungai Wadas, Cibanten, Cengkok dan Pamong di Teluk Banten tergolong masih cukup tinggi.

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