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Analisis Spasial dan Temoral Kesuburan Perairan [Paper]

ABSTRACT Southern Aru waters is a potential fishing areas with abundant fish resources. Fishing boats catch fish by considering the condi...


ABSTRACT
Southern Aru waters is a potential fishing areas with abundant fish resources. Fishing boats catch
fish by considering the condition of the waters productivity such as upwelling phenomenon through
the parameters of sea surface temperatures and an abundance of chlorophyll-a concentration. The
use of MODIS imagery can periodically describe the timing and location of upwelling. Variability of
sea surface temperature and chlorophyll-a concentration in latitude 7 LS and 7.5 LS, longitude
133.1  -  136 BT showed the phenomenon of upwelling in the east season where sea surface
temperature decreased from 30° C to 24°C while the chlorophyll-a concentration increased by an
average of 0,3 mg/m3 to 3.61 mg/m3.  Downwelling phenomenon took place in the west  season
where the sea surface temperature in the same latitude range 30° C to be warm with an average
concentration of chlorophyll-a <1 mg/m3. The number of fishing vessels operating in the fishing area known using RADARSAT-2 imagery and data VMS were later adapted to capture images of each
month at the same location. Based on the spatial and temporal analysis was conducted to determine the distribution of fishing  vessels in the eastern summer time high waters  productivity where the concentration of chlorophyll-a at the point  reached 5:01 mg  m3,  the number of fishing vessels in operation increased to 150 units/ ay. While in the West season low waters  productivity where the concentration of chlorophyll-a at the point of  <1 mg/m3 and the number of ships in operation decreased to below 40 units/day. This suggests that the increase in the number of fishing fleets affected by the level of waters productivity or fishing season in the East to Transition II at the
southern Aru Islands waters.

Keywords: Chlorophyll-a, Modis, the south of Aru, RADARSAT-2, Sea surface temperature.

ABSTRAK
Perairan selatan  Aru merupakan daerah penangkapan    ikan yang  potensial dengan sumberdaya
ikannya yang berlimpah. Kapal-kapal ikan  melakukan penangkapan ikan dengan mempertimbangkan kondisi kesuburan perairan yaitu fenomena upwelling melalui parameter suhu permukaan laut dan kelimpahan konsentrasi klorofil-a.  Penggunaan citra MODIS secara periodik dapat  menggambarkan waktu dan lokasi  upwelling. Variabilitas suhu permukaan laut dan konsentrasi klorofil-a di lintang 7 LS dan 7.5 LS, bujur 133.1  –  136 BT menunjukkan fenomena upwelling pada musim Timur dimana suhu permukaan laut menurun  dari 30°C  hingga 24 °C sedangkan konsentrasi klorofil-a rata-rata meningkat  dari 0,3mg/m3 hingga 3.61 mg/m3.  Sebaliknyafenomena downwelling terjadi di musim Barat dimana suhu permukaan laut di lintang yang sama menjadi hangat berkisar 30°C dengan konsentrasi rata-rata klorofil-a <1 mg/m3. Jumlah kapal ikan yang beroperasi di daerah penangkapan  diketahui dengan menggunakan citra Radarsat-2 dan data VMS yang disesuaikan dengan waktu pengambilan citra di setiap bulannya dengan lokasi yang sama.  Berdasarkan analisis spasial dan temporal dimana konsentrasi klorofil-a di titik penangkapan mencapai 5.01 mg/m3 terjadi peningkatan jumlah kapal ikan yang beroperasi hingga 150 unit/hari. Sedangkan pada musim Barat kesuburan perairan rendah dimana konsentrasi klorofil-a di titik Jurnal Kelautan, 9(2), 155-163, Oktober 2016 156 penangkapan <1 mg/m3 dan jumlah kapal yang beroperasi mengalami penurunan hingga dibawah 40 unit/hari. Hal ini menunjukkan bahwa meningkatnya jumlah armada kapal ikan dipengaruhi oleh tingkat kesuburan perairan atau musim tangkap pada musim Timur hingga musim Peralihan II di perairan selatan Kepulauan Aru.
Kata Kunci: Klorofil-a, Modis, perairan selatan Aru, Radarsat-2, suhu permukaan laut.








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RSGIS INDONESIA: Analisis Spasial dan Temoral Kesuburan Perairan [Paper]
Analisis Spasial dan Temoral Kesuburan Perairan [Paper]
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