PREDIKSI TINGKAT KEKERUHAN (TURBIDITAS) MENGGUNAKAN CITRA SATELIT SENTINEL-2A DI WADUK JATILUHUR, JAWA BARAT

Penulis

  • Arip Rahman Balai Riset Pemulihan Sumberdaya Ikan, Kementerian Kelautan dan Perikanan
  • Lismining Pujiyani Astuti Balai Riset Pemulihan Sumberdaya Ikan, Kementerian Kelautan dan Perikanan
  • Andri Warsa Balai Riset Pemulihan Sumberdaya Ikan, Kementerian Kelautan dan Perikanan
  • Agus Arifin Sentosa Balai Riset Pemulihan Sumberdaya Ikan, Kementerian Kelautan dan Perikanan

DOI:

https://doi.org/10.32679/jsda.v17i2.697

Abstrak

Turbidity is one of the remote sensing indicators on the  reservoir physical characteristics that can reduce its brightness level. Measuring reservoir physical characteristics traditionally are expensive and time consuming as well. Therefore, remote sensing is used as an alternative for turbidity measurement because it can provide data and products spatially, temporally as well as synoptically with low cost. This study aims to obtain an algorithm using a combination of in-situ turbidity data measurement and Sentinel-2A satellite imagery data. The resulting algorithm can be used to predict and map turbidity in Jatiluhur Reservoir. Based on the multiregression between B3 (green band) and B4 (red band) with in-situ turbidity data measurement, it is obtainted that the regression coefficients are a = 76.77, b = 63.22 and c = -34.31 respectively, with the equation of Y = 76, 77+63.22 X1-34.31X2 (Y=predicted turbidity, X1=lnB3, X2=lnB4). The correlation value between in situ and turbidity prediction is quite strong with a coefficient of determination (R2) of 0.60, and Root Mean Square Error (RMSE) of 1.95 NTU. Based on Mean Absolute Percentage Error (MAPE) analysis, the deviation is 31.1%. High levels of turbidity can reduce the main productivity of water and its organisms, especially in respiratory and visual problems. Sedimentation caused by high turbidity levels can make siltation which results in reservoir capacity loss.

Keywords: Turbidity, remote sensing, Sentinel-2A satellite imagery data, Jatiluhur Reservoir, siltation

Unduhan

File Tambahan

Diterbitkan

2021-11-30

Cara Mengutip

Rahman, A., Astuti, L. P., Warsa, A., & Sentosa, A. A. (2021). PREDIKSI TINGKAT KEKERUHAN (TURBIDITAS) MENGGUNAKAN CITRA SATELIT SENTINEL-2A DI WADUK JATILUHUR, JAWA BARAT. JURNAL SUMBER DAYA AIR, 17(2), 59–68. https://doi.org/10.32679/jsda.v17i2.697

Terbitan

Vol 17 No 2 (2021)

Bagian

ARTIKEL

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