PEMANFAATAN CITRA PENGINDERAAN JAUH UNTUK PEMETAAN KUALITAS AIR DI WADUK JATILUHUR, KABUPATEN PURWAKARTA, PROVINSI JAWA BARAT

ARIODAMAR RAMADIANTO, Prof. Dr. Totok Gunawan, M.Si.

2014 | Skripsi | KARTOGRAFI DAN PENGINDRAAN JAUH

Penginderaan jauh mampu merekam perubahan pantulan berbagai obyek termasuk tubuh air yang disebabkan material yang terkandung dalam tubuh air atau perubahan pancaran menggunakan sensor thermal-nya, sehingga dapat dimanfaatkan untuk mengkaji parameter fisik kualitas air yang memiliki karakterisitk visual seperti suhu permukaan air, kekeruhan air, dan zat padat terlarut. Tujuan utama penelitian ini ialah untuk memetakan kondisi parameter – parameter fisik tersebut secara kuantitatif pada seluruh bagian Waduk Jatiluhur Metode yang dilakukan adalah analisis statistik korelasi dan regresi nonlinear antara hasil pengukuran in situ parameter fisik dengan nilai spektral citra Landsat 8 pada saluran tunggal, nisbah saluran, atau kombinasi antar saluran, yang menghasilkan model regresi terbaik masing – masing parameter fisik untuk digunakan dalam pemetaan kualitas air. Terdapat korelasi yang kuat antara hasil pengukuran in situ dengan nilai spektral Landsat 8 (0,86

Remote sensing is able to record changes in the reflection of a variety of objects, including water body which caused by the material contained in the water body, or the radiation changes through its thermal sensor, so it can be used to study the physical parameters of water quality that has a visual characteristic such as water surface temperature, turbidity, and dissolved solids. The primary objective of this study was to map condition of that physical parameters quantitatively in all parts of Jatiluhur Reservoir, The method used is statistical correlation and nonlinear regression analysis between in situ measurements of the physical parameters with Landsat 8 imagery spectral values on a single band, band ratio, or band combination that produces the best regression model respectively for each physical parameters for use in water quality mapping There is a strong correlation between the results of in situ measurements with spectral values of Landsat 8 (0,86 < R < 0,96). Band 11 and band ratio B10/B11 correlates strongly with the water surface temperature, (R = 0,86771 and R2 = 0,752921). Band ratio B3/B2 and B4/B2 correlated most strongly with water turbidity, (R = 0,961037 and R2 = 0,9236 ). Band 5 and band ratio B5/B4 has the strongest relationship with dissolved solids, (R = 0,925307 and R2 = 0,8562 ). Best regression models obtained through full cubic multivariate analysis, with that bands as an independent variable. The results of the mapping is able to well described the distribution and spatial patterns of physical parameters of water quality in Jatiluhur Reservoir. Key words : Remote Sensing, Landsat 8 Water Quality, Regression Analysis

Kata Kunci : Penginderaan Jauh, Landsat 8, Kualitas Air, Analisis Regresi