PEMANTAUAN TOTAL SUSPENDED  SOLID (TSS) WADUK GAJAH MUNGKUR PERIODE 2013-2017 DENGAN CITRA SATELIT LANDSAT-8

Abdi Sukmono

doi:10.14710/elipsoida.2018.2812

DOI: https://doi.org/10.14710/elipsoida.2018.2812

PEMANTAUAN TOTAL SUSPENDED SOLID (TSS) WADUK GAJAH MUNGKUR PERIODE 2013-2017 DENGAN CITRA SATELIT LANDSAT-8

Abdi Sukmono

Departemen Teknik Geodesi-Fakultas Teknik Universitas Diponegoro, Indonesia

Received: 23 Jun 2018; Published: 23 Jul 2018.

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Abstract

Sedimentasi merupakan masalah utama bagi waduk di Indonesia. Salah satu waduk yang mengalami masalah serius terhadap sedimentasi adalah waduk Gajah Mungkur. Sedimentasi tinggi pada waduk Gajah Mungkur mengakibatkan pendangkalan yang menyebabkan waduk tidak dapat berfungsi secara optimal. Besarnya tingkat sedimentasi ini dapat dilihat dari nilai Total Suspended Solid (TSS). Pemantauan perkembangan TSS sangat dibutuhkan dalam penanganan sedimentasi waduk. Data ini dapat digunakan sebagai acuan dalam penentuan strategi dan area prioritas penanganan pendangkalan waduk. Perkembangan teknologi penginderaan jauh memungkinkan TSS dihitung menggunakan data citra satelit. Salah satunya citra satelit Landsat-8. Dalam penelitian ini digunakan citra satelit Landsat-8 untuk pemantauan TSS di waduk Gajah Mungkur periode 2013-2017. Algoritma TSS yang digunakan adalah algoritma Syarief Budiman. Untuk memastikan akurasi dari pengolahan TSS dari citra dilakukan uji akurasi menggunakan pengukuran TSS in situ sebanyak 26 titik sampel. Hasil dari penelitian ini menunjukkan nilai TSS kelas tinggi (50-100 mg/L) dan kelas sangat tinggi (>100 mg/L) mengalami kenaikan yang signifikan dari tahun 2013 ke tahun 2017. Kenaikan TSS terjadi terutama pada muara Sub Das Keduang dan Sub Das Wiroko. Hasil uji akurasi menunjukkan nilai koefisien determinasi sebesar 0, 92 dimana hasil ini menunjukkan bahwa metode algoritma citra ini cukup akurat untuk pemantauan TSS.

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In Vol 1, No 01 (2018): Volume 01 Issue 01 Year 2018

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