Perancangan dan Implementasi Prototipe Sensor Termal Geomarine CTD 1.0 berbasis Arduino untuk Observasi In-situ Lake Surface Water Temperature (LSWT)
DOI:
https://doi.org/10.12962/geoid.v19i2.1218Keywords:
Prototipe, CTD, Arduino, Lake Surface Water TemperatureAbstract
Parameter suhu permukaan air danau atau Lake Water Surface Temperature (LSWT) merupakan salah satu indikator penting dalam pemantauan lingkungan perairan seperti sebagai parameter perubahan iklim dan kerusakan lingkungan akibat aktivitas manusia. Berbagai metode dalam penentuan LSWT telah diterapkan namun yang paling representatif adalah pengambilan secara in-situ menggunakan instrumen salah satunya Conductivity, Temperature, Depth (CTD). Faktor ketidakjangkauan harga dari alat tersebut secara komersil menjadi pertimbangan utama dalam penelitian ini. Prototipe yang dihasilkan terdiri atas sensor konduktivitas listrik (prinsip anoda-katoda) dan sensor temperatur dengan basis microcontroller Arduino Mega. Dengan mempertimbangkan studi kasus LSWT, maka penelitian ini dibatasi pada penggunaan sensor temperatur. Proses uji korelasi dan validasi juga telah dilakukan dengan mengacu pada instrumen CTD komersil yang telah diketaui tingkat akurasinya. Pengambilan data lapangan tersebut dilaksanakan di Waduk Selorejo, Kabupaten Malang. Nilai temperatur antara prototipe dan CTD komersil memiliki rata-rata selisih absolut sebesar 0,12°C. Hasil uji korelasi menunjukkan bahwa tingkat hubungan bacaan protipe dengan data validasi berkorelasi kuat (95,9%). Selain itu pada uji validasi menggunakan nilai Root Mean Square Error (RMSE) menunjukkan bahwa hasil bacaan sensor temperatur pada prototipe memiliki penyimpangan sebesar 0,308°C sehingga dapat dikategorikan rendah. Oleh karena itu, prototipe ini dapat digunakan untuk aplikasi in-situ LSWT. Namun demikian, pengembangan produk dari prototipe ini tetap dibutuhkan untuk memaksimalkan potensi dan mengurangi ketergantungan terhadap instrumen lainnya.
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