Estimasi Evapotranspirasi Potensial Menggunakan Algoritma Random Forest di Daerah Irigasi Tungkub, Bali

Penulis

  • Luh Made Putri Apriliani Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia
  • Ni Nyoman Sulastri Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia
  • I Wayan Widia Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia
  • I Putu Gede Budisanjaya Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

DOI:

https://doi.org/10.24843/j.beta.2025.v13.i01.p16

Kata Kunci:

machine learning, potential evapotranspiration, random forest, weather variabel

Abstrak

Besaran nilai Evapotranspirasi Potensial (ETp) sangat diperlukan untuk perencanaan distribusi air dan pola
tanam. Umumnya, perhitungan ETp diperoleh dari perhitungan model empiris, seperti model Penman
Monteith (PM) yang direkomendasikan oleh Food and Agriculture Organization (FAO). Namun, penerapan
model ini memerlukan variabel cuaca yang banyak dan ketersediaan data cuaca yang tidak memadai. Tujuan
penelitian ini adalah menghasilkan model estimasi ETp dengan algoritma Random Forest (RF). Variabel
cuaca yang digunakan pada penelitian ini yang dijadikan input dalam pemodelan ETp yaitu (1) radiasi
matahari (Rs); (2) suhu udara (T); (3) kelembaban udara (RH); (4) dan kombinasi Rs dan T. Data variabel
cuaca diperoleh dari automatic weather station (AWS) di Daerah Irigasi (DI) Tungkub, Bali. Hasil
penelitian menunjukkan masukan variabel cuaca Rs merupakan model estimasi terbaik, sedangkan masukan
variabel cuaca RH merupakan model estimasi terlemah. Pada kalibrasi model terdapat tiga metrik evaluasi
untuk mengevaluasi kinerja model yaitu R2, MSE, dan RMSE. Sementara pada validasi model
menggunakan tiga teknik yaitu prediction error plot, residuals plot, dan k-fold CV. Hasil penelitian
menunjukkan estimasi nilai ETp rata-rata dengan skenario masukan Rs menggunakan algoritma RF di DI
Tungkub 0,14 mm/jam (R2 = 1,00, MSE = 0,00, RMSE = 0,01). Sementara itu, nilai rata-rata ETp PM yaitu
0,15 mm/jam. Skenario masukan Rs menggunakan algoritma RF menunjukan estimasi nilai yang mendekati
nilai ETp PM.

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Diterbitkan

2025-04-30

Cara Mengutip

Apriliani, L. M. P., Sulastri, N. N., Widia, I. W., & Budisanjaya, I. P. G. (2025). Estimasi Evapotranspirasi Potensial Menggunakan Algoritma Random Forest di Daerah Irigasi Tungkub, Bali. Jurnal BETA (Biosistem Dan Teknik Pertanian), 13(1), 142–150. https://doi.org/10.24843/j.beta.2025.v13.i01.p16

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