Pengaruh Teknik Asimilasi Penakar Hujan Brandes Spatial Adjustment terhadap Quantitative Precipitation Estimation (QPE) Radar BMKG Padang

Authors

  • Agung Hari Saputra Sekolah Tinggi Meteorologi Klimatologi dan Geofisika
  • Nur Riska Lukita Badan Meteorologi Klimatologi dan Geofisika, Stasiun Meteorologi Kelas I Sultan Hasanudin, Makassar
  • Sirly Oktarina Badan Meteorologi Klimatologi dan Geofisika, Stasiun Meteorologi Kelas II Tangerang Selatan, Banten

DOI:

https://doi.org/10.25077/jfu.11.3.373-379.2022

Keywords:

Curah hujan, QPE, Radar, Asimilasi, BRA

Abstract

Estimasi curah hujan kuantitatif (QPE) dengan tingkat akurasi spasial yang baik dan temporal yang tinggi dapat diperoleh dari instrumen radar cuaca. Namun, terdapat limitasi dalam pengamatan radar cuaca karena efek blocking dan adanya ground clutter. Sehingga pada penelitian ini akan dilakukan perbaikan kualitas data radar dengan mereduksi ground clutter menggunakan clutter map. Setelah perbaikan kualitas data radar akan dilakukan asimilasi data radar dengan data penakar hujan guna mengurangi kesalahan dan meningkatkan akurasi estimasi curah hujan. Data penakar hujan memiliki akurasi yang tinggi namun, informasi yang dikumpulkan masih berupa titik yang tidak terdistribusi secara merata sehingga tingkat keterwakilan spasialnya masih terbatas. Asimilasi curah hujan dengan data penakar hujan dapat dilakukan dengan metode Brandes Spatial Adjusment (BRA). Metode BRA memerhatikan jarak antara grid point dengan penakar hujan. Berdasarkan hasil penelitian diperoleh bahwa metode tersebut dapat mengurangi kesalahan estimasi namun tidak secara signifikan mengurangi kesalahan estimasi curah hujan.

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Published

2022-07-01

How to Cite

Saputra, A. H., Lukita, N. R., & Oktarina, S. (2022). Pengaruh Teknik Asimilasi Penakar Hujan Brandes Spatial Adjustment terhadap Quantitative Precipitation Estimation (QPE) Radar BMKG Padang. Jurnal Fisika Unand, 11(3), 373–379. https://doi.org/10.25077/jfu.11.3.373-379.2022

Issue

Vol. 11 No. 3 (2022)

Section

Articles

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