PERLAWANAN ALIRAN DI KAPUAS KECIL
DOI:
https://doi.org/10.29103/tj.v10i1.270Abstract
Kekasaran dasar saluran sangat berpengaruh pada karakteristik aliran. Kesalahan dalam menentukan besarnya nilai kekasaran dasar saluran, terutama material dasar non kohesif, dapat menimbulkan kesalahan dalam menghitung kecepatan dan debit aliran. Kekasaran dasar saluran dinyatakan dalam koefisien kekasaran. Koefisien kekasaran saluran yang sering digunakan dalam aliran seragam adalah nilai koefisien kekasaran Manning (n). Banyak penelitian yang dilakukan untuk mendapatkan nilai koefisien kekasaran Manning, diantaranya didasarkan n tabel. Nilai n tabel Manning hanya disarankan untuk saluran kondisi baik. Kondisi aliran saluran alami penerapan n tabel Manning sering memberikan hasil sangat kasar, karena keadaan aliran lebih banyak tergantung faktor. Salah satunya faktornya, adanya bentuk konfigurasi dasar atau dasar tidak rata. Oleh karena itu, kajian mendalam mengenai perhitungan nilai koefisien kekasaran Manning dengan bentuk konfigurasi dasar menjadi sangat penting. Tujuan penelitin, untuk mendapatkan rumusan empiris nilai koefisien kekasaran Manning saluran alam. Modifikasi koefisien kekasaran Manning, yang berkaitan butiran dasar dan bentuk dasar. Metode yang akan dilaksanakan berupa pembuatan rumusan empiris hubungan bentuk konfigurasi dasar saluran terhadap koefisien kekasaran dasar material non kohesif. Aplikasi penerapan rumusan akan dilakukan pada studi kasus Sungai Kapuas di kota PontianakReferences
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