PERHITUNGAN DEBIT SIMULASI DENGAN DEBIT TERUKUR PADA DAS MANIKIN

  • Rosany A. Nomleni Program Studi Teknik Sipil, FST Undana
  • Judi K. Nasjono Program Studi Teknik Sipil, FST Undana
  • Rosmiyati A. Bella Program Studi Teknik Sipil, FST Undana
Keywords: Debit, simulasi, terukur, Discharge, Simulation, Measured

Abstract

Debit air yang mengalir di sungai sangat bergantung pada beberapa faktor antara lain bentuk sungai dan besarnya curah hujan yang turun. Semakin besar curah hujan yang turun maka semakin besar pula debit air di sungai oleh karena itu perlu dilakukan analisis debit maksimum di Daerah Aliran Sungai Manikin. Tujuan dari penelitian ini adalah untuk mendapatkan nilai debit simulasi berdasarkan curah hujan metode Aritmtik, Thiessen dan Isohiet dan debit terukur berdasarkan data tinggi muka air. Debit Simulasi dan terukur diuji menggunakan metode Mean Square Error dan Nash Sutcliffe Efficiency. Dari hasil penelitian diperoleh jumlah nilai hujan maksimum metode Aritmatik tahun 2009-2017 sebesar 681,000 mm, metode Thiessen sebesar 664,080 mm, dan metode Isohiet sebesar 982,111 mm. Nilai debit terukur yang terbesar terjadi pada tahun 2015 sebesar 46,370 m3/dtk. Nilai debit simulasi terbesar menurut metode Aritmatik yaitu pada tahun 2014 sebesar 90,779 m3/dtk, metode Thiessen tahun 2011 sebesar 102,202 m3/dtk, dan metode Isohiet tahun 2015 sebesar 148,940 m3/dtk. Nilai MSE untuk metode Aritmatik sebesar 4439,522 dan nilai NSE sebesar -18,368, nilai MSE untuk metode Thiessen sebesar 4218,128 dan nilai NSE sebesar -17,403, nilai MSE untuk metode Isohiet sebesar 9319,230 dan nilai NSE sebesar -39,657.

The discharge water flows in the river depends on several factors, including the shape of the river and the amount of rainfall that falls. The greater the rainfall that falls, the greater the water discharge in the river, therefore the maximum discharge analysis needs to be done in the Manikin Watershed. The purpose of this study is to obtain a simulated discharge value using the Rational method based on rainfall, arrhythmic, thiessen and isohiet methods and measured discharge based on water level data. Simulation and measured discharge were tested using the Mean Square Error and Nash Sutcliffe Efficiency methods. From the results of the study, the maximum rain value of the Arithmetic method in 2009-2017 is 681,000 mm, the Thiessen method is 664,080 mm, and the Isohiet method is 982,111 mm. The largest measured discharge value  occurred in 2015 at 46,370 m3/sec. The simulation discharge value is the largest according to the Arithmetic method, namely in 2014 amounted to 90.779 m3/sec, the Thiessen method in 2011 is 102.202 m3/sec, and the Isohiet method in 2013 is 148.940 m3/sec. The MSE value for the Arithmetic method is 4439,522 and the NSE value is -18,368, the MSE value for the Thiessen method is 4218,128 and the NSE value is -17,403, the MSE value for the Isohiet method is 9319,230 and the NSE value is -39,657.

Metrics

Metrics Loading ...
Published
2019-11-10
How to Cite
Nomleni, R. A., Nasjono, J. K., & Bella, R. A. (2019). PERHITUNGAN DEBIT SIMULASI DENGAN DEBIT TERUKUR PADA DAS MANIKIN. Jurnal Teknik Sipil, 8(2), 141-152. https://doi.org/10.35508/jts.8.2.141-152

Most read articles by the same author(s)

Obs.: This plugin requires at least one statistics/report plugin to be enabled. If your statistics plugins provide more than one metric then please also select a main metric on the admin's site settings page and/or on the journal manager's settings pages.