Rainfall-Discharge Simulation in Bah Bolon Catchment Area by Mock Method, NRECA Method, and GR2M Method

Hadiani Rintis; Suyanto Suyanto; Yosephina Puspa Setyoasri

doi:10.4028/www.scientific.net/AMM.845.24

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 845Rainfall-Discharge Simulation in Bah Bolon...

Rainfall-Discharge Simulation in Bah Bolon Catchment Area by Mock Method, NRECA Method, and GR2M Method

Abstract:

Rainfall-discharge simulation is a process transformation from rainfall to discharge in a catchment area by modelling. The most popular models are Mock method and NRECA method. It is according to the handbook of irrigation that is written by government (Indonesia). GR2M (Global Rainfall-Runoff Model) is a new model that is not usual to be used in Indonesia. GR2M is a simulation model that needs less parameter than Mock and NRECA methods. This research was conducted in the Bah Bolon catchment area, Simalungun, North Sumatra. It will analyze the simulation of rainfall-discharge by three methods, Mock, NRECA, and GR2M without considering whether the watershed was wet or dry watershed. The analysis was computed the dependable discharge by flow duration curve (fdc) in a series data on each method. The parameter that compared was the dependable discharge, i.e. the discharge with probability 70% (Q70), probability 80% (Q80), and probability 90% (Q90). GR2M will compared with Mock, then compared with NRECA. The results show that the discharge simulation by GR2M methods and the discharge simulation by Mock method has correlation 0.968. The discharge simulation by GR2M method and the discharge simulation by NRECA method has correlation 0,955. It means that GR2M close to the both of them, but GR2M can used easily because it has less parameter than the other. Based on the graphic, GR2M close to the Mock method for probability more than 50%. So, if the probability is 70%, 80%, and 90%, then GR2M method close to Mock method.

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Periodical:

Applied Mechanics and Materials (Volume 845)

Pages:

24-29

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.845.24

Citation:

Cite this paper

Online since:

July 2016

Authors:

Hadiani Rintis, Suyanto Suyanto, Yosephina Puspa Setyoasri*

Keywords:

Bah-Bolon, GR2M, Mock, NRECA, Rainfall-Discharge Simulation

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* - Corresponding Author

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