Cost Comparison of Drainage Channel Construction Considering Uncertainty of Rainfall Distribution

https://doi.org/10.22146/jcef.39121

Intan Supraba(1*), Istiarto Istiarto(2), Radianta Triatmadja(3)

(1) Department of Civil and Environmental Engineering, Universitas Gadjah Mada, Yogyakarta, INDONESIA
(2) Department of Civil and Environmental Engineering, Universitas Gadjah Mada, Yogyakarta, INDONESIA
(3) 
(*) Corresponding Author

Abstract


Rainfall data is the main parameter to design drainage channel. The accuracy of rainfall data determines the accuracy of peak discharge estimation that is used for designing the drainage channel for flood mitigation purpose. The previous study presented that uncertainty of peak discharge is associated with the uncertainty of rainfall distribution and uncertainty of water holding capacity. The main purpose of this study is for understanding the sensitivity of rainfall data by comparing the estimated cost to construct drainage channel based on different values of peak discharges using two different rainfall data set which one rainfall data is created by considering 10% uncertainty of rainfall distribution. This study area is located on Plampang, Sumbawa Besar, West Nusa Tenggara. Results showed that the total cost to construct drainage channel increased by 15% if considering 10% uncertainty of rainfall.


Keywords


Uncertainty of rainfall distribution; cost estimation; drainage channel

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References

Burcea, S. et al., 2012. Comparison Between Radar Estimated and Rain Gauge Measured Precipitation in The Modalvian Plateau. Environmental Engineering and Management Journal, pp. 723-731.

Cheval, S. et al., 2011. Climatologic Adjustments to Monthly Precipitation in Romania. International Journal of Climatology, pp. 704-714.

Lembaga Kerjasama Fakultas Teknik UGM, 2016. Studi Penyelidikan Lapangan PLTU Sumbawa 2 [Field Observation Study of PLTU Sumbawa 2] (2x50 MW), Yogyakarta.

Supraba, I., 2015. Uncertainty of Runoff Associate with Uncertainties of Water Holding Capacity and Rainfall Distribution in Mountainous Catchments. Hokkaido University.

Supraba, I. & Yamada, T. J., 2015. Uncertainty of Peak Runoff Height Associated with Uncertainty of Water Holding Capacity and Rainfall Pattern. Journal of Japan Society of Civil Engineers, pp. I_17-I_22.

 



DOI: https://doi.org/10.22146/jcef.39121

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