Overcoming Flood in Batang-Takung Downstream Using Numerical Simulations

Mas Mera, Fakri Rantoso

Abstract


Batang-Takung River empties into Batang-Pangian River in Sijunjung Regency, West Sumatra Province. The downstream of Batang Takung is frequently flooding in the rainy seasons. The water-surface level at the intersection between Batang Takung and Batang Pangian is higher than that in the Batang-Takung downstream. This situation is then getting worse since the river bed of the Takung downstream is relatively flat. As a result, backwater phenomenon occurs along the Takung downstream and then it floods up to the surrounding residential and plantation areas. The present study is devoted to overcome the flood in the Batang-Takung downstream by numerical simulations using the existing software of HEC-RAS 4.10. In the present study, the software is applied to predicting the flow depths in both the uniform and varied flows and in the one-dimensional, steady-state condition for all simulation scenarios. In the first scenario, Batang Takung, Batang-Pangian Hulu (Batang-Pangian part from the intersection upward) and Batang-Pangian Hilir (Batang-Pangian part from the intersection downward) are in the existing condition. Similar to the first scenario but Batang-Pangian Hulu is put aside in the second scenario. The third scenario is the same as the first one but Batang Takung is put aside. The fourth scenario is the same as the first one but the upstream of Batang-Pangian Hilir around 1013 m long is straightened. In the fifth scenario, an additional intersection of Batang-Pangian Hulu and Batang-Pangian Hilir is made about 1762 m downward of the existing intersection. This is done by making a new trace in the downstream of Batang-Pangian Hulu. The simulation results show that straightening the river trace or normalizing the river is not effective in overcoming the flood in the Batang-Takung downstream. However, by making an additional intersection between the Batang-Pangian Hulu and the Batang-Pangian Hilir located about 1762 m downward, the flood in the Batang-Takung downstream could be solved.

Keywords


flood; backwater; river intersection; meander; simulation.

Full Text:

PDF

References


H. Cai, H. H. G. Savenije, C. Jiang, and Q. Yang, “Analytical approach for determining the mean water level profile in an estuary with substantial fresh water discharge”, Hydrology and Earth System Sciences, 20, p1177-1195, 2016.

B. Hu, Z. Yang, H. Wang, X. Sun, N. Bi, and G. Li, “Sedimentation in the Three Gorges Dam and the future trend of Changjiang (Yangtze River) sediment flux to the sea”, Hydrology and Earth System Sciences, 13, p2253-2264, 2009.

L. L. Wang, Z. Z. Yu, H. C. Dai, and Q. H. Cai, “Eutrophication model for river-type reservoir tributaries and its applications”, Water Sciences and Engineering, 2(1), p16-24, 2009.

A. C. Costa, A. Bronstert, and J. C. de Aroujo, “A channel transmission losses model for different dryland rivers”, Hydrology and Earth System Sciences, 16, p1111-1135, 2012.

L. Tang, W. Zhang, M. X. Xie, and Z. Yu, “Application of equivalent resistance to simplification of Sutong Bridge piers in tidal river section modeling”, Water Sciences and Engineering, 5(3), p316-328, 2012.

Y. Fan, “Application of 2-D sedimen model to fluctuating backwater area of Yangtz River”, Water Sciences and Engineering, 2(3), p37-47, 2009.

K. Lee, A. R. Firoozfar, and M. Muste, “Technical Note: Monitoring of unsteady open channel flows using the continuous slope-area method”, Hydrology and Earth System Sciences, 21, p1863-1874, 2017.

PSDA, Laporan Survey Investigasi Desain Batang Pangian Kabupaten Sijunjung, Dinas Pengelolaan Sumber Daya Air Provinsi Sumatera Barat, Padang, 2013.

M. Mera, Hidrolika Saluran-terbuka, CV. Ferila Padang, 210p, ISBN: 978-602-9081-03-9, 2010.

M. Mera, R. Hardianti, M. Riondy, and R.D.B. Putra, “Effects of Cross-Sectional Geometry of Prismatic Reaches on the Manning Coefficients”, International Journal of Civil Engineering & Technology (IJCIET), 8(10), p677-686, 2017.

J. S. Kim, C. J. Lee, and Y. J. Kim, “Roughness coefficient and its uncertainty in gravel bed river”, Water Sciences and Engineering, 3(2), p217-232, 2010.

K. v. d. Wiel, S. B. Kapnick, G. j. v. Oldenborgh, K. Whan, S. Philip, G. A. Vecchi, R. K. Singh, J. Arrighi, and H. Cullen, “Rapid attribution of the August 2016 flood-inducing extreme precipitation in south Louisiana to climate change”, Hydrology and Earth System Sciences, 21, p897-921, 2017

K. Lee, A. R. Firoozfar, and M. Muste, “Technical Note: Monitoring of unsteady open chanel flows using the continuous slope-area method”, Hydrology and Earth System Sciences, 21, p1863-1874, 2017

M-J. Um, Y. Kim, D. Park, and J. Kim, “Effects of different reference periods on drought index (SPEI) estimations from 1901 to 2014”, Hydrology and Earth System Sciences, 21, p4989-5007, 2017

W. Liu, F. Sun, Y. Li, G. Zhang, Y-F. Sang, W. H. Lim, J. Liu, H. Wang, and P. Bai, “Investigating water budget dynamics in 18 river basins across the Tibetan Plateau through multiple dataset”, Hydrology and Earth System Sciences, 22, p351-371, 2018

M. Hartnett, and S. Nash, “High-resolution flood modelling of urban areas using MSN-Flood”, Water Sciences and Engineering, 10(3), p175-183, 2017.

H. Hidayat, B. Vermeulen, M. G. Sassi, P. J. J. F Torfs, and A.J.F. Hoiting, “Discharge estimation in a backwater affected meandering river”, Hydrology and Earth System Sciences, 15, p2717-2728, 2011.




DOI: http://dx.doi.org/10.18517/ijaseit.9.4.8934

Refbacks

  • There are currently no refbacks.



Published by INSIGHT - Indonesian Society for Knowledge and Human Development