Analysis on the sediment sluicing efficiency by variation of operation water surface elevation at flood season

Anchul Jeong; Seongwon Kim; Minseok Kim; Kwansue Jung

doi:10.3741/JKWRA.2016.49.12.971

All Issue

2016 Vol.49, Issue 12 Preview Page Next Page

Analysis on the sediment sluicing efficiency by variation of operation water surface elevation at flood season 홍수기 운영수위 변화에 따른 배사 효율 분석

31 December 2016. pp. 971-980

PDF XML

Abstract

In general, efficient operation of sediment sluicing is important in economical aspect. In this study, the efficiency of sediment sluicing by various operation at water surface elevation on multi-functional weirs were analyzed using Nays2DH, and we focused on the Dalsung weir at Nakdong river. The results of this study shows that, the same number of flushing channels and water gates were developed due to sediment sluicing, and sediment deposition occurred in upstream region of flushing channels. Also, the sediment sluicing efficiency increased by approximately 4.6% and sedimentation decreased by approximately 4.5% at EL. 14.5 m for operations on water surface elevation exceeding EL. 14.0 m. The mitigation of reservoir sedimentation and extension of maintenance dredging period are possible if the variation of sediment sluicing efficiency in various operation at water surface elevation during flood season are considered.

Keywords

Sediment Sluicing

Riverbed-Level Variation

Multi-Functional Weir

Nays2DH

일반적으로 배사에 비해서 준설은 경제적 부담이 크기 때문에 배사를 효율적으로 운영하는 것이 중요하다. 본 연구에서는 2차원 하상변동 모형인 Nays2DH를 이용하여 홍수기 운영수위에 따른 배사효율을 낙동강에 위치한 달성보를 중심으로 분석하였다. 분석결과, 가동보의 수 만큼 배사수로가 형성되었으며, 배사수로 상류에는 퇴적이 발생하는 것으로 나타났다. 또한, 홍수기 운영수위를 EL. 14.5 m로 운영하는 것이 EL. 14.0 m로 운영하는 것에 비해서 배사효율이 약 4.6% 증가하여 퇴사가 약 4.5% 감소하는 것으로 나타났다. 본 연구에서 분석한 홍수기 운영수위에 따른 배사효율의 변화를 고려한다면, 저수지 퇴사 저감 및 준설주기의 장기화가 가능할 것으로 판단된다.

키워드

배사

하상변동

다기능보

Nays2DH

References

References

Ahn, J., Yang, C. T., Boyd, P. M., Pridal, D. B., and Remus, J. I. (2013). “Numerical modeling of sediment flushing from Lewis and Clark lake.” International Journal of Sediment Research, Elsevier, Vol. 28, pp. 182-193.10.1016/S1001-6279(13)60030-X

Ashida, K. and Michiue, M. (1972). “Study on hydraulic resistance and bed-load transport rate in alluvial streams.” Transactions, Japan Society of Civil Engineering, No. 206, pp. 59-64.10.2208/jscej1969.1972.206_59

Choi, S.-U. and Choi, S. (2012). “A quasi-steady model for sediment-ation and flushing of reservoirs.” J. Korea Water Resour. Assoc., KWRA, Vol. 45, No. 2, pp. 217-227.10.3741/JKWRA.2012.45.2.217

Cui, Y., Parker, G., Lisle, T. E., Gott, J., Hansler-Ball, M. E., Pizzuto, J. E., Allmendinger, N. E., and Reed, J. M. (2003). “Sediment pulses in mountain rivers: 1. Experiments.” Water Resources Research, AGU, Vol. 39, No. 9, p. 1239.10.1029/2002wr001803

Hajiabadi, R. and Zarghami, M. (2014). “Multi-objective reservoir operation with sediment flushing; case study of Sefidrud reservoir.” Water Resour Manage, Springer, Vol. 28, pp. 5357-5376.10.1007/s11269-014-0806-9

Jang, C.-L., Lim, K.-S., and Hwang, M. H. (2011). “Flushing sediment technique for mitigation of sedimentation in reservoir.” Water for Future, KWRA, Vol. 44, No. 11, pp. 45-49.

Jeong, A. and Jung, K. (2015). “Analysis of long-term riverbed-level and flood stage variation due to water gate operation of multi- functional weirs at Geum river.” J. Korea Water Resour. Assoc., KWRA, Vol. 48, No. 5, pp. 379-391.10.3741/JKWRA.2015.48.5.379

Jeong, A., Kim, S., Kim, M., and Jung, K. (2015). “Environmental windows setting method for environmental-friendly river dredging in Nakdong river basin.” Journal of environmental policy, Vol. 14, No. 4, pp. 45-61.

Ji, U. and Jang, E. K. (2016). “Numerical analysis of lateral geomor-phology changes by channel bed deposition and bank erosion at the river confluence section.” J. Korea Water Resour. Assoc., KWRA, Vol. 49, No. 5, pp. 391-398.10.1061/(ASCE)HY.1943-7900.0000395

Ji, U., Julien, P. Y., and Park, S. K. (2011). “Sediment flushing at the Nakdong river estuary barrage.” Journal of Hydraulic Engineering, ASCE, Vol. 137, No. 11, pp. 1522-1535.10.3741/JKWRA.2016.49.5.391

Kang, K.-H., Jang, C.-L., Lee, G. H., and Jung, K. (2016). “Numerical analysis of the morphological changes by sediment supply at the downstream channel of Youngju dam.” J. Korea Water Resour. Assoc., KWRA, Vol. 49, No. 8, pp. 693-705.10.3741/JKWRA.2016.49.8.693

Kondolf, G. M., Gao, Y., Annandale, G. W., Morris, G. L., Jiang, E., Zhang, J., Cao, Y., Carling, P., Fu, K., Guo, Q., Hotchkiss, R., Peteuil, C., Sumi, T., Wang, H.-W., Wang, Z., Wei, Z., Wu, B., Wu, C., and Yang, C. T. (2014). “Sustainable sediment management in reservoirs and regulated rivers: Experiences from five continents.” Earth’s Future, Vol. 2, No. 5, pp. 256-280.10.1002/2013EF000184

Krause, P., Boyle, D. P., and Base, F. (2005). “Comparison of different efficiency criteria for hydrological model assessment.” Advances in Geosciences, European Geosciences Union, Vol. 5, pp. 89-97.10.5194/adgeo-5-89-2005

Ku, Y. H., Song, C. G., Park, Y.-S., and Kim, Y. D. (2015). “A study on the field application of Nays2D model for evaluation of riverfront facility flood risk.” Journal of the Korean Society of Civil Engineers, KSCE, Vol. 35, No. 3, pp. 579-588.10.12652/Ksce.2015.35.3.0579

K-water (2012). Dam operational practices handbook.

Meyer-Peter, E. and Mueller, R. (1948). “Formulas for bed-load transport.” Proceedings of the 2^nd Meeting of the International Association for Hydraulic, International Association of Hydraulic Research, Delft, Sweden, pp. 39-64.

Nelson, J. M., Shimizu, Y., Abe, T., Asahi, K., Gamou, M., Inoue, T., Iwasaki, T., Kakinuma, T., Kawamura, S., Kimura, I., Kyuka, T., McDonald, R. R., Nabi, M., Nakatsugawa, M., Simoes, F. R., Takebayashi, H., and Watanabe, Y. (2016). “The international river interface cooperative: Public domain flow and morpho-dynamics software for education and applications.” Advances in Water Resources, Vol. 93, pp. 62-74.10.1016/j.advwatres.2015.09.017

Noh, J., Lee, K., Hur, Y., and Kim, Y. (2014). “Simulation of long-term reservoir sedimentation and flushing.” J. Korean Soc. Hazard Mitig., KOSHAM, Vol. 14, No. 4, pp. 333-341.10.9798/KOSHAM.2014.14.4.333

Shen, H. W. (1999). “Flushing sediment through reservoir.” Journal of Hydraulic Research, Vol. 37, No. 6, pp. 743-757.10.1080/00221689909498509

Shimizu, Y., Takebayashi, H., Inoue, T., Hamake, M., Iwasaki, T., and Nabi, M. (2014). iRIC Software: Nays2DH Solver Manual.

Wong, M. and Parker, G. (2005). “Reanalysis and correction of bed- load relation of Meyer-Peter and Muller using their own database.” Journal of Hydraulic Engineering, Vol. 132, No. 11, pp. 1159-1168.10.1061/(ASCE)0733-9429(2006)132:11(1159)

Yu, M., Lee, Y., and Yi, J. (2016). “Flood inflow forecasting on Hantan river reservoir by using forecasted rainfall.” J. Korea Water Resour. Assoc., KWRA, Vol. 49, No. 4, pp. 327-333.10.3741/JKWRA.2016.49.4.327

Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 49
No :12
Pages :971-980
Received Date : 2016-09-20
Revised Date : 2016-11-03
Accepted Date : 2016-11-03
DOI :https://doi.org/10.3741/JKWRA.2016.49.12.971

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

All Issue

References