SELECTIVE TRANSPORT AND ARMOURED LAYER DEVELOPMENT IN NONUNIFORM BED MATERIALS PART 1: NUMERICAL MODEL DEVELOPMENT

Arie Setiadi Moerwanto

Abstract


Pada sungai dengan material dasar sungai tidak seragam, ukuran butir, rapat massa dan keberadaan butirbutir
material terhadap aliran sungai akan sangat mempengaruhi gerak mula masingmasing
butir material
dasar sungai. Aliran sungai akan terlebih dahulu mengangkut material dasar sungai dengan ukuran butir
yang relatif kecil dan tidak terlindungi, sementara butirbutir
dengan ukuran yang lebih besar dan stabil
akan membentuk lapisan perisai di permukaan dasar sungai. Karena angkutan sedimen terpilah,
pembentukan lapisan perisai dan pembentukan corak dasar sungai sangat terkait erat dengan laju
angkutan sedimen, maka kecermatan penyimulasian fenomenafenomena
tersebut akan sangat
mempengaruhi ketelitian analisis kedalaman aliran, laju muatan sedimen dasar, laju angkutan sedimen
layang dan pada akhirnya juga akan mempengaruhi kecermatan analisis perubahan morfologi sungai.
Dalam tulisan bagian pertama ini dibahas dengan detail studi pustaka dan landasan teori untuk
pengembangan model numerik angkutan material sedimen terpilah, prediksi ketebalan lapisan aktif,
mekanisme pertukaran antara material dasar sungai, angkutan sedimen dasar dan angkutan sedimen
layang, pembentukan corak dasar sungai dan pembentukan lapisan perisai pada sungai dengan material
dasar sungai tidak seragam. Verifikasi dan penilaian unjuk kerja model numerik yang didesain diulas dalam
tulisan bagian kedua.


Keywords


Material tidak seragam dasar sungai, angkutan sedimen terpilah, corak dasar sungai, lapisan perisai, morfologi sungai.

References


Ackers, P. and W.R. White (1980). Bed material

transport: A theory for total load and its

verification. International Symposium on

River Sedimentation, Beijing, Paper B10.

Allen, J.R.L. (1965). Sedimentation to the lee of small

underwater sand waves: an experimental

study. Journal of Geology, Vol. 73, pp. 95?

Ashida, K. and M. Michiue (1973). Studies on bed load

transport rate in open channel flows.

Proceedings of IAHR, International

Symposium on River Mechanics. A.I.T.,

Bangkok, Vol. 1, Paper A?36, pp. 407?418.

Bayazit, M (1969). Resistance to reversing flow over

moveable beds. Journal of the Hydraulics

Division, ASCE, Vol. 95, No. HY4, pp. 1109?

Bennett, J.P. and C.F. Nordin (1977). Simulation of

sediment transport and armouring.

Hydrological Sciences Bulletin, Vol. XXII,

No. 4, pp. 555?569.

Borah, D.K., C.V. Alonso, and S.N. Prasad (1982).

Routing graded sediments in streams:

Formulations. Journal of Hydraulic Engineering,

ASCE, Vol. 108, No. HY12, pp.

?1503.

Carey, W.C. and M.D. Keller (1957). Systematic

changes in the beds of alluvial rivers,

Journal of the Hydraulics Division, ASCE,

Vol. 83, No. HY4, 24 p.

Celik, I. and W. Rodi (1988). Modeling suspended

sediment transport in non?equilibrium

situations. Journal of Hydraulic

Engineering, ASCE, Vol. 114, No.10, pp.

?1191.

Chin, C.O. (1985). Stream bed armouring. Report no.

? Department of Civil Engineering,

University of Auckland.

Chin, C.O., B.W. Melville and A.J. Raudkivi (1994).

Streambed armouring. Journal of Hydraulic

Engineering, ASCE, Vol 120, No. 8, pp. 899?

Day, T.A.J. (1980). A study of the transport of graded

sediment. Hydraulic Research Station

Report No. INT 190, Wallingford.

Egiazaroff, I.V. (1965). Calculation of non?uniform

sediment concentration. Journal of the

Hydraulics Division, ASCE, Vol. 91, No. HY4,

pp. 225?247.

Einstein, H.A. (1950). The bed?load function for

sediment transportation in open channel

flow. Technical Bulletin No. 1026, U. S.

Department of Agriculture, Washington, D.

C.

Fredsoe, J. (1979). Unsteady flow in straight alluvial

streams, Part 2: Modification of individual

dunes. Journal of Fluid Mechanics, Vol. 91,

pp. 479?512.

Fredsoe, J. (1981). Unsteady flow in alluvial streams,

Part 3: Transition from dunes to plane bed.

Journal of Fluid Mechanics, Vol. 102, pp.

?453.

Fredsoe, J. (1982). Shape and dimensions of

stationary dunes in rivers. Journal of the

Hydraulics Division, ASCE, Vol. 108, No.

HY8, pp. 932?947.

Gessler, J. (1967). The beginning of bed load

movement of mixtures investigated as

natural armouring in channels. W.M. Keck

Laboratory of Hydraulic and Water

resources, California Institute of

Technology, California.

Gill, M.A. (1971). Height of sand dunes in open

channel flows. Journal of the Hydraulics

Division, ASCE, Vol. 97, No. HY12, pp. 2067?

Gladki, H. (1975). Discussions of determination of

sand roughness for fixed beds. Journal of

Hydraulic Research, IAHR, Vol. 13, No. 2.

Graf, Walter H. (1971). Hydraulics of sediment

transport. McGraw?Hill, New York.

Hey, R.D. (1979). Flow resistance in gravel?bed rivers.

Journal of the Hydraulics Division, ASCE,

Vol. 105, No. HY4, pp. 365?379.

Holly, F.M. Jr. (1988). CHARIMA and SEDICOUP codes

for riverine mobile?bed simulation. Second

Seminar on Stream Sedimentation Models,

Sedimentation Sub?committee,

Interagency Advisory Committee on Water

Data, pp. 263 ? 351, Denver.

Holly, F.M. Jr. and J.L. Rahuel (1990). New numerical/

physical framework for mobile bed

modeling, Part I Numerical and physical

principles. Journal of Hydraulic Research,

IAHR, Vol. 28, No. 4, pp. 401? 416.

Laursen, E.M. (1958). The total sediment load of

streams. Journal of the Hydraulics Division,

ASCE, Vol. 84, No. HY1, pp. 1530?1 ? 1530?

Lyn, D.A. (1991). Resistance in flat bed sediment

laden flows. Journal of Hydraulic

Engineering, ASCE, Vol. 117, No. 1, pp. 94?

Moerwanto, A.S. (2011). Temporal Lag Effects of

Alluvial System Under Unsteady Flow

Conditions, Jurnal Teknik Hidraulik, Vol. 2,

no. 1, Juni 2011, pp. 1?16.

Phillips, B.C. (1984). Spatial and temporal lag effects

in bed?load sediment transport ? Civil

Engineering Research Report No. 84?10 ?

Reprint of PhD Thesis, Department of Civil

Engineering, University of Canterbury.

Phillips, B.C. and A. J. Sutherland (1990). Temporal lag

effects in bed load sediment transport.

Journal of Hydraulic Research, IAHR, Vol.

, No. 1, pp. 5?23.

Proffitt, G.T. and A.J. Sutherland (1983). Transport of

non?uniform sediment. Journal of

Hydraulic Research, IAHR, Vol. 21, No. 1,

pp. 33?43.

Rahuel, J.L., F. M. Holly, J. P. Chollet, P. J. Belleudy

and G. Yang (1989). Modeling of river bed

evolution for bed load sediment mixture.

Journal of Hydraulic Engineering, ASCE, Vol.

, No. 11, pp. 1521?1542.

Ribberink, J.S. (1987). Mathematical modeling of onedimensional

morphological changes in

rivers with non?uniform sediment. Delft

University of Technology, PhD Thesis.

Rijn, L.C. van (1982). Equivalent roughness of alluvial

bed. Journal of the Hydraulics Division,

ASCE, Vol. 108, No. HY10, pp. 1215?1218.

Rijn, L.C. van (1984a). Sediment transport, Part II Suspended

load transport. Journal of Hydraulic

Engineering, ASCE, Vol. 110, No. 11, pp.

?1641.

Rijn, L.C. van (1984b). Sediment transport, Part III

Bed forms and alluvial roughness. Journal

of Hydraulic Engineering, ASCE, Vol. 110,

No. 2, pp. 1733?1754.

Rijn, L.C. van (1993). Principles of sediment transport

in rivers, estuaries and coastal seas. Aqua

Publications, Amsterdam.

Simons, D.B. and E.V. Richardson (1961). Forms of

bed roughness in alluvial channels. Journal

of Hydraulic Engineering, ASCE, Vol. 87, No.

HY3, pp. 87?105.

Yalin, M.S. (1977). On the physical modeling of dunes.

Proceedings of XVIIth Congress, IAHR,

Baden?Baden, Vol. 1, Paper A4, pp. 25?32




DOI: https://doi.org/10.32679/jth.v2i2.248

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