臺灣博碩士論文加值系統

丁壩為河川常見之橫向水工建造物。藉由丁壩傳遞適宜之人為擾動，可改變水流沖刷勢能在河床上之分布，進而達到保護岸壁邊界之目的。不過目前相關丁壩研究，仍多著墨於單座丁壩壩頭之局部沖刷及束縮沖刷，鮮少從丁壩群角度切入，探討河道主流泥砂進入丁壩壩田落淤之運移路徑、及分析不同水流條件下丁壩壩田泥砂流失機制等課題。因此，本研究以臺灣濁水溪流域為研究對象，透過現場調查取得實際丁壩局部深度變化、透過數值模式分析現場丁壩壩田可能之掛淤深度、透過實驗水槽分析丁壩壩田泥砂運移路徑等，隨後整合相關分析內容，釐清現場丁壩壩頭局部沖刷與壩田泥砂掛淤機制之運行規則。根據研究成果，相同入流條件下，丁壩在未浸沒時保持壩田完整之能力優於浸沒時；而浸沒時各壩田泥砂之流失情形，可透過首座丁壩壩頭局部沖刷深度、往下游距離及壩高-水深比等參數，加以估算。此外，利用現場觀測資料提出局部沖刷公式，用以預測研究範圍內丁壩局部沖刷變化，並提出相關丁壩設計改善建議供參。

Spur dikes are hydraulic structures that extend from a river bank into the river channel, and in on-site applications, they are present in groups. In river engineering, spur dikes have diverse functions. When applied to erodible banks, spur dikes can deflect near-bank currents to the river center. In addition, the recirculation zones behind spur dikes have a slow flow velocity, which increases sedimentation at the riverbank footing and reduces riverbank erosion. Although spur dikes serve multiple river management functions, their inherent structure hampers water flow from upstream to downstream. Thus, when water flows approach a group of spur dikes, the potential energy of the flows is increased to overcome the resistance engendered by the spur dikes. This increase in potential energy indicates that water flows passing through spur dikes demonstrate increasing turbulence intensity of flow, resulting in complex bed change near spur dikes. The local scour issue of a single spur dike has been studied by many researches, but fewer studies analyzed local scour of spur dikes. In addition, less study discussed the relationship between local scour mechanism and sediment exchange around spur dike field. Based on the field investigation, numerical simulation and flume experiment, this study explained the mechanism of spur dike scour and sediment loss in the spur dike fields. In the submerged case, the sediment loss in the spur dike fields caused by upward vortex and the scour zone development of first spur dike. The thickness of sediment loss in the spur dike fields can be calculated by local scour depth of first spur dike, the distances from upstream and overtopping rate. In the emerged case, the sediment loss in spur dike field is less than the submerged case. Moreover, an empirical formula was developed to estimate the maximum scour depth around the on-site spur dike group.

摘要 I
Abstract II
誌謝 III
目錄 IV
表目錄 VI
圖目錄 VII
符號說明 X
一、前言 1
二、文獻回顧與研究流程說明 2
2.1 丁壩流場 4
2.2 丁壩束縮沖刷 6
2.3 丁壩局部沖刷 7
2.4 丁壩掛淤機制 10
2.5 丁壩實際應用案例 12
2.6 研究課題與流程 18
三、現場河川丁壩沖刷試驗調查與分析 20
3.1 濁水溪丁壩沖刷試驗場址簡介 21
3.2 現場沖刷試驗之無因次參數分析 23
3.3 現場沖刷量測佈置 25
3.4 沖刷量測成果彙整 30
3.4.1 各沖刷觀測河段代表斷面之基本特性分析 31
3.4.2 觀測成果彙整 - 2012年7月30日 ~ 8月3日蘇拉颱風 33
3.4.3 觀測成果彙整 - 2013年7月 11 ~ 13日蘇力颱風 36
3.4.4 觀測成果彙整 - 2013年8月 17 ~ 23日潭美颱風 38
3.4.5 觀測成果彙整 - 2013年 9月 19 ~ 22日天兔颱風 41
3.4.6 觀測成果彙整 - 2016年 7月 6 ~ 9日尼伯特颱風 44
3.5 現場沖刷調查成果分析 47
3.5.1 河道條件與丁壩局部沖刷深度之關係探討 47
3.5.2 現場丁壩局部沖刷深度推估 54
3.5.3 壩田淤積深度保護效果分析 55
3.5.4 現場調查分析試驗成果小結 56
四、丁壩局部沖刷與掛淤機制之動床物模試驗分析 62
4.1 模型試驗參數無因次分析 62
4.2 試驗佈置與實驗步驟 64
4.2.1 實驗設備 64
4.2.2 實驗步驟 70
4.2.3 試驗案例說明 71
4.3 物模試驗成果分析與討論 73
4.3.1 不同壩高-水深比與丁壩壩田底床變動間之關係 73
4.3.2 丁壩掛淤泥砂運移與壩田平面剪力層分佈之關係 86
4.3.3 丁壩掛淤泥砂運移與壩田垂向流速分佈之關係 93
五、結論與建議 98
參考文獻 101
附錄一 現場局部沖刷調查紀錄原稿 106
附錄二 PIV質點影像測速法理論 115
附錄三 CCHE2D模式理論基礎與使用限制 124

1. Ahmad, M., (1953) Experiments on design and behavior of spur dikes. In: Proceedings of Minnesota International Hydraulics Convention, ASCE, Sep 1-4, Minnesota, United States, pp 145-159.
2. Blench, T., (1969) Mobile-bed fluviology. University of Alberta Press, Edmonton, Canada.
3. Briaud, J.L., Gardoni, P., Yao, C., (2012) Bridge Scour Risk. Proceedings of International Conference on Scour and Erosion (ICSE-6), August 27-31, Paris, France, pp 1193-1210.
4. Brown, S.A., (1985) Design of spur-type streambank stabilization structures. Rep. FHWA/RD-84/101, Sutron Corporation, Herndon, VA.
5. Carstens, T., (1976) Seabed Scour by currents near platforms. 3rd Conference on Port and Ocean Engineering under Arctic Conditions, University of Alaska, pp 991-1006.
6. Cunha, L.V., (1973) Discussion of erosion of sand beds around spur dikes. Journal of the Hydraulics Division, ASCE 99(HY9): 1637-1639.
7. Dongol, D.M.S., (1994) Local scour at bridge abutment. Rep. No. 544, school of Engineering, University of Auckland, Auckland, New Zealand.
8. Fincham, A. M. and Spedding, G. R., (1997) Low cost, high resolution DPIV for meaurement of turbulent fluid flow. Experiments in Fluids, Vol. 23, pp. 449-462.
9. Fazli, M., Ghodsian, M., Neyshabouri, S.A.A.S., (2008) Scour and flow field around a spur dike in a 90° bend. International Journal of Sediment Research, 23(1): 56-68.
10. Garde, R.J., Subramanga, K., Nambudripad, K.D., (1961) Study of scour around spur dikes. Journal of the Hydraulics Division, ASCE, 87(HY6): 23-27.
11. Ghodsian, M., Vaghefi, M., (2009) Experimental study on scour and flow field in a scour hole around a T-shape spur dike in a 90° bend. International Journal of Sediment Research, 24(2): 145-158.
12. Gill, M.A., (1972) Erosion of sand beds around spur dikes. Journal of the Hydraulics Division, ASCE, 98(HY9): 1587-1602.
13. Hoffmans, G.J.C.M., Verheij, H.J., (1997) Scour Manual. A.A.Balkema, BR Rotterdam, Nethrland.
14. Huang, H., Dabiri, D., and Gharib, M., (1997) On errors of digital particle image velocimetry. Meas. Sci. Tech., Vol. 8, pp. 1427-1440.
15. Huang, H. T. and Fiedler, H. E., (1997) A DPIV study of a starting flow downstream of a backward-facing step. Experiments in Fluids, Vol. 23, pp. 395-404.
16. Huang, H. T., (1998) An extension of digital PIV-processing to double-exposed images. Experiments in Fluids, Vol. 24, pp. 367-372.
17. Inglis, C.C., (1949) The behavior and control of rivers and canals. Research publication No. 13, Parts I and II, Central Waterpower Irrigation and Navigation Research Station, Poona, India.
18. Jaw, S. Y. and Wu, J. L., (2000) Alternating color image anemometry and its application. Journal of Flow Visualization and Image Processing, Vol. 7, pp. 189-205.
19. Jia, Y., Wang, S.S.Y., (1999) Numerical model for channel flow and morphological change studies. Journal of Hydraulic Engineering, 125(9): 924-933.
20. Jia, Y., Wang, S.S.Y., (2001) CCHE2D: Two-dimensional hydrodynamic and sediment transport model for unsteady open channel flows over loose bed. Technical Rep. NCCHE-TR-2001-1, National Center for Computational Hydro-science and Engineering, The University of Mississippi, USA.
21. Keane, R. and Adrian, R., (1990) Optimization of particle image velocimeters, part I, double pulsed systems. Measurement Science and Technology, Vol. 1, No. 11, pp. 1202-1215.
22. Klingeman, P.C., Kehe, S.M., and Owusu, Y.A., (1984) Streambank Erosion Protection and Channel Scour Manipulation Using Rockfill Dikes and Gabions., Rep. WRRI-98, Water Resources Research Institute, Oregon State University, Corvallis, Oregon.
23. Laursen, E.M., (1960) Scour at bridge crossings. Journal of the Hydraulics Division, ASCE 86(HY2): 39-54.
24. Laursen, E.M., (1962b) Discussion of study of scour around spur dikes. Journal of the Hydraulics Division, ASCE 89(HY3): 225-228.
25. Laursen, E.M., (1980) Predicting scour at bridge piers and abutments. General Report No. 3, Arizona Department of Transportation, Phoenix, AZ.
26. Lim, S.Y., (1997) Equilibrium clear-water scour around an abutment. Journal of Hydraulic Engineering, 123(3): 237-243.
27. Lin., W.J., Lin., C., Hsieh., S.C., Li., C.C., and Raikar., R.V. (2009) Characteristics of Shear Layer Structure in Skimming Flow over a Vertical Drop Pool. Journal of Engineering Mechanics, 135(12): 1452-1466.
28. Liu, H.K., Chang, F.M., Skinner, M.M., (1961) Effect of bridge-construction on scour and backwater. Rep. CER60-HKL22, Dept of Civil Engineering, Colorado State University, Fort Collins, Colo.
29. Lu, J.Y., Hong, J.H., Su, C.C., Wang, C.Y., Lai, J.S., (2008) Field Measurements and Simulation of Bridge Scour Depth Variations during Floods. Journal of Hydraulic Engineering, 134(6): 810-821.
30. Mccoy, A. Constantinescu, G. and Weber, L. (2007), A numerical investigation of coherent structuresand mass exchange processes in channel flowwith two lateral submerged groynes, Water Resources Research, Vol. 43. W05445.
31. Nogueira, J., Lecuona, A., and Rodriguez, P. A., (1997) Data validation, false vectors correction and derived magnitudes calculation on PIV data. Measurement Science and Technology, Vol. 8, pp. 1493-1501.
32. Przedwojski, B., (1995) Bed topography and local scour in rivers with banks protected by groynes. Journal of Hydraulic Research, 33(2): 257-273.
33. Rajaratnam, N., Nwachukwu, B.A., (1983) Erosion near groyne structures. Journal of Hydraulic Research, 21(4):227-287.
34. Richardson, E.V., Simons, D.B., Julien, P.Y., (1990) Highways in the river environment. Rep. FHWA-HI-90-016, Dept of Civil Engineering, Colorado State University, Fort Collins, Colo.
35. Su, C.C., Lu, J.Y., (2013) Measurements and prediction of typhoon-inducedshort-term general scours in intermittent rivers. Natural Hazards, 66:671-687.
36. Sukhodolov, A.N., (2014) Hydrodynamics of groyne fields in a straight river reach: insight from field experiments. Journal of Hydraulic Research, 52(1): 105-120.
37. Suzuki, K., Michiue, M., Hinokidani, O., (1987) Local bed form around a series of spur dikes in alluvial channels. Proceedings of XXII IAHR Congress, August 31 - September 4, Lausanne, Switzerland, pp 316-321.
38. Ten Brinke, W.B.M., Kruyt, N.M., Kroon, A., Van Den Berg, J.H., (1999) Erosion of sediments between groynes in the River Waal as a result of navigation traffic. In: Fluvial Sedimentology VI, Blackwell Publishing Ltd., Oxford, UK.
39. Wang, T. W., Yanapirut, N. (1988) Channel bed degradation caused by constriction. 6th Congress, Asian and Pacific Regional Division, IAHR, Kyoto, Japan, pp. 285-292.
40. Westerweel, J., (1994) Efficient detection of spurious vectors in particle images velocimetry data. Experiments in Fluids, Vol. 16, pp. 236-247.
41. Willert, C. and Gharib, M., (1991) Digital particle image velocimetry. Experiments in Fluids, Vol. 10, pp. 181-193.
42. Yeh, K.C., (2013) Efficiency evaluation of Choshui river's existing spur dikes for protecting lateral erosion and longitudinal scour/deposoition. Rep. MOEAWRA 1020034, Water Resources Agency, Ministry of Economic Affairs, Taiwan, (In Chinese).
43. Yossef, M.F.M., (2002) The Effect of Groynes on Rivers. Delft University of Technology, Faculty of Civil Engineering and Geosciences Section of Hydraulic Engineering, Nederland.
44. Yossef, M.F.M., de Vriend, H.J., (2010) Sediment exchange between a river and its groyne fields: mobile-bed experiment. Journal of Hydraulic Engineering, 136(9): 610–625.
45. Zhang, H., Nakagawa, H., Mizutani, H., (2012) Bed morphology and grain size characteristics around a spur dyke. International Journal of Sediment Research, 27(2): 141-157.
46. 臺灣省水利局(1981)，「防洪工程規劃講義」。
47. 經濟部水利署水利規劃試驗所 (2007)，「濁水溪本流治理規劃檢討」。
48. 經濟部水利署第四河川局 (2007)，「濁水溪常受損河段治理工法研究(上、下)」。
49. 經濟部水利署水利規劃試驗所 (2009)，「多砂河川流路變遷穩定工法之研究」。
50. 經濟部水利署第四河川局 (2010)，「濁水溪輸砂特性及推移質觀測研究」。
51. 經濟部水利署(2011)，「河川復建工程工法檢討及技術圖說資料庫建置」。
52. 經濟部水利署水利規劃試驗所 (2011)，「濁水溪流域整體治理規劃檢討」。
53. 經濟部水利署 (2011)，「水利工程技術規範-河川治理篇」。
54. 經濟部水利署第四河川局 (2012)，「濁水溪水系危險潛勢河段堤基沖刷之研究」。
55. 經濟部水利署第四河川局 (2013)，「濁水溪現行丁壩工法於側向侵蝕與縱向沖刷之效能檢討」。