Stability of Ballasted Woody Debris Habitat Structures
Publication: Journal of Hydraulic Engineering
Volume 126, Issue 11
Abstract
An important component of stream restoration in the Pacific Northwest is the reintroduction of large woody debris (LWD) and construction of LWD habitat structures in degraded systems. A significant problem faced by engineers involved in stream restoration is a lack of physically based guidelines for design and construction of ballasted LWD habitat structures. A simple theoretical approach is developed that forms the basis for determining ballast requirements for three types of LWD structures. Field monitoring and assessment were undertaken to test the approach and to compare predicted and observed stability for approximately 90 ballasted LWD structures. The results indicate that the stability of single-LWD and single-LWD with root wad structures can be successfully predicted by the theory. The stability of the multiple-LWD structures proved to be more complex to predict because numerous design and construction-related factors influence stability. A design approach based on factors of safety is recommended.
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References
1.
Abbe, T. B., and Montgomery, D. R. ( 1996). “Large woody debris jams, channel hydraulics and habitat formation in large rivers.” Regulated Rivers, Res. and Mgmt., 12, 201–221.
2.
Bustard, D. R., and Narver, D. W. ( 1975). “Aspect of the winter ecology of juvenile coho salmon (Oncorhynchus kisutch) and steelhead trout (Salmo gairdneri).” J. Fish. Res. Board Can., 32, 667–680.
3.
Cederholm, C. J., Dominguez, L. G., and Bumstead, T. W. ( 1997). “Rehabilitating stream channel and fish habitat using large woody debris.” Fish habitat rehabilitation procedures, P. A. Slaney and D. Zaldokas, eds., Watershed Restoration Tech. Circular No. 9, British Columbia Ministry of Environment Lands and Parks and British Columbia Ministry of Forests, 8-1–8-28.
4.
Cheng, E. D. H., and Clyde, C. G. ( 1972). “Instantaneous hydrodynamic lift and drag forces on large roughness elements in turbulent open channel flow.” Symp. to Honor Prof. H. A. Einstein: Sedimentation, H. W. Shen, ed.
5.
Chepil, W. S. ( 1958). “The use of evenly spaced hemispheres to evaluate aerodynamic forces on a soil surface.” Trans. Am. Geophys. Union, 39(3), 397–404.
6.
D'Aoust, S. G. ( 1998). “Large woody debris fish habitat structure—Performance and ballasting requirements.” MS thesis, University of British Columbia, Vancouver.
7.
Frissell, C. A., and Nawa, R. K. ( 1996). “Incidence and causes of physical failure of artificial structures in streams of western Oregon and Washington.” North Am. J. Fish. Mgmt., 12, 182–197.
8.
Gippel, C. J., O'Neill, I. C., and Finlayson, B. L. ( 1992). “The hydraulic basis of snag management.” Ctr. for Envir. Appl. Hydro., Dept. of Civ. and Agric. Engrg., University of Melbourne, Melbourne, Victoria, Australia.
9.
Harmon, M. E., et al. ( 1986). “Ecology of coarse woody debris in temperate ecosystems.” Adv. in Ecological Res., 15, 133–302.
10.
Hartman, G. F., and Miles, M. ( 1995). “Evaluation of fish habitat improvement projects in BC and recommendations on the development of guidelines for future work.” British Columbia Ministry of Environment Lands and Parks, Victoria, B.C., Canada.
11.
Henderson, F. M. ( 1966). Open channel flow, Macmillan, New York.
12.
Hicks, B. J., Hall, J. D., Bisson, P. A., and Sedell, J. R. ( 1991). “Responses of salmonids to habitat changes.” Influences of forest and rangeland management on salmonid fishes and their habitats, Spec. Publ. 19, W. R. Meehan, ed., American Fisheries Society, 483– 518.
13.
Hoerner, S. F. ( 1965). Fluid-dynamic drag, Published by author, N.J.
14.
Hogan, D. L., Bird, S. A., and Wilford, D. J. ( 1996). “Draft #1: Channel conditions and prescriptions assessment (interim methods).” Watershed Restoration Tech. Circular No. 7, British Columbia Ministry of Environment Lands and Parks and British Columbia Ministry of Forests, Victoria, B.C., Canada.
15.
Koonce, G. P. ( 1990). “Two-pin method for the layout of stream habitat enhancement designs.” Proc., 7th California Salmon, Steelhead, and Trout Restoration Conf.
16.
Koski, K. V. ( 1992). “Restoring stream habitat affected by logging activities.” Restoring the nation's marine environment, G. Thayer, ed., Maryland Sea Grant College, Md., 343–403.
17.
Millar, R. G., and D'Aoust, S. G. ( 1998). “Ballast requirements for LWD habitat structures.” Proc., ASCE Wetlands Engrg. and River Restoration Conf., ASCE, Reston, Va.
18.
Nehlsen, W., Williams, J. E., and Lichatowich, J. A. ( 1991). “Pacific salmon at the crossroads: Stocks at risk from California, Oregon, Idaho, and Washington.” Fisheries, 16(2), 4–21.
19.
Robinson, E. G., and Beschta, R. L. ( 1990). “Coarse woody debris and channel morphology interactions for undisturbed streams in Southeast Alaska, USA.” Earth Processes and Landforms, 15, 149–156.
20.
Shields, F. D., Jr. and Gippel, C. J. (1995). “Prediction of effects of woody debris removal on flow resistance.”J. Hydr. Engrg., ASCE, 121(4), 341–354.
21.
Shrivel, C. S. ( 1990). “Role of instream rootwads as juvenile coho salmon (Oncorhynchus kisutch) and steelhead trout (O. mykiss) cover habitat under varying streamflows.” Can. J. Fish. Aquat. Sci., 47, 852–861.
22.
Swanson, F. G., and Leinkaemper, G. W. ( 1978). “Physical consequences of large organic debris in Pacific Northwest streams.” U.S. Department of Agriculture, Forest Service, Portland, Oreg.
23.
Thomson, B. ( 1991). “Annotated bibliography of large organic debris (LOD) with regards to stream channels and fish habitat.” British Columbia Ministry of the Environment Tech. Rep. 32, Fisheries Branch, Victoria, B.C., Canada.
24.
Wood design manual. (1995). Canadian Wood Council, Ottawa.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 126 • Issue 11 • November 2000
Pages: 810 - 817
History
Received: Dec 4, 1998
Published online: Nov 1, 2000
Published in print: Nov 2000
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