Abstract
Debris flows, debris floods and floods in mountainous areas are responsible for loss of life and damage to infrastructure, making it important to recognize these hazards in the early stage of planning land developments. Detailed terrain information is seldom available and basic watershed morphometrics must be used for hazard identification. An existing model uses watershed area and relief (the Melton ratio) to differentiate watersheds prone to flooding from those subject to debris flows and debris floods. However, the hazards related to debris flows and debris floods are not the same, requiring further differentiation. Here, we demonstrate that a model using watershed length combined with the Melton ratio can be used to differentiate debris-flow and debris-flood prone watersheds. This model was tested on 65 alluvial and colluvial fans in west central British Columbia, Canada, that were examined in the field. The model correctly identified 92% of the debris-flow, 83% of the debris-flood, and 88% of the flood watersheds. With adaptation for different regional conditions, the use of basic watershed morphometrics could assist land managers, scientists, and engineers with the identification of hydrogeomorphic hazards on fans elsewhere.
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References
Alley NF, Young GK (1978) Environmental significance of geomorphic processes in the northern Skeena Mountains and southern Stikine Plateau. BC Min Environ Res Anal Br Bull 3
Anonymous (1992) Forest inventory manual. BC Min Forests
Anonymous (1999) Mapping and assessing terrain stability guidebook. Forest practices code guidebook. BC Min Forests and BC Environ
Banner A, MacKenzie W, Haeussler S, Thomson S, Pojar J, Trowbridge R (1993) A field guide to site identification and interpretation for the Prince Rupert Forest Region. Land Manage Handb 26. BC Min Forests
Bovis MJ, Jakob M (1999) The role of debris supply conditions in predicting debris flow activity. Earth Surf Process Landforms 24:1039–1054
Carlston CW (1963) Drainage density and streamflow. US Geol Surv Prof Pap 422-C
Clague JJ (1984) Quaternary geology and geomorphology, Smithers-Terrace-Prince Rupert area, British Columbia. Geol Surv Can Mem 413
Costa JE (1988) Rheologic, geomorphic, and sedimentologic differentiation of water floods, hyperconcentrated flows, and debris flows. In: Baker VR, Kochel RC, Patton PC (eds) Flood geomorphology. Wiley, New York
Hetherington ED (1987) The importance of forests in the hydrological regime. In: Healey MC, Wallace RR (eds) Canadian aquatic resources. Can Bull Fish Aquat Sci 215
Holland SS (1964) Landforms of British Columbia: a physiographic outline. Bull no 48. BC Dept Mines Petrol Resour
Hungr O, Evans SG, Bovis MJ, Hutchinson JN (2001) A review of the classification of landslides of the flow type. Environ Eng Geosci 7(3):221–238
Jackson LE, Kostaschuk RA, MacDonald GM (1987) Identification of debris flow hazard on alluvial fans in the Canadian Rocky Mountains. In: Costa JE, Wieczorek GF (eds) Debris flows/avalanches: process, recognition, and mitigation. Rev Eng Geol vol. VII. Geol Soc Am
Mah S, Thomson S, Demarchi D (1996) An ecological framework for resource management in British Columbia. Environ Monitor Assess 39:119–125
Melton MA (1957) An analysis of the relation among elements of climate, surface properties and geomorphology. Office of Nav Res Dept Geol Columbia Univ, NY. Tech Rep 11
Milliken GA, Dallas E, Johnson DE (1992) Analysis of messy data, vol 1: Designed experiments. Van Nostrand Reinhold, New York
Murphey JB, Wallace DE, Lane LJ (1977) Geomorphic parameters predict hydrograph characteristics in the southwest. Water Resour Bull 13:25–38
Patton PC (1988) Drainage basin morphometry and floods. In: Baker VR, Kochel RC, Patton PC (eds) Flood geomorphology. Wiley, New York
Patton PC, Baker VR (1976) Morphometry and floods in small drainage basins subject to diverse hydrogeomorphic controls. Water Resour Res 12:941–52
Pojar J, Klinka K, Meidinger DV (1987) Biogeoclimatic ecosystem classification in British Columbia. Forest Ecol Manage 22:119–154
Runka GG (1972) Soil resources of the Smithers-Hazelton area. BC Dept Agr Soil Surv Division. Kelowna. BC
Ryder JM (1971a) The stratigraphy and morphology of paraglacial alluvial fans in south-central British Columbia. Can J Earth Sci 8:279–98
Ryder JM (1971b) Some aspects of the morphometry of paraglacial alluvial fans in south-central British Columbia. Can J Earth Sci 8:1252–1264
Sidle RC, Pearce AJ, O’Loughlin CL (1985) Hillslope stability and land use. Water Res Monogr 11. Am Geophys Union Wash
Strahler AN (1952) Hypsometric (area-altitude) analysis of erosional topography. Geol Soc Am Bull 63:1117–42
Strahler AN (1958) Dimensional analysis applied to fluvially eroded landforms. Geol Soc Am Bull 69:279–99
VanDine DF (1985) Debris flows and debris torrents in the southern Canadian Cordillera. Can Geotech J 22:44–68
Wells SG, Harvey AM (1987) Sedimentologic and geomorphic variations in storm-generated alluvial fans, Howgill Fells, northwest England. Geol Soc Am Bull 98:182–198
Acknowledgements
We are indebted to the British Columbia Ministry of Forests, the British Columbia Forest Investment Account Research Program, and the University of British Columbia Faculty of Forestry for support in this project.
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Wilford, D.J., Sakals, M.E., Innes, J.L. et al. Recognition of debris flow, debris flood and flood hazard through watershed morphometrics. Landslides 1, 61–66 (2004). https://doi.org/10.1007/s10346-003-0002-0
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DOI: https://doi.org/10.1007/s10346-003-0002-0