Journal
LANDSLIDES
Volume 5, Issue 1, Pages 107-120Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10346-007-0107-y
Keywords
debris flows; fill slopes; loss of life and infrastructure; fill slope failure
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This paper describes early detection, warning, and loss prevention for debris flows originating as failures of fill slopes. Worldwide, fill slopes constructed on steep terrain for roads, hillside residential developments, timber harvest landings, etc., are an increasing source of debris-flow hazards. Some fill failures that generate debris flows are the final stage of incremental failures that provide warning signs of instability in the months or years before the debris flow. Mapping and analysis of minor features, such as cracks and small scarps, on paved or unpaved surfaces of fills can identify incipient and impending fill failures that are major debris-flow hazards. Potential debris-flow paths can be mapped and risk assessments conducted. Loss prevention or reduction can be achieved by (1) prioritized maintenance, (2) prioritized repair, (3) monitoring, (4) warnings for emergency officials and the public, and (5) risk avoidance or reduction in land-use planning, zoning, cooperation between jurisdictions, and project development.
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