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Geomorphic and forest cover controls on monsoon flooding, central Nepal Himalaya

Publication TypeJournal Article
Year of Publication1996
AuthorsMarston, R,; Kleinman, J,; Miller, M,
Journal TitleMountain Research and Development
Volume16
Pagination257-264
ISBN Number0276-4741
Key Wordsflooding; geomorphology; vegetation; forests; watersheds; deforestation
AbstractDevastating monsoon season floods in the central Nepal Himalaya have been difficult to predict with any precision, reliability, or accuracy. Deforestation is often blamed as the principal cause of flooding. This paper uses field data at 22 stream crossings, together with drainage basin morphometric data and forest cover data, to determine the dominant controls on bank-full discharge from monsoon storms. Results demonstrate that 82% of the variation in bank-full discharge can be explained as a function of drainage area alone; forest cover did not add explanatory power. Findings from this study can be used to guide planning for future projects that will be affected by flood hazards in the central Nepal Himalaya, including irrigation, hydropower, and footbridge construction.

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