A 1000-year history of large floods in the Upper Ganga catchment, central Himalaya, India

摘要: Abstract Determining the frequency, magnitude and causes of large floods over long periods in flood-prone Himalaya is important for estimating likelihood future floods. A thousand year record (with some information from 2600 years ago) frequency estimates velocities discharges has been reconstructed Upper Ganga catchment, India, using written reports, litho-stratigraphy sedimentology, dated by optical radiocarbon methods. In catchment rainfall triggers landslides that dam rivers release amounts water when they burst, thereby amplifying effects rainfall. The may be result landslide bursts rather than glacial lake bursts, these are likely to continue possibly worsen as monsoon intensifies next century. However preliminary suggests recent devastating flood June 2013 was heavy not bursts. non-random shows a high between AD 1000 1300 (omitting uncertainties), then low until cluster occurred about 200 ago, increased frequency. This temporal pattern like but identical with Peninsular both appear variations monsoon.