We will (a) establish the physical processes that govern GLOF behaviour such as moraine-dam failure, ice-dammed lake drainage and slope instability; (b) analyse flood hydrographs of selected former GLOFs to establish downstream impacts. We will undertake research to understand the physical processes that govern the development of Glacial Lake Outburst Floods (GLOFs) in Peru: From the inventory in WP1, we will then identify currently developing GLOF sites and establish the locations of potential future GLOF sites. We will use these observations to establish the physical processes that govern GLOF behaviour in Peru including sites that may be prone to moraine-dam failure, the locations of sites likely to be sensitive to ice-dammed lake drainage and sites that are susceptible to rock slope failure. We will analyse flood hydrographs (where available) of selected former GLOFs and use these to establish the patterns of downstream impacts.