Human impact on geomorphic processes and hazards in mountain areas in northern Spain

Detailed analysis of landslide frequency during that 43-year period has also been used to produce and validate landslide susceptibility models and obtain landslide hazard maps with known prediction accuracy. Validation tests were carried out comparing susceptibility maps based on landslides that have occurred in the past with the ones occurring in several, later periods. Prediction capability of models could thus be determined. Validation of susceptibility maps using data derived from the temporal analysis of landslides was used to obtain hazard maps expressed as probability of new ruptures in a given time period, on the basis of past trends in terrain behaviour. Possible impacts of a growing influence of human activities on the terrain have been incorporated into the assessment of future hazards by considering different scenarios.