Long lasting dynamic disequilibrium in river basins Conference Paper uri icon

abstract

  • The river basins of ancient landscapes such as the southeastern United States exhibit disequilibrium in the form of migrating divides and stream capture. This observation is surprising in light of the relatively short theoretical fluvial response time, which is controlled by the celerity of the erosional wave that propagates upstream the fluvial channels. The response time is believed to determine the time required for fluvial landscapes to adjust to tectonic, climatic, and base-level perturbations, and its global estimations range between 0.1 Myr and 10s Myr. To address this discrepancy, we develop a framework for mapping continuous dynamic reorganization of natural river basins, and demonstrate the longevity of disequilibrium along the river basins in the southeastern United States that are reorganizing in response to escarpment retreat and coastal advance. The mapping of disequilibrium is …

publication date

  • January 1, 2014