92nd American Meteorological Society Annual Meeting (January 22-26, 2012)

Thursday, 26 January 2012: 9:15 AM
Evaluating the Impact of Hurricane Seasons 2004 and 2005 on the SE US Water Cycle
Room 352 (New Orleans Convention Center )
Julien Brun, Duke University, Durham, NC; and A. P. Barros

Hurricanes are regular events of varying magnitude and moderate frequency. These powerful and hazardous meteorological phenomena cause massive wind and flood damages to natural and built areas at landfall and along the storm terrestrial track. On the other hand, hurricanes provide a significant influx of freshwater resources to surface and subsurface reservoirs during the warm season, which is critical to water resources in the SE US. To this end, a remote sensed framework (based on MODIS EVI) was developed to characterize and monitor the spatial organization and time of recovery of vegetation disturbance over the entire southeastern US. Our work indicates that, over land, vegetation disturbance associated with flooding along the continental drainage networks is the dominant post-landfall impact. Here, we complement this framework with a regional water balance approach on the cataloging units as defined by the USGS to estimate the hurricane capacity to recharge underground reservoirs during the especially active hurricane seasons 2005 and 2004. A distributed eco-hydrological model combining water and energy budgets with photosynthesis activity was used over indexed watersheds characterized by distinct surface-groundwater interactions to investigate the link between vegetation disturbance persistence, hydrological processes, and basin hydrogeology.

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