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Land-Water Synthesis: Controls on the Regional Water Balances of Amazonia 1970-2005

Michael T Coe, The Woods Hole Research Center, mtcoe@whrc.org (Presenting)

The land surface of the Amazon is coupled to its rivers, streams and wetlands, through both hydrological and biogeochemical processes. Multiple factors, including, climate, land cover and land use, soil type, and topography influence the quantity and quality of surface water resources by determining: 1) how incoming precipitation and radiation are partitioned among sensible and latent heat fluxes, runoff, and river discharge; 2) soil water infiltration rates and surface and sub-surface flow; and 3) the biogeochemical properties of the land surface and solute leaching rates from soils. A better understanding of how regional differences in these factors influence soil moisture, water yield, and runoff is vital for understanding and predicting how local processes scale-up to observed regional patterns of stream transport and transformation of water and chemical constituents. Therefore, as part of the LBA Land-Water synthesis group we are combining data and models from various LBA groups to clarify the roles of individual factors in influencing the observed differences in water yield at regional and continental scales. This exercise will help us determine the tools and data required for cross-scale analysis of stream hydrology and chemistry.

Science Theme:  LC (Land Use and Land Cover Change)

Session:  2A: Hydrological and Meteorological Processes

Presentation Type:  Oral

Abstract ID: 28

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