Phase VI-VII:

Illustrations

Participants

Phases VI and VII (2010-2016)

Future phases will include generalizations of RET from a single link to the entire network to test the hypothesis of SSSON in RET, inclusion of biogeochemical cycles and stream ecology, and more extensive assessments of human impacts on ordered river networks. A recent National Research Council (2002) publication identifies streamflow as the master variable that controls functioning of riparian areas. Indeed, hydrologic fluxes provide the foundation for biogeochemical fluxes in watersheds. In Phases VI and VII, the HK observational networks will be extended from a single link-hillslope to selected linkhillslopes of different orders and include measurements of water quality variables to quantify carbon, nitrogen and phosphorus cycling in the Whitewater Basin, and to investigate Horton laws and SSSON therein. In parallel, CUENCAS will be enhanced to include the transport and transformation of these elements in hillslopes, the riparian zone and the stream. An ecohydrologic component will also be included, wherein long-term responses of vegetation to trends in climate and land-use can be modeled and tested against evidence from a novel application of tree-ring analysis.