Organizational principles of hyporheic exchange flow and biogeochemical cycling in river networks across scales

In this chapter, the authors provide a comprehensive analysis and synthesis of the interactions between important drivers and controls of hyporheic exchange and biogeochemical cycling and how they vary across scales, integrating results from a wide range of case studies that go beyond current conceptual model frameworks. They discuss the interactions of different local-to-regional controls and drivers of hyporheic zone processes such as hydrodynamic and hydrostatic drivers of hyporheic exchange, sediment hydraulic conductivity, the role of autochthonous organic matter sources, and feedbacks between hydrological exchange and ecological processes in the streambed. The authors explore the implications of these interactions for biogeochemical cycling in the landscape context. They integrate conceptualizations of organizational principles of hyporheic exchange and biogeochemical cycling from reach to catchment scale. The authors expect that increasing awareness and embracing the landscape organizing principles of hyporheic zones will advance the future of research at groundwater–surface water interfaces.