Hydrology and Biogeochemical Dynamics from Catchment Headwater to Coasta; Groundwater
Abstract
Understanding surface water and groundwater interactions are fundamental to water resources management as surface and subsurface water are a single resource. These interactions, however, are variable and intricate. With a warming planet and changes in precipitation patterns and sea-level rise, it is essential to understand how to sustain our precious water resources. This dissertation presents research on pressing issues for hydrology and biochemistry from catchment headwaters to the coastal ocean.The first part, containing Chapters 1 and 2, concentrates on the hydrology and geochemistry at the terrestrial-marine interface, focusing on using in-situ high-frequency sensor measurements to understand biochemical processes in salt marsh systems at intra-tidal scales. Chapter 3, on the other hand, seeks to improve our understanding of the role of intra-annual catchment storage variation on runoff generation, with a particular interest in watersheds with long-term hydrology that places them close to the threshold between water- and energy-limitation.