Dear Colleagues,

The primary lens of ecohydrology is focused on understanding the distribution and abundance of biota in the context of how and why organisms are dependent on specific biophysical space (habitat) to complete one stage or another in their life cycles. Unfortunately, the spatial distribution and abundance of aquatic habitat is the least empirically quantified attribute of rivers and streams. This may be in part because little advancement has been made towards using remote sensing to assess flow velocity which is a requirement for defining aquatic habitat.

Development and application of remote sensing tools geared toward quantifying flow velocity could greatly enhance ecohydrological understanding of fluvial systems. This is especially true for regulated systems in need of environmental flow analysis aimed at minimizing harm to aquatic organisms from fish to rare plants through flow regulation by dam control or irrigation withdrawal.

New advances in hydro-acoustic river mapping, an emerging form of remote sensing of fluvial systems, allows direct empirical measurement of flow from the site scale to the river corridor scale covering 100’s of km. This approach should be linked to more traditional forms of aerial and satellite remote sensing of fluvial systems that have focused on the assessment of channel bathymetry, widths, depths, slopes, plan form complexity, substrate composition, surface water temperatures, and composition of riparian vegetation.

The focus of this special issue will be publishing studies that are striving to use and combine various forms of remote sensing to measure flow and discharge in rivers to better enhance our understanding of rivers in light of climate change and environmental flow management.

Dr. Mark S. Lorang
Guest Editor

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• aquatic habitat
• flow velocity
• discharge from space
• ecohydrology
• climate change
• hydro-acoustic remote sensing
• environmental flow analysis