This post is long overdue (sorry, it's been a long field season), but in case you haven't heard the news, Ryan Richardson successfully defended his Master's thesis back in July, completed a few minor revisions before the August deadline, and now has a richly deserved Master's degree in Geography from the University of Wyoming. A belated congratulations to Ryan - well done!
Along with colleagues from the USGS Geomorphology and Sediment Transport Laboratory, FRS team leader Carl Legleiter, traveled north to Alaska for a new project focused on remote sensing of river discharge. In this field-based preliminary study, we collected not only the usual field spectra but also thermal videography that we are now using to estimate water-surface velocities using a Particle Image Velocimetry (PIV) approach. Initial results are encouraging, for the optical as well as the thermal, data and we hope to return for airborne data collection in Spring 2017.
This summer our research group will be starting a new project on the Deschutes River in Oregon, focused on evaluating habitat conditions for the threatened Oregon Spotted Frog. We also will continue our work on Nebraska's Niobrara River, with a focus on estimating bed material transport rates by repeat hyperspectral imaging of mobile bedforms. These sites have been added to the map of study areas on the Fluvial Remote Sensing home page. The Publications, Contact, and personal page for Dr. Legleiter also were updated today.
IDQT paper now published online in Water Resources Research, code available on www.fluvialremotesensing.org
The paper "Inferring river bathymetry via Image-to-Depth Quantile Transformation (IDQT)," which introduces a new framework for remote sensing of river bathymetry, is now published online in Water Resources Research here, or obtain the PDF from our Publications page. In addition, MATLAB code for implementing the algorithm is available from our Tools page.
Paper on hydraulics of supraglacial streams on the Greenland Ice Sheet to be published in ESP&L, now available online
A paper with Colin Gleason and colleagues from UCLA and several other institutions that describes the hydraulics of supraglacial streams on the surface of the Greenland Ice Sheet has been accepted for publication in Earth Surface Processes and Landforms. The accepted manuscript, titled "Characterizing supraglacial meltwater channel hydraulics on the Greenland Ice Sheet from in situ observations," is now available from the journal's web site (DOI).
A paper describing a new approach to inferring water depth from passive optical image data based on probability distributions of image pixel values and depths has been accepted for publication in Water Resources Research. The final version of the paper will be posted on this site as soon as it is ready, along with code for implementing the IDQT algorithm.
A collaborative study with the National Center for Airborne Laser Mapping that compared the bathymetric capabilities of a hyperspectral imaging system and a a bathymetric LiDAR has been published in the current issue of Earth Surface Processes and Landforms. Please visit the journal's web site or our publications page to view the article.
Distinguished alum Devin Lea's latest paper appears in the current issue of Geomorphology:
Refining measurements of lateral channel movement from image time series by quantifying spatial variations in registration error
Visit the journal's web site or visit our publication page to obtain the article.
Fluvial Remote Sensing team leader Carl J. Legleiter has now joined the USGS' Geomorphology and Sediment Transport Laboratory as part of the National Research Program. Although Legleiter is now living in Golden, CO, he will maintain adjunct faculty status with the Department of Geography at the University of Wyoming. In fact, he will offer his specialty course on Remote Sensing of Rivers online for the Spring 2016 semester. At the USGS, Legleiter will continue to conduct research on the application of remote sensing to rivers.