@article{lyons_starek_wegmann_mitasova_2015, title={Bank erosion of legacy sediment at the transition from vertical to lateral stream incision}, volume={40}, ISSN={["1096-9837"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84943362977&partnerID=MN8TOARS}, DOI={10.1002/esp.3753}, abstractNote={Streambank erosion is a primary source of suspended sediments in many waterways of the US Atlantic Piedmont. This problem is exacerbated where banks are comprised of fine sediment produced by the intensive land use practices of early European settlers. A stream in this region, Richland Creek incises into banks comprised of three stratigraphic layers associated with historic land use: pre-European settlement, early European agriculture and development, and water-powered milldam operation. This study aims to identify the bank processes along a reach of Richland Creek that is eroding towards its pre-disturbance elevation. The volume of material that has eroded along this stream since the milldam breached was calculated by differencing a reconstructed surface of the pond bed and an aerial lidar digital terrain model (DTM). Immediately downstream from the study reach, the channel is floored by bedrock and immediately upstream the rate of channel erosion approximately doubled along the longitudinal profile of Richland Creek, which indicate that the study reach spans the transition from a channel dominated by vertical incision in the upstream direction to horizontal widening in the downstream direction. The combined hydrometeorological conditions and dominant processes causing reach-scale cut bank erosion were investigated with analyses of stream stage, precipitation, and streambank volumetric and surfaces change that was measured during nine terrestrial lidar surveys in 2010–2012. The spatial variability of erosion during a simulated precipitation event was examined in a field-based experiment. Erosion was greatest where mill pond sediment columns detached along vertical desiccation and horizontal seepage cracks. This sediment accumulated on the bank toe throughout the study and was a source of readily-entrained fine sediment contrary to the upper reaches where depositional accommodation space is more limited. Findings suggest that hotspots of sediment excavation progress upstream, indicating that restoration efforts should focus upon stabilizing banks at these locations. Copyright © 2015 John Wiley & Sons, Ltd.}, number={13}, journal={EARTH SURFACE PROCESSES AND LANDFORMS}, author={Lyons, Nathan J. and Starek, Michael J. and Wegmann, Karl W. and Mitasova, Helena}, year={2015}, month={Oct}, pages={1764–1778} }
 @article{lyons_mitasova_wegmann_2014, title={Improving mass-wasting inventories by incorporating debris flow topographic signatures}, volume={11}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84902003440&partnerID=MN8TOARS}, DOI={10.1007/s10346-013-0398-0}, number={3}, journal={Landslides}, author={Lyons, N.J. and Mitasova, Helena and Wegmann, K.W.}, year={2014}, pages={385–397} }
 @article{starek_mitasova_wegmann_lyons_2013, title={Space-Time Cube Representation of Stream Bank Evolution Mapped by Terrestrial Laser Scanning}, volume={10}, ISSN={["1558-0571"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84886592528&partnerID=MN8TOARS}, DOI={10.1109/lgrs.2013.2241730}, abstractNote={Terrestrial laser scanning (TLS) is utilized to monitor bank erosion along a stream that has incised through historic millpond (legacy) sediment. A processing workflow is developed to generate digital terrain models (DTMs) of the bank's surface from the TLS point cloud data. Differencing of the DTMs reveals that the majority of sediment loss stems from the legacy sediment layer. The DTM time series is stacked into a voxel model to form a space-time cube (STC). The STC provides a compact representation of the bank's spatiotemporal evolution captured by the TLS scans. The continuous STC extends this approach by generating a voxel model with equal temporal resolution directly from the point cloud data. Novel visualizations are extracted from the STCs to explore patterns in surface evolution. Results show that erosion is highly variable in space and time, with large-scale erosion being episodic due to bank failure within legacy sediment.}, number={6}, journal={IEEE GEOSCIENCE AND REMOTE SENSING LETTERS}, author={Starek, M. J. and Mitasova, H. and Wegmann, K. W. and Lyons, N.}, year={2013}, month={Nov}, pages={1369–1373} }
 @article{mitasova_harmon_weaver_lyons_overton_2012, title={Scientific visualization of landscapes and landforms}, volume={137}, ISSN={["1872-695X"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-82455187995&partnerID=MN8TOARS}, DOI={10.1016/j.geomorph.2010.09.033}, abstractNote={Scientific visualization of geospatial data provides highly effective tools for analysis and communication of information about the land surface and its features, properties, and temporal evolution. Whereas single-surface visualization of landscapes is now routinely used in presentation of Earth surface data, interactive 3D visualization based upon multiple elevation surfaces and cutting planes is gaining recognition as a powerful tool for analyzing landscape structure based on multiple return Light Detection and Ranging (LiDAR) data. This approach also provides valuable insights into land surface changes captured by multi-temporal elevation models. Thus, animations using 2D images and 3D views are becoming essential for communicating results of landscape monitoring and computer simulations of Earth processes. Multiple surfaces and 3D animations are also used to introduce novel concepts for visual analysis of terrain models derived from time-series of LiDAR data using multi-year core and envelope surfaces. Analysis of terrain evolution using voxel models and visualization of contour evolution using isosurfaces has potential for unique insights into geometric properties of rapidly evolving coastal landscapes. In addition to visualization on desktop computers, the coupling of GIS with new types of graphics hardware systems provides opportunities for cutting-edge applications of visualization for geomorphological research. These systems include tangible environments that facilitate intuitive 3D perception, interaction and collaboration. Application of the presented visualization techniques as supporting tools for analyses of landform evolution using airborne LiDAR data and open source geospatial software is illustrated by two case studies from North Carolina, USA.}, number={1}, journal={GEOMORPHOLOGY}, author={Mitasova, Helena and Harmon, Russell S. and Weaver, Katherine J. and Lyons, Nathan J. and Overton, Margery F.}, year={2012}, month={Jan}, pages={122–137} }