Results 91 to 100 of about 6,775,722 (342)

Mapping River Bed Topography in Whitewater Rapids Using Bathymetric LiDAR

River Research and Applications, EarlyView.
ABSTRACT Bathymetric LiDAR captures river topography efficiently for clear and shallow water, but for mountain rivers, whitewater rapids still pose challenges. This study proposes a novel method to enable the extraction of bottom returns specifically in turbulent whitewater sections.
Jan Rhomberg‐Kauert, Theresa Himmelsbach, Florian Pöppl, Lucas Dammert, Martin Pfennigbauer, Gottfried Mandlburger   +5 more
wiley   +1 more source

Long-Term Eutrophication in Mesotrophic–Eutrophic Lake Kawaguchi, Japan, Based on Observations of the Horizontal Distribution of Profundal Chironomid Larvae and Oligochaetes

Limnological Review
Many researchers have used the species composition, relative abundance and distribution pattern of profundal benthic macroinvertebrate communities in particular, especially chironomid fauna, as indicators of the trophic state and pollution of lakes.
Kimio Hirabayashi, Masaaki Takeda
doaj   +1 more source

Elasmobranch spatial segregation in the western Mediterranean

Scientia Marina, 2011
Basic information on the distribution and habitat preferences of ecologically important species is essential for their management and protection. This study focuses on the depth related trends and the geographic patterns that shape the community of the ...
Adam Gouraguine, Manuel Hidalgo, Joan Moranta, David M. Bailey, Francesc Ordines, Beatriz Guijarro, María Valls, Carmen Barberá, Aina De Mesa   +8 more
doaj   +1 more source

ALB Evaluation for NOAA charting requirements [PDF]

, 2013
The National Oceanic and Atmospheric Administration (NOAA) acquires hydrographic data around the coasts of the US and its territories using in-house surveys and contracting resources. Hydrographic data are primarily collected using sonar systems, while a
Imahori, Gretchen, Parrish, Christopher E, Pe\u27eri, Shachak   +2 more
core   +1 more source

Hypsometry and Volume of the Arctic Ocean and Its Constituent Seas [PDF]

, 2002
This paper presents an analysis of the Arctic Ocean and its constituent seas for seafloor area distribution versus depth and ocean volume. The bathymetry from the International Bathymetric Chart of the Arctic Ocean (IBCAO) is used together with limits ...
Aagard, Bischof, Brozovic, Dawes, Dyke, Elverhøi, Fairbanks, Grosswald, Guilderson, Head Department of Navigation and Oceanography (HDNO), Jakobsson, Jakobsson, Kleiber, Mangerud, Martin Jakobsson, Menard, Nørgaard-Pedersen, Pusharovsky, Rudels, Smith, Soluri, Svendsen, Wessel   +22 more
core   +2 more sources

Strategies for Assessing Post‐Wildfire Geomorphic Resilience in Semiarid Rivers

River Research and Applications, EarlyView.
ABSTRACT We review and summarize diverse components of a catchment that can be monitored after wildfire to assess the geomorphic resilience of the river corridor in semiarid regions. We distinguish upland portions of river catchments from river corridors.
Ellen Wohl, Shayla Triantafillou, Alex Thornton‐Dunwoody, Connor Mertz, Katie Larkin, William Keenan, Steven Griffin, Dylan Davis, Lindsey Blehm   +8 more
wiley   +1 more source

Glacial cycles drive variations in the production of oceanic crust

, 2014
Glacial cycles redistribute water between oceans and continents causing pressure changes in the upper mantle, with consequences for melting of Earth's interior.
Crowley, John W., Huybers, Peter J., Katz, Richard F., Langmuir, Charles H., Park, Sung-Hyun   +4 more
core   +1 more source

Lessons Learnt From Long‐Term Monitoring of River Restoration in an English Chalk Stream

River Research and Applications, EarlyView.
ABSTRACT River restoration can be difficult to evaluate due to insufficient monitoring over timescales too short to adequately capture physical and ecological response. To better understand restoration outcomes, this study quantified changes in physical habitat (depth, velocity, substrate composition) and macroinvertebrates at two restoration projects ...
Lewis A. Dolman, Andrew S. Vowles, Paul S. Kemp   +2 more
wiley   +1 more source

The Impact of Acoustic Imaging Geometry on the Fidelity of Seabed Bathymetric Models [PDF]

, 2018
Attributes derived from digital bathymetric models (DBM) are a powerful means of analyzing seabed characteristics. Those models however are inherently constrained by the method of seabed sampling. Most bathymetric models are derived by collating a number
Hughes Clarke, John E.
core   +4 more sources

Meander‐Bend Erosion Dynamics Along a Gravel‐Bed River: Insights From Short‐Term UAV Monitoring

River Research and Applications, EarlyView.
ABSTRACT Riverbank erosion is a natural process in meandering rivers that contributes to sediment supply and geomorphic diversity, yet it can threaten infrastructure and human activities within the floodplain. Recently, many studies have used high‐resolution remote sensing technologies to measure bank erosion, but they often focus on technical aspects ...
Katarina Pavlek, Mateo Gašparović, Tomáš Galia   +2 more
wiley   +1 more source