Colonization of a man-made gravel bar by Oligochaeta

Hydrobiologia ◽  
1989 ◽  
Vol 180 (1) ◽  
pp. 229-234 ◽  
Author(s):  
C. Rex Bingham ◽  
Andrew C. Miller
Keyword(s):  
Gravel Bar

Effect of a reservoir release on the morphology of a gravel bar

2007 ◽  
pp. 1029-1036 ◽  
Author(s):  
M Jodeau ◽  
A Paquier ◽  
A Hauet ◽  
J Coz ◽  
F Thollet ◽  
...  
Keyword(s):  
Reservoir Release ◽  
Gravel Bar

scholarly journals Population dynamics of five riverbed breeding bird species on the lower Drava River, NE Slovenia

Acrocephalus ◽  
2017 ◽  
Vol 38 (174-175) ◽  
pp. 85-126
Author(s):  
Luka Božič ◽  
Damijan Denac
Keyword(s):  
Population Dynamics ◽  
Bird Species ◽  
Breeding Population ◽  
Population Increase ◽  
General Situation ◽  
Breeding Bird ◽  
Main River Channel ◽  
Extreme Flood ◽  
Gravel Bars ◽  
Gravel Bar

AbstractIn 2006–2017, annual censuses of breeding bird species regarded as indicators of natural rivers were carried out on the 38.9 km long lowland stretch of the Drava riverbed between Maribor and Zavrč with altered flow regime due to the operating hydropower plants. Gravel bar habitats were surveyed in four years of the study period by combining orthophoto analysis and analysis of field photographs. Effects of gravel bar management were evaluated based at 20 locations. The Little Ringed PloverCharadrius dubiusoccurred on 39.8% of the gravel bars, but most were occupied only in a few years and held just one breeding pair. Low numbers between 2009 and 2012 (< 30 pairs) were followed by a steep population increase from 2014 onwards to a maximum of 66–73 pairs (1.7–1.9 p/km). Such population dynamics was attributed to the lack of large discharges (>500 m3/s) and consequent overgrowing of riverbed in the first part of the study period, while the increase in the second part was due to the creation of extensive shingle areas (from 20,6 ha in 2009/10 to 37,8 ha in 2014) by the extreme flood in early November 2012, subsequent regular occurrence of large discharges outside the breeding seasons and large-scale removals of woody vegetation. Breeding population of Common SandpiperActitis hypoleucosremained at a rather similar low level (<20 p) during most of the period studied after an initial decline, and did not reflect changes in the overall surface area of riverbed habitats. Contrary to the general situation, the number of breeding pairs on gravel bars subjected to management increased several-fold. Maximum number of pairs on these bars was reached up to four years after the initiation of management measures, as only then the optimal mosaic of early successional stages interspersed with shingle areas developed at main sites. The species was widespread only on lower part of the Drava. KingfisherAlcedo atthiswas fairly widely distributed along the riverbed, but occurred in rather low densities throughout (c. one pair on 2–3 km of the studied riverbed on average), probably as a result of limited bank erosion and consequent overgrowing/lack of suitable nest sites. The population was estimated as stable with effects of harsh winter conditions on breeding numbers in some years. The majority of nest holes were excavated in eroded river banks along the main river channel (77.8%), followed by similar sites located in mouth areas of small tributaries of the Drava (14.8%). Regular breeding of Sand MartinRiparia ripariasince 2012 (up to 259, mostly at only one location annually) was almost exclusively the result of the annual artificial nest site preparation programme. Fairly large gravel bar-breeding population of White WagtailMotacilla alba, monitored since 2013 and predominantly ground nesting in sparsely vegetated areas, seems unusual considering the prevalent breeding habits of the species at the European scale. Conservation implications and guidelines for future management efforts are discussed.

scholarly journals Evaluation of the deposit dynamics on a gravel bar after different hydrologic events

2020 ◽  
pp. 919-927
Author(s):  
J. Deng ◽  
B. Camenen ◽  
T. Drevet ◽  
L. Pnard
Keyword(s):  
Gravel Bar

Spatial Distribution and Dynamics of Vegetation on a Gravel Bar: Case Study in the Bangtae Stream.

2013 ◽  
Vol 46 (2) ◽  
pp. 215-224
Author(s):  
Jung-Hun Pee ◽  
◽  
Hye-Soo Kim ◽  
Gyung-Soon Kim ◽  
Woo-Seok Oh ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Gravel Bar ◽  
Dynamics Of Vegetation

Colonization of a man-made gravel bar by Oligochaeta

1989 ◽  
pp. 229-234
Author(s):  
C. Rex Bingham ◽  
Andrew C. Miller
Keyword(s):  
Gravel Bar

An integrated high-resolution geophysical and geologic visualization of a Lake Bonneville shoreline deposit (Utah, USA)

2019 ◽  
Vol 7 (2) ◽  
pp. T265-T282 ◽  
Author(s):  
Katelynn M. Smith ◽  
John H. McBride ◽  
Stephen T. Nelson ◽  
R. William Keach ◽  
Samuel M. Hudson ◽  
...  
Keyword(s):  
High Resolution ◽  
Late Pleistocene ◽  
Depositional Environment ◽  
Three Dimensional ◽  
Sedimentary Facies ◽  
Basin And Range ◽  
Basin And Range Province ◽  
Lake Bonneville ◽  
Depositional Processes ◽  
Gravel Bar

Pilot Valley, located in the eastern Basin and Range, Western Utah, USA, contains numerous shorelines and depositional remnants of Late Pleistocene Lake Bonneville. These remnants present excellent ground-penetrating radar (GPR) targets due to their coherent stratification, low-clay, low-salinity, and low moisture content. Three-dimensional GPR imaging can resolve fine-scale stratigraphy of these deposits down to a few centimeters, and when combined with detailed outcrop characterization, it provides an in-depth look at the architecture of these deposits. On the western side of Pilot Valley, a well-preserved late Pleistocene gravel bar records shoreline depositional processes associated with the Provo (or just post-Provo) shoreline period. GPR data, measured stratigraphic sections, cores, paleontological sampling for paleoecology and radiocarbon dating, and mineralogical analysis permit a detailed reconstruction of the depositional environment of this well-exposed prograding gravel bar. Contrary to other described Bonneville shoreline deposits, calibrated radiocarbon ages ranging from 16.5 to 14.3 (ka, BP) indicate that the bar was stable and active during an overall regressive stage of the lake, as it dropped from the Provo shoreline (or just post-Provo level). Our study provides a model for an ancient pluvial lakeshore depositional environment in the Basin and Range province and suggests that stable, progradational bedforms common to the various stages of Lake Bonneville are likely not all associated with periods of shoreline stability, as is commonly assumed. The high-resolution GPR visualization demonstrates the high degree of compartmentalization possible for a potential subsurface reservoir target based on ancient shoreline sedimentary facies.

Expansion of Elaeagnus umbellata on a gravel bar in the Naka River, Shikoku, Japan

2002 ◽  
Vol 17 (1) ◽  
pp. 25-36 ◽  
Author(s):  
Mari Kohri ◽  
Mahito Kamada ◽  
Toyokatsu Yuuki ◽  
Takeshi Okabe ◽  
Nobukazu Nakagoshi
Keyword(s):  
Elaeagnus Umbellata ◽  
Gravel Bar
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