Investigation of sediment accumulation in Berdan Dam Reservoir using bathymetric measurements and Sentinel-2 Data

With the warming of the climate and the resumption of the Northern Sea Route, studies of the dynamics of the northern deltas, that close the exit to the ocean, have intensified. The best way to detect changes is to compare images, obtained at the end of the last century from the Landsat/ETM satellite (resolution R = 30 m) and modern Sentinel-2/MSI images (R = 10 m). To identify the effect of differences in the resolution of the compared images on the accuracy of determining changes in the coastline, a graphical simulation of reproducing changes (areas of coastal erosion or sediment accumulation) at the pixel level was performed. Reproduction of changes had been simulated for coastlines, that coincide in the direction of the pixel grid lines and deviate from them at angles of 15°, 30°, 45°, when the coastline is shifted from 10 to 40 m. It has been revealed that it is possible to determine the displacement of the coastline starting from the value of 20 m from multitemporal images with a resolution of 30 and 10 m. For coastlines directed along the pixel grid lines, it is possible to downplay (or exaggerate) the washout (or accumulation) band by 1/2 RL + 1/2 LS = 20 m. Coastlines that are tilted to the pixel grid may show false changes, especially if the shoreline position is unchanged or the offset is small (10 m). The kind of the distortion strongly depends on the position of the real coastline within the large Landsat pixels. The greatest distortions are characteristic of coastlines that occupy a peripheral position in the cells of the pixel grid. The simulation results should be used when preparing palettes to determine changes from combined multi-temporal images.

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Comparison between Svm and MLC to Map the Land Cover Using Sentinel 2 Data In Babel Governorate – Iraq

10.33329/aus.2019.n26.4.23 ◽

2019 ◽

Vol 26 (4) ◽

pp. 168-174

Keyword(s):

Land Cover ◽

Sentinel 2

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Effects of algal turfs and sediment accumulation on replenishment and primary productivity of fucoid assemblages

Marine Ecology Progress Series ◽

10.3354/meps10932 ◽

2014 ◽

Vol 511 ◽

pp. 59-70 ◽

Cited By ~ 18

Author(s):

T Alestra ◽

LW Tait ◽

DR Schiel

Keyword(s):

Primary Productivity ◽

Sediment Accumulation ◽

Algal Turfs

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Evaluating the potential effects of hurricanes on long-term sediment accumulation in two micro-tidal sub-estuaries: Barnegat Bay and Little Egg Harbor, New Jersey, U.S.A.

Data Series ◽

10.3133/ds993 ◽

2016 ◽

Cited By ~ 1

Author(s):

Marci E. Marot ◽

Christopher G. Smith ◽

Alisha M. Ellis ◽

Cathryn J. Wheaton

Keyword(s):

New Jersey ◽

Sediment Accumulation ◽

Barnegat Bay

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Sediment accumulation and water volume in Loch Raven Reservoir, Baltimore County, Maryland

10.3133/wri994240 ◽

1999 ◽

Keyword(s):

Sediment Accumulation ◽

Water Volume ◽

Baltimore County

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Subsurface stratigraphy and basin-fill architecture of the late Paleozoic eastern Taos trough, northern New Mexico, U.S.A.

The Mountain Geologist ◽

10.31582/rmag.mg.57.3.149 ◽

2020 ◽

Vol 57 (3) ◽

pp. 149-176

Author(s):

Nur Uddin Md Khaled Chowdhury ◽

Dustin E. Sweet

Keyword(s):

New Mexico ◽

Sediment Accumulation ◽

Late Paleozoic ◽

North Central ◽

The North ◽

Basement Rocks ◽

Basin Geometry ◽

Deformation Event ◽

Thrust System ◽

Basin Fill

The greater Taos trough located in north-central New Mexico represents one of numerous late Paleozoic basins that formed during the Ancestral Rocky Mountains deformation event. The late Paleozoic stratigraphy and basin geometry of the eastern portion of the greater Taos trough, also called the Rainsville trough, is little known because the strata are all in the subsurface. Numerous wells drilled through the late Paleozoic strata provide a scope for investigating subsurface stratigraphy and basin-fill architecture of the Rainsville trough. Lithologic data obtained predominantly from petrophysical well logs combined with available biostratigraphic data from the greater Taos trough allows construction of a chronostratigraphic framework of the basin fill. Isopach- and structure-maps indicate that the sediment depocenter was just east of the El Oro-Rincon uplift and a westerly thickening wedge-shaped basin-fill geometry existed during the Pennsylvanian. These relationships imply that the thrust system on the east side of the Precambrian-cored El Oro-Rincon uplift was active during the Pennsylvanian and segmented the greater Taos trough into the eastern Rainsville trough and the western Taos trough. During the Permian, sediment depocenter(s) shifted more southerly and easterly and strata onlap Precambrian basement rocks of the Sierra Grande uplift to the east and Cimarron arch to the north of the Rainsville trough. Permian strata appear to demonstrate minimal influence by faults that were active during the Pennsylvanian and sediment accumulation occurred both in the basinal area as well as on previous positive-relief highlands. A general Permian decrease in eustatic sea level and cessation of local-fault-controlled subsidence indicates that regional subsidence must have affected the region in the early Permian.

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Submerged Macrophyte Control Using Plastic Blankets

Water Science & Technology ◽

10.2166/wst.1994.0172 ◽

1994 ◽

Vol 29 (4) ◽

pp. 119-126

Author(s):

D. R. Carter ◽

S. Carter ◽

J. L. Allen

Keyword(s):

Plant Species ◽

Sediment Accumulation ◽

Submerged Macrophyte ◽

Light Reduction ◽

Control Options ◽

Macrophyte Growth ◽

Gravel Pits ◽

End Use ◽

Potential Area

Penrith Lakes Scheme is concerned with the rehabilitation of gravel pits to create a system of large recreational lakes. A potential submerged macrophyte problem has been identified in an existing man-made lake. The need to control the macrophytes is dependent on the proposed end use of the lakes and the potential area of invasion. A variety of control options were assessed. Plastic blankets were tested to determine their effectiveness in controlling macrophyte growth specifically in swimming and boat access areas. Comparisons of clear, black and black woven blankets were conducted. Experiments revealed that 90% of the plants under the black and black woven blankets died within six weeks. Under clear blankets plants were reduced by between 20%-90%. Analysis showed that significant interactions occurred between sites and treatments and times, from which it can be inferred that none are independent of each other. Success in the reduction of macrophytes appears dependent on such factors as plant species, sediment accumulation and light reduction.

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Integrative Assessment of Sediment Quality History in Pulp Mill Recipient Area in Finland

Water Science & Technology ◽

10.2166/wst.1999.0705 ◽

1999 ◽

Vol 40 (11-12) ◽

pp. 139-146 ◽

Cited By ~ 2

Author(s):

Mika A. Kähkönen ◽

Mikko Liukkonen ◽

Christoph Wittmann ◽

Kimmo P. Suominen ◽

Mirja S. Salkinoja-Salonen

Keyword(s):

Vibrio Fischeri ◽

Sediment Quality ◽

Sediment Accumulation ◽

Pulp Mill ◽

Complete Recovery ◽

Heavy Metal Accumulation ◽

Atp Content ◽

Bleached Kraft Pulp ◽

Elemental Chlorine ◽

Integrative Assessment

Sediments were dated and the quality assessed by polyphasic approach in an area of Lake Saimaa, which has received waste water from bleached kraft pulp production since 1954. The chosen nonrecipient forest Lake Pyylampi was situated in the same area. The activities of the enzymes butyrate-esterase and aminopeptidase were depressed at the depth of 2 to 8 cm in the recipient but not in the forst lake sediment. In the same layers the contents of EOX-C1 and toxicity to Vibrio fischeri were very high compared to those above or below. Toxicity to microbial community in the 2 to 8 cm layer was also indicated by a gap in the ATP content and a drop in diatom species richness from the 70 species to < 50 reflecting decreased water quality of the pelagic area. All these changes dated to the period of heavy organic halogen discharges, from 1960 to late 1980s, which led to sediment accumulation of solvent soluble halogen at a depth of 2 to 8 cm, to 6.4 g m−2 (cm)−1. In the most polluted sediment layers heavy metal accumulation was too little to be related to the toxicity of these layers. Almost complete recovery of both the sediment microbial ecosystems and of the pelagic diatoms occurred after elemental chlorine was completely substituted by chlorine dioxide and biological treatment adopted for wastewaters. Butyrate-esterase and aminopeptidase, but not phosphatase, activities correlated positively with the ATP content of the sediment. Butyrate-esterase may be used as a tool to estimate microbial biomass.

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