Defining a Sustainable Sand Budget for Burrow-pit Activities in Nigeria

2015 ◽  
Vol 3 (5) ◽  
pp. 169-177
Author(s):  
I. O. Oladipo ◽  
Keyword(s):  
Sand Budget

scholarly journals Topset-to-forest rollover trajectories as reliable predictors of sediment-volume partitioning into deep-lake areas

2021 ◽  
Author(s):  
Xian-Zheng Zhao ◽  
Cheng-Lin Gong ◽  
Li-Hong Zhou ◽  
Dong-Wei Li ◽  
Xiu-Gang Pu ◽  
...  
Keyword(s):  
Bohai Bay ◽  
Deep Lake ◽  
Bohai Bay Basin ◽  
Widespread Occurrence ◽  
Sediment Volume ◽  
Terrestrial Sediments ◽  
Qikou Sag ◽  
Sand Budget ◽  
Stacking Patterns

AbstractTopset-to-forest rollover trajectories and their relation to sediment- and sand-budget partitioning into deep-lake areas are far from being well understood, as compared with their marine counterparts of shelf edges. Two quantitatively distinctive topset-to-forest rollover trajectories and clinothem-stacking patterns were recognized in the Oligocene Qikou Sag of the Bohai Bay Basin and are quantified in terms of trajectory angles (Tse), topset thickness (Tt), forest thickness (Tf), bottomset thickness (Tb), and clinothem-set relief (Rc). Rising topset-to-forest trajectories have positive Tse of 0.15°–0.51° (averaging 0.35°). Ranges in Tt, Tf, Tb, and Rc of their associated progradational and aggradational clinothem sets are, respectively, 32.4–58.7 m (averaging 42.7 m), 76.9–176.2 m (averaging 148.3 m), 0 m, and 167.8–320.8 m (averaging 272.9 m). Falling topset-to-forest rollover trajectories, in contrast, have negative Tse of − 0.12° to − 0.02° (averaging − 0.06°). Ranges in Tt, Tf, Tb, and Rc of their associated progradational and downstepping clinothem sets are, respectively, 0 m, 266.0–395.7 m (averaging 333.4 m), 441.1–542.5 m (averaging 464.1), and 874.9–922.6 m (averaging 892.5 m). These two topset-to-forest rollover trajectories and clinothem-stacking patterns are closely linked to two distinctive patterns of sediment- and sand-volume partitioning into deep-lake areas, which are quantified in terms of Tt, Tb, and differential sediment aggradation of topset segments and forest-to-bottomset compartments (As/Ad). Rising topset-to-forest rollover trajectories and associated progradational and aggradational clinothem sets are characterized by aggradational topsets (reported as Tt of 32.4–58.7 m), a lack of time-equivalent bottomsets, and As/Ad of 0.22–0.87 (averaging 0.33), and are fronted by mud-dominated depositional deposits, with sporadic occurrence of thinner and regionally localized forest sands. They are, therefore, inefficient at delivering terrestrial sediments or sands into deep-lake settings. Falling topset-to-forest rollover trajectories and associated progradational and downstepping clinothem sets, in contrast, are characterized by toplap, erosional terminations but aggradational bottomsets (reported as Tb of 266.0–473.4 m), and As/Ad of 0, and are fronted by sand-rich depositional deposits, with widespread occurrence of thicker and regionally extensive time-equivalent deep-lake bottomset sands. They are, thus, efficient at delivering terrestrial sediments or sands into deep-lake settings. Topset-to-forest rollover trajectories and associated clinothem-stacking patterns are thus reliable predictors of sediment- and sand-volume partitioning into deep-lake areas, assisting greatly in developing a more dynamic stratigraphy.

Provenance and sand budget of the arid frontier of Rajasthan, India

1993 ◽  
Vol 25 (1) ◽  
pp. 71-81 ◽  
Author(s):  
Iqbaluddin ◽  
M. Ahmad ◽  
S.A. Khan
Keyword(s):  
Sand Budget

Biogeomorphic development of foredune trough blowouts quantified from medium-resolution satellite imagery

2021 ◽  
Author(s):  
Gerben Ruessink ◽  
Niels van Kuik ◽  
Job de Vries ◽  
Christian Schwarz
Keyword(s):  
Surface Area ◽  
Time Scales ◽  
Google Earth ◽  
Coastal Dune ◽  
Strong Wind ◽  
Medium Resolution ◽  
Coastal Resilience ◽  
Spatio Temporal ◽  
Padre Island ◽  
Sand Budget

<p>Foredune trough blowouts are wind-eroded trough-shaped hollows in the most seaward coastal dune with their adjoining depositional lobes. They evolve on time scales ranging from strong wind events, seasons to multiple decades due to biogeomorphic interactions. Trough blowouts play an essential role in the sand budget of many coastal dune systems by connecting the beach with the backdune. There, the deposited sand can lead to vegetation rejuvenation and an overall larger floral diversity. In Northwestern Europe, nature and coastal managers have started to experiment with constructing trough blowouts in the hope that a positive sand budget beyond the foredune in concert with enlarged biodiversity improves coastal resilience in times of climate change. The spatio-temporal evolution of trough blowouts and the factors driving this evolution are not well understood, despite their common natural occurrence and construction for nature-based management.</p><p>The aim of this contribution is to quantify the spatio-temporal development of selected trough-blowout systems around the globe utilizing cloud-free medium-resolution Landsat and Sentinel-2 spectral imagery available in the Google Earth Engine platform. Linear spectral unmixing was applied on a single image basis to extract blowout surface area over time at one man-made blowout system (Zuid-Kennemerland, Netherlands) and two natural systems (Haurvig, Denmark; Padre Island, Texas, USA), assigning pixels with a fractional vegetation cover less than 50% to the blowout. At Zuid-Kennemerland and Haurvig, the blowout surface area fluctuated predominantly on seasonal time scales, with the smallest and largest values in late summer/early autumn and late winter/early spring, respectively. This seasonal variability reflects plant phenology in combination with increased sand accumulation in winter because of the more energetic wind conditions. In summer, vegetation regrew mainly at the edges of the depositional lobes and on the foredune between individual blowouts. The blowout surface area at the subtropical Padre Island varied predominantly on a multi-annual time scale. Most notably, multi-annual area decay was observed when a blowout progressed inland and lost its open connection to the beach, likely resulting in less physical disturbance and hence a dominance of ecological processes. In future work, we will combine our results with auxiliary information (e.g., multitemporal digital elevation models, time series of external forcing conditions, plant species and traits) to develop and test an eco-geomorphological model for blowout evolution. Such a model is adamant to understand what factors contribute to the success or failure of dune restoration projects involving blowouts as nature-based solutions to increase coastal resilience.</p>

scholarly journals Sand Budget Analysis Considering Changes in Grain Size-an Example of Shonan Coast

2008 ◽  
Vol 55 ◽  
pp. 726-730
Author(s):  
Takaaki UDA ◽  
Genji AOSHIMA ◽  
Tsuyoshi SAMEJIMA ◽  
Atsushi YOSHIOKA ◽  
Toshiro SAN-NAMI ◽  
...  
Keyword(s):  
Grain Size ◽  
Budget Analysis ◽  
Sand Budget

scholarly journals Sand budget for Capitola Beach, California.

1971 ◽  
Author(s):  
Richard Glenn. Anderson
Keyword(s):  
Sand Budget

scholarly journals Holocene Coastal Zone Sand Budget, South Shore, Nova Scotia

1980 ◽  
Author(s):  
D J W Piper
Keyword(s):  
Nova Scotia ◽  
Coastal Zone ◽  
South Shore ◽  
Sand Budget

Lower Columbia River Sand Supply and Removal: Estimates of Two Sand Budget Components

2013 ◽  
Vol 139 (5) ◽  
pp. 383-392 ◽  
Author(s):  
William J. Templeton ◽  
David A. Jay
Keyword(s):  
Columbia River ◽  
River Sand ◽  
Sand Supply ◽  
Sand Budget

The late Holocene coastal dunefield at Vejers, Denmark: characteristics, sand budget and depositional dynamics

Geomorphology ◽  
1996 ◽  
Vol 17 (1-3) ◽  
pp. 79-98 ◽  
Author(s):  
Lars B. Clemmensen ◽  
Frank Andreasen ◽  
Søren T. Nielsen ◽  
Erik Sten
Keyword(s):  
Late Holocene ◽  
Sand Budget
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