Sand Dune Cross Section
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To compare their relationships for different fences two dimensionless terms a h2 and h h are proposed.
Sand dune cross section. Dunes occur in different shapes and sizes formed by interaction with the flow of air or water. Sand dune profile maker. If the regional rate of sand flow can be calculated from measurements of wind speed and direction and if it is assumed that the dune has a simple cross section that migrates forward without change of form a formula for the rate of movement of a dune that agrees with actual measurements can be derived.
Aeolian transverse and barchan dune types have an idealized cross section as shown in figure 1 below with a slipface on their lee downwind side. Use your cumulative width and slope angle data to quickly create a beach profile and calculate the beach cross sectional area and volume. The acute angle of the slipface with respect to horizontal as measured in a vertical plane normal to the slipface is the dip.
Sand dune cross beds can be large such as in the jurassic age erg deposits of the navajo sandstone in canyonlands national park. Above the dune field is a cross sectional profile unequal horizontal and vertical scales of the top of the dune field at the triangular marker. Enter your transect cumulative distance and slope angle data in the calculator below.
Enter your sand dune transect data to quickly create a dune profile. Sand dune any accumulation of sand grains shaped into a mound or ridge by the wind under the influence of gravity sand dunes are comparable to other forms that appear when a fluid moves over a loose bed such as subaqueous dunes on the beds of rivers and tidal estuaries and sand waves on the continental shelves beneath shallow seas. Dune systems occur all around scotland s coast but are less common on the mainland between glasgow and kyle of.
In physical geography a dune is a hill of loose sand built by aeolian processes wind or the flow of water. Save an image of your profile and print the data used to construct and analyse it. Download an image of your profile and print the data calculations used to construct it.
The scales of both the dune field and the cross section were set to auto adjust to current conditions so they change as the field evolves. Scotland has more than 50 000 hectares of sand dunes 71 of great britain s coastal sand resource. Most machair systems are fronted by sand dunes.
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