Different types of sand dunes [PDF]

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.1/2. Page 2. 1 km. 200 m. 1 km. 1
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Different types of sand dunes

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.1/2

200 m

1 km

1 km 1 km

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.2/2

Low wind speed ⇐⇒ high τmin -value

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.19/38

100 metres

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.20/38

1000 metres

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.21/38

500 metres

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.22/38

Transverse dunes Thick sand layer under high wind speed conditions (low τmin-value)

Thick sand layer under low wind speed conditions (high τmin-value)

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.23/38

Transverse dunes 700 metres

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.24/38

Population of dunes Model

Barchans dunes (Morocco)

0.2 km

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.1/1

Collision of dunes 500 metres

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.1/4

50 m

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.2/4

200 m

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.3/4

300 m

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.4/4

From transverse to barchan dunes

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.1/1

Star dunes

1 km

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.1/1

200 metres

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.30/38

200 metres

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.31/38

Star dunes t1

t2

t3

t4

t5

t6

t7

t8

Dune morphology in a lattice gas cellular automaton model for sediment transport – p.37/38

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