Mo-i-Rana - September 2002

Dam-break floods and sediment movement

1

IMPACT - WP4IMPACT - WP4

Dam-break inducedDam-break induced floodsfloodsand sediment movementand sediment movement

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

2

Debris flow : research programmeDebris flow : research programme

• Experiments : acting forces (UDT)– Uniform material

• Months 1-18

– Graded material• Months 18-32

BM UDT ?

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

3

Near-field dam break : programmeNear-field dam break : programme

• Experiments: uniform material (UCL)– Same bed levels

• Months 1-9

– Initial step in bed levels• Months 1-9

BM UCL 2

BM UCL 1

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

4

Near-field dam break : programmeNear-field dam break : programme

• Mathematical modelling (UCL)– 1D model: months 1-6

– 2D-V model: months 21-32BM UCL 3

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

5

Near-field : research programmeNear-field : research programme

• Validation of codes (UDT, UCL, Cem)– Uniform debris flow (to be clarified)

• Months 11-12

BM UDT ?

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

6

Near-field : research programmeNear-field : research programme

• Validation of codes (UDT, UCL, Cem)– 1D dam-break flow in the near field

• Months 11-12

– 2D-V dam-break flow• Months 34-35

BM UCL 2BM UCL 1

BM UCL 3

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

7

Far field : research programmeFar field : research programme

• Laboratory experiments– Dam-break in an initially prismatic valley

(UCL)• Uniform material• Graded material

• Months 13-20

BM UCL 4

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

8

Far field : research programmeFar field : research programme

• Laboratory experiments– Large-scale model (Châtelet)

• Prismatic valley• Enlargement

• Months 24-31

BM Chat

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

9

Far field : research programmeFar field : research programme

• Field experiments– Norwegian dam (SG)

• Geomorphic survey (to be checked)

• Months 9-12 and 19-21

BM Norway

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

10

Far field : research programmeFar field : research programme

• Numerical modelling– Extension of 2D-H model (UCL)

• Bank erosion

• Months 12-20 50°

37°

85°

Vbank

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

11

Far field : research programmeFar field : research programme

• Validation (UCL, UDT, Cemagref, IST)– Laboratory tests

• Prismatic valley (UCL)• Enlargement (Châtelet)

BM UCL 4 BM Chat

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

12

Far field : research programmeFar field : research programme

• Validation (UCL, UDT, Cemagref, IST)– Field tests

• WP2 Norwegian dam ?• Lake Ha!Ha!

• Months 33-35

BM Ha!Ha!

BM Norway

Mo-i-Rana - September 2002

Dam-break floods and sediment movement

13

Benchmark summaryBenchmark summary

• Near field

• Far field

BM Ha!Ha!

BM Norway

BM UCL 4

BM Chat

BM UCL 3BM UCL 2BM UCL 1

BM UDT ?