1

MIKE Flood

An integrated tool for flood plain andstorm surge studies

MIKE Flood combines MIKE 11 MIKE 21

2

MIKE Flood

MIKE Flood is used

If a two-dimensional (MIKE21) description is needed in some areas and where significant benefits exist when combined to a one-dimensional (MIKE11) model

3

MIKE Flood

Examples :A detailed velocity pattern is required locally (MIKE21) but exchange of flows with the river is regulated by complex structures (movable gates, culverts, special weirs etc.) simulated in a MIKE11 model

A general MIKE11 model for multiple purpose (eg. flow analysis, water quality, sediment transport, flood forecasting) can provide boundary condition to a local two-dimensional area (and vice-versa)

4

Coupling of MIKE 11 and MIKE 21 advection-dispersion hydrodynamics

MIKE FLOOD

2-D Model of two-dimensional flow1-D Model of one-dimensional flow

5

MIKE 11 boundary to a MIKE 21 boundary

Types of coupling

Lake, estuary etc.

MIKE 11 boundary to a MIKE 21 source point

Flood plain

6

Different Time step in MIKE11 and MIKE21

Time Integration

Mike 21 Mike 11

n

n+1

Data exchange at mike11 time step n and n+1 MIKE11 always ahead: MIKE21 value at time step n applied as boundary condition at time step n+1 to

progress MIKE11 with the next time step. Following the MIKE11 time step, the MIKE21 executes (smaller) time steps up to new n+1.