Vannets vei i landskapet

Jannes Stolte

Vannets vei i landskapet:

Extreme weather in small catchments

new method for flood protection

the ExFlood Project

funded by: NORKLIMA (Norwegian Research Council)

Problem

15 January

16 January

Typical overland flow velocities

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

0.001 0.01 0.1 1

water dikte h (m)

V (

m/s

)

interrill rill gully

Water depth (m)

Hypothesis

Runoff during a rainstorm along wine rows (1-2 l/s)

Accumulation in fields (10-100 l/s)

Accumulation in catchment (>1000 l/s)

Accumulation downstream, 100-1000 m3/s

downstream

ExFlood Approach

Extreme Event Land use

change/management

Peak discharge

Study sites

Trondheim

Ås (test site)

Fredrikstad

Sandnes

Measures in rural areas Main focus is delay of the peak discharge

Measures in rural areas Main focus is delay of the peak discharge:

forest areas

Measures in rural areas Main focus is delay of the peak discharge:

agricultural area

Measures in rural areas

Measures in urban areas

Grønne tak

Regnbed

Grønne tak

Tyskland Sverige

Mer enn 50 %

av årsnedbør

holdes tilbake

Hva med

kaldt

klima?

Landscapearkitektur students 2011

Trondheim: Oddveig Eriksen Hovdenak

Fredrikstad: Andreas Vadum

Sandness: Katinka Kilian

Decision tool for land use planning

The ExFlood project contributes to:

- what kind of measures

- effectiveness of these measures

- land use planning process