River KO 2

Dams = Concrete _______ built across a river to hold the water back.

Dams are good because you can _______ the amount of water released, preventing ________ downstream. It also stores water during the winter months, for use during the drier ______ months & can be used to make hydroelectric power.

However dams are __________ to build. Also, creating the reservoir will flood settlements upstream of the dam.

Flood Plain Zoning: The council __________ what can be built in the zones at highest risk of flooding (the flood plain) e.g. just playing fields and car parks.

Floodplain zoning is good because it reduces flood damage and ensures important services and __________, like hospitals and railway lines, are built on higher land and therefore not flooded. It is also a cheap strategy.

Washlands: Areas of the floodplain are deliberately allowed to _______.

Washlands are good because they store water during floods, reducing flood risk in settlements downstream. It is a c____ strategy and also creates w______ habitats for rare plants and animals, as well as being a place for recreation when it’s not flooded.

Planting Trees – This is a good because trees reduce the amount of water getting to the rivers by taking up water from the soil, through their roots, and __________ it back into the atmosphere during photosynthesis. Trees also slow down the flow of water by __________ it on their leaves and reducing overland flow because tree roots help water infiltrate down into the soil. Planting trees also provides economic benefits through growing wood to sell for timber.

Explain whether the following statement is True or False: Washlands are areas of the floodplain that are deliberately allowed to flood.

• True

• False

which letter represents lag time?

• a

• b

• c

• d