1.4 the water balance & river regimes Flashcards
1
Q
what is a water budget?
A
the balance between inputs and outputs of a long period of time - year
2
Q
what is the water budget like in summer months?
A
evapotranspiration exceeds precipitation
3
Q
what is the water budget like in winter months?
A
rainfall exceeds transpiration
4
Q
what is the field capacity?
A
the maximum amount of water the soil can hold
5
Q
what is water surplus?
A
when soils are saturated above field capacity creating surface run off
6
Q
what can occur as a result of a water surplus?
A
lash flooding
7
Q
what does a storm hydrograph show?
A
the effects of an individual storm
8
Q
what is lag time?
A
9
Q
what do sustainable drainage system do?
A
reduce runoff from rainfall
10
Q
what are some examples of sustainable drainage systems?
A
permeable pavements
drain filters
wetlands
