water balance Flashcards
what is the water balance?
within a drainage basin, it is the balance between inputs and outputs
where does the water balance occur?
within a drainage basin
when do rivers only occur/
if the stores are able to release water, there is direct precipitation or there is overland flow
how are larger rivers fed?
by smaller tributary streams
what is the river regime?
discharge levels rise and fall showing an annual pattern
what is the annual pattern in which discharge levels rise and fall?
rivers regime
what formulation can be used to show the water balance?
precipitation = discharge + evapotranspiration
+/- changes in storage
what is evapotranspiration closely related to?
prevailing temperature
what is potential evapotranspiration?
the amount of water that could be evaporated or transpired from an area if there was sufficient water available
if all soil has been filled water is in what?
surplus
who is deficit of water caused?
evapotranspiration is higher than precipitation
what is recharge?
when precipitation is greater than evapotranspiration
why do soil moisture graphs vary?
depending on climate
