Water source yields and the hydrological cycle

Question 1

What are the 4 main considerations for water quantity?

Answer 1

How many troops?

How long is the stay?

How will the source recharge?

How quickly will the source recharge?

Question 2

Demand on a water source is known as?

Answer 2

Demand placed on the water source is known as the depletion rate

Question 3

The speed with which the water source recharges is known as?

Answer 3

The speed with which the water source recharges is known as recuperation rate

Question 4

what 3 pieces of equipment are required to calculate water velocity?

Answer 4

Tape measure
Stop-watch
Floating object e.g. a stick

Question 5

What could cause errors in yield calculations as

All things being equal they are reasonably accurate, within +/- 5%

All things not being equal they can be up to +/- 20% out.

Answer 5

Recent period of either drought or heavy rainfall may affect continuity of estimated yield

Variations in depth caused by sub-bed geology

Unpredictable anomalies in profile of water course channel e.g. submerged rocks, silt depositions, etc.
Uneven erosion and/or deposition skewing cross sectional area

Effects of weather on height of water table

Speeds of infiltration, percolation and run-off due to nature of land topography and soil saturation zones

Unpredictability of recharge feed rates.