Exam 9: Water Resources

Potential evapotranspiration (PE),when reduced by the deficit (D),yields the actual evapotranspiration value for a given time period.

An easy and fairly accurate method for estimating potential evapotranspiration for most midlatitude locations utilizes mean air temperature and daylength.

A drought defined by the degree of dryness as compared to a regional average and the duration of dryness is which of the following?

The largest known aquifer system in North America is the High Plains Aquifer (Ogallala Aquifer).

Which of the following describes about 50 percent of the 125 000 km3 of freshwater in lakes?

An erupting geyser is an example of outgassing.

The highest precipitation values in the Canada occur in the Prairie region.

Potential evapotranspiration is a measure of water demand.

Briefly describe the various surface water resources.Which resources are available in your area? Are there any large water projects in your area,such as water transfer projects or dams?

Of all the surface freshwater on Earth,over 99% is in ice and glaciers.

Under which conditions do productive aquifers exist?

The largest sector of daily water withdrawals in the water budget for Canada is presently that taken for agricultural purposes.

On a hot day,a tree can transpire hundreds of litres of water.

Precise measurements of evapotranspiration are difficult.

To what does the term "cone of depression" refer?

A confined aquifer is under the pressure of its own weight,creating a pressure level called the potentiometric surface to which water can rise on its own.

Approximately which percentage of precipitation over land infiltrates the subsurface,and,of that,which percentage returns to the atmosphere via evapotranspiration?

Which of the following is true regarding groundwater?

Which of the following is 'groundwater mining'?

The environmental effects of damming rivers for hydropower are minimal.