EARTH SCIENCE
GROUNDWATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Examine the hills and slope of the ground around the school, and place the rain garden at the bottom of the hills where rain collects.
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Set up several rain gauges in the field around the school, and place the rain garden where the most rain falls.
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Collect soil samples from around the school, and place the rain garden in the location where the soil has the most rocks.
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Map out the locations of plant life around the school, and place the rain garden away from other plants.
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Detailed explanation-1: -What procedure should the class use to select the best location for the rain garden? Examine the hills and slope of the ground around the school, and place the rain garden at the bottom of the hills where rain collects.
Detailed explanation-2: -The aeration and saturation zones (Fig. 11.2) are defined by the status of their pore space. In the saturated zone, water completely fills all pore space over an indefinitely long period of time; this water constitutes the groundwater.
Detailed explanation-3: -Topography and geology are the dominant factors controlling groundwater flow. Storativity describes the property of an aquifer to store water. Hydraulic conductivity is measured by performing a pumping test, i.e. by pumping one well and observing the changes in hydraulic head in neighboring wells.
Detailed explanation-4: -Fluctuations in the water table level are caused by changes in precipitation between seasons and years. During late winter and spring, when snow melts and precipitation is high, the water table rises.
Detailed explanation-5: -Stressors that can deplete aquifers include changes in precipitation and snowmelt patterns; withdrawal of ground water for drinking, irrigation, and other human uses; and impervious paved surfaces that prevent precipitation from recharging ground water. Some deep aquifers may take thousands of years to replenish.