26. The water table is defined as: A. The column of the water in a lake B. The b

Question

26. The water table is defined as: A. The column of the water in a lake B. The bound C. An impermeable layer of rock D. The region where groundwater intersects stream water ary that separates the saturated and unsaturated zone underground 27. What is land subsidence? A. An increase in the depth of wells needed to reach the water table B. An aggregation of pollutants to toxic levels C. A gravity-induced compaction of the land surface enabled by lower water pressure D. A decrease in the discharge of nearby running water well In the groundwater transport lab the dye was introduced through a/an A. confined B. Injection C. Monitoring D. Artesian into a 29. If a pollutant enters the groundwater at a depth of 15 feet and a week later flows y s water supply approximately 2 miles away at a depth of 750 feet, what is the velocity of the flow? cit A. 762 ft/day B. 1508 ft/day C. 1512ft/day D. 0.5 ft/day 30. What is a leachate? A. Salt water in a landfill B. The sand in a landfill. C. The liquids that accumulate in a landfill that pools at the liner D. Solid materials that crystallize in a landfill. 31. Streams that terminate abruptly by seeping into the ground are called: A. Sinkholes B. Springs C. Disappearing streams D. Solution Valleys

Explanation / Answer

26) b. the boundary that separates the saturated zone and the unsaturated zone.

Explanation : Below the water table water is present so it is saturated zone and above the water table no water is present in the pores. It is called unsaturated zone. Hence water table stands as a boundary between saturated and unsaturated zone.

27) c. A gravity induced compaction of the land surface enabled by the lower water pressure.

Explanation : When the ground water is over withdrawn from underground then the rocks inside the ground undergo compaction due to this the land surface will become like wave from instead of straight line. The ground surface will sink due to this and the buildings on the land surface will damage due to this. The Mexico city is facing the same problem.

28) b. Injection wells.

30) c. the liquids that accumulate in a landfill that pools at the liner. leachate is a liquid that passing through matter extracts soluble or suspended solids of a material that passing through.

31) a) sink holes. Sink holes are formed as the surface water suddenly terminate seeping into the ground.

Explanation : springs are formed when the water flows from the aquifer to the surface.

disappearing streams are formed due to the disappearing of the stream suddenly due to the percolation of the water into the underground.

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