groundwater

when will a perched water table develop

When a horizontal aquitard above the regional water table lies below an aquifer

which of the following describes an aquifer

a saturated, porous, and permeable layer or stratum

which of the following describes an artesian well

a well in which water rises above the top of the aquifer without any pumping

which of the following describes a disappearing sinking creek

an influent stream in the karst area

Which of the following statements concerning unconfined aquifers on barrier islands and atolls is correct?

any salt water in the aquifer will rise if the water table is lowered by pumping

what is the common rock forming mineral or mineral group is most readily dissolved by groundwater

calcite

which of the following describes the configuration of an unconfined water table around a pumping well

cone of depression

what is the relationship between the cone of depression associated with a pumping well?

drawdown is the distance between the original water table and the water level well

How would hazardous substances such as gasoline, kerosene, ethyl alcohol, pesticides, and acids that accidentally entered a groundwater system behave?

gasoline and kerosene would float on the water table; ethyl alcohol would disable and disperse in the groundwater

which of the following is NOT a speleothem

geyserite

what reservoir contains the next highest percentage of earth freshwater after ice sheets and glaciers

groundwater

name two characteristics in all aquifers

high porosity and high permeability

which of the following statements defines the aerated or vadoze zone

lies above the water table

the hot spring deposits of yellowstone nation park are travertine. what rock probablylies somewhere beneath the hot springs

limestone

what characteristic of rocks and or soil controls the ease of groundwater transmission

permeability

what term describes the volume of voids or open spaces in a rock or unconsolidated material

porosity

what force pushes groundwater from pore to pore below the water table

pressure gradient and hydraulic gradient

Which of the following materials would have the best capability to naturally remove sewage pollutants?

slightly clayey sand

what is the name of an icicle-like speleothem that grows down from the roof of a cavern

stalactite

which of the following are specific features of karst topography

streams flow into depressions called sinkholes and continue to flow underground

which of the following best describes the water table

the blunder between saturated rock below and unsaturated rock above

what is the unconfined water table

the boundary between the aerated, or vadose, zone and the saturated zone below

what can be a result of excessive groundwater withdrawal

the water table may drop or decline in elevation

which of the following best describes how geysers erupt

with a slight reduction in pressure, water in a saturated, natural conduit suddenly boils sending a plume of steam and hot water into the air above the vent

where are the most extensive geothermal features in the world located?

yellowstone national park