A ________ is the icicle-like speleothem the grows under from the roof of a cavern. Karst tower Stalactite Stalagmite Sink hole
The water table is... A boundary in between unsaturated bedrock and also an underground river A boundary between unsaturated bedrock below and also saturated bedrock above An underground mass of partly saturated bedrock A boundary in between saturated rock below and unsaturated absent above
With a slight palliation in pressure, water in a saturated, organic conduit unexpectedly boils, sending a plume of heavy steam and hot water right into the air over the vent.

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Which that the adhering to statements ideal describes how geysers erupt? Water all of sudden cools in disconnected voids and cracks above the water table, resulting in the aquifer come explosively fragment. Water progressively percolates bottom in a network of vertical cracks over the water table; The buildup that water in the basic aquifer pushes the remainder of the water come the surface. Increasing magma in the reduced crust pushes overlying water upward v vertical fractures, bring about the water come spill the end on the surface. V a slight palliation in pressure, water in a saturated, organic conduit all of sudden boils, sending out a plume of vapor and hot water into the air above the vent.
A horizontal aquitard above the local water table avoids downward-percolating water from getting to the main aquifer. Bottom percolating water accumulates above the aquitard to type a secondary zone the saturation over the key water table.
A perched water table establishes when... The local water table is overlain by a vertical aquitard; Fish in ~ the groundwater room prevented indigenous swimming across the aquitard. A horizontal aquitard over the regional water table stays clear of downward-percolating water from getting to the key aquifer. Bottom percolating water accumulates above the aquitard to type a an additional zone of saturation above the key water table. The main aquifer below the regional water table is bounded over and listed below by aquitards. an aquitard above the regional water table get the surface, permitting birds to perch ~ above it.
Which that the following attributes are found in all good aquifers? High porosity and high permeability short permeability and high potability High porosity and also low permeability low porosity and also low permeability
What is the relationship between drawdown and the cone the depression associated with a pumping well? The drawdown is the diameter the the cone that depression measured in ~ the elevation of the initial water table. The drawdown is the percentage of easily accessible water in the aquifer the has already been used. Drawdown is the distance in between the original water table and the water level in the well. Over there is no relationship between drawdown and the cone that depression.

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Which of the following describes the alters likely to occur in one unconfined aquifer about a pumping well? Inflowing groundwater forms a saturated bulge about the fine Spiral motion of groundwater in an increase direction roughly the fine raises the water table Groundwater originally flowing in the direction of a newly-dug fine reverses direction as soon as pumping begins Cone the depression forms roughly the well
Which of the adhering to statements concerning the mapping the the water table is INCORRECT? Groundwater circulation lines parallel the water-table edge lines Groundwater operation in a downslope direction perpendicular come the water-table contour lines A landfill can contaminate wells located further downslope that the local water table in the direction of groundwater flow Water table contours space drawn based on the depth the the water table together measured in nearby wells
Contamination the wells by saltwater intrusion is frequently a trouble in _______________ Landfills Perched water tables coastal areas volcanic rocks
in locations underlain by unconsolidated or weakly consolidated strata, lowering of the water table can cause the land to subside. True False
When the well penetrates the aquifer, the groundwater reverses flow such that the water table drops in the well
Which that the following statements worrying artesian wells is not true? The well penetrates one aquifer overlain by one aquitard The well penetrates one aquifer underlain by one impermeable bed The aquifer is generally inclined, and it is saturation to one elevation above the point where the well penetrates the aquifer when the fine penetrates the aquifer, the groundwater reverses flow such the the water table fall in the well
What go the following figure best illustrate?Saltwater air pollution of groundwater along a coastal area Karst topography natural cleansing of groundwater flow through surrounding bedrock formation of geysers and also hot springs
Which the the adhering to accounts because that the largest usage of underground water in the joined States? Water for livestock and also poultry Domestic and municipal supplies commercial uses farming and irrigation
What pressure pushes groundwater native pore come pore listed below the water table? incorporated saturation advertise Capillary action Pressure gradient or hydraulic gradient Osmosis
Excessive groundwater withdrawal have the right to lead come which of the adhering to results? one influent stream becomes an effluent stream. Development of the dewatered aquifer. Porosity in the aquifer rises as the water is removed. The water table autumn or decreases in elevation.
The common, rock-forming mineral __________, i m sorry comprises the absent _______________, most readily disappear in slightly-acidic groundwater? Calcite / limestone Quartz / chert Feldspar / shale Mica / schist
An artesian well is one in which... The water is warm, relatively saline, and recharged by an wealthy stream Pressurized underground water rises from a deep, unsaturated aquifer but does no reach the surface Water rises above the top of the aquifer without any type of pumping The well is horizontal and also the water table is perched
An aquifer is... The porous and also permeable, saturated cone of depression in an aquitard A layer or stratum in i m sorry groundwater operation downward to the water table A saturated, porous, and also permeable class or stratum an unsaturated, influent-flow bed or stratum listed below a spring
Which of the adhering to rock types would have actually the largest capacity to normally remove sewage pollutants? broken granite Well-sorted, rough circuit gravel slightly clayey sand Limestone with solution channels and caverns
After ice cream sheets and glaciers, which of the adhering to reservoirs contain(s) the next highest percentage that the Earth"s freshwater? setting Lakes and rivers groundwater Oceans
Which the the following statements logically defines why parts of some cavern systems room aerated? The caves formed and later the water table climbed A nearby, downcutting stream lower the water table ~ the caves had formed. Streams formerly flowing ~ above the surface ar were diverted into the groundwater device through sinkholes, leading to the water table to climb The key water table is perched above the cavern roof, allowing air come enter
For unconfined aquifers, what hydrologic aspect is approximated by the slope of the water table? Porosity head Hydro competency Affluent decrease Hydraulic gradient
Which of the adhering to statements concerning the mapping that the water table is INCORRECT? Groundwater flow lines parallel the water-table edge lines Groundwater flows in a downslope direction perpendicular to the water-table edge lines A landfill can contaminate wells located more downslope of the regional water table in the direction the groundwater flow Water table contours room drawn based upon the depth of the water table as measured in nearby wells
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