Chapter 17- Groundwater Flashcards
280 years is the Rate of Exchange for?
Groundwater
7 years is the Rate of Exchange for?
Lakes
11.3 days is the Rate of Exchange for
Rivers
85% is the Percentage of freshwater for?
Glaciers
14% is the Percentage of freshwater for?
Groundwater
Pore spaces filled mainly with air, includes soil moisture is called
Zone of Aeration
Pore spaces completely filled with water, water within the pores is called groundwater is called
Zone of Saturation
Upper limit of zone of saturation is called?
Water table
Humid climate, groundwater moves into channel is an example of?
Effluent Stream
Arid climate, downward seepage from the stream channel to the water table is an example of
Influent stream
8,000 years is the Rate of Exchange for?
Glaciers
Proportion of void space in material, holes or cracks, expressed as percentage
Porosity
Measure of how readily fluids pass through the material, based on how well holes or cracks are connected
Permeability
High porosity + low permeability is an example of
Shale
Low porosity + low permeability is an example of?
Granite
High porosity + high permeability is an example of
Sandstone
The Permeable rocks that freely transmits groundwater (sandstone,limestone, sand, gravel) is called
Aquifer
The Impermeable layers (clay, shale, massive igneous rocks) is called
Aquiclude
The Water table that intersects earth’s surface is called
Springs
The Opening bored into the zone of saturation is called?
Wells
The Drop in water table in vicinity of well is called?
Drawdown
The Conical shaped drawdown of water table is called?
Cone of depression
The Groundwater under pressure rises above level of aquifer is called?
Artesian Well
Surface sinks, caused by heavy pumping of groundwater from sediment or drought that lowers water table are examples of?
Subsidence
Coastal areas salt groundwater pumped toward coastal wells is called
Salt Water Contamination
Septic tanks, inadequate and broken sewer lines, barnyard waste (bacteria, nitrate, and chemicals) is called?
Sewage
Filtered by sand (filtered out, destroyed by oxidation or eaten other organisms) is?
Harmful Bacteria
A harmful chemical to humans is?
Arsenic
