Term
| Where in North America does most precipitation occur? |
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Definition
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Term
| where in North America does the least amount of precipitation? |
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Definition
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Term
| most run off of ground water occurs in what form? |
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Definition
| Overland flow and streamflow |
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Term
| groundwater only accounts for how many percent of runoff? |
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Definition
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Term
| Overland flow and streamflow account for x% of runoff? |
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Definition
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Term
| net movement of water molecules away from a wet surface into air that is less saturated? |
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Definition
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Term
| outward movement of water through small openings on the underside of leaves? |
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Definition
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Term
| the combination of transpiration and evaporation is called? |
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Definition
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Term
| the net outward movement of water molecules away from land plants is called? |
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Definition
| Actual evapotranspiration |
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Term
| water that would evaporate and transpired under optimum moisture conditions when enough water is available is called? |
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Definition
| Potential evapotranspiration |
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Term
| what are the two ways to measure potential evaporation? |
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Definition
| Evaporation pan and lysimeter |
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Term
| how does a lysimeter work? |
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Definition
| half open can buried in earth |
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Term
| why does high potential evapotranspiration lead to high transpiration? |
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Definition
| Water evaporated water in air leads to more rain |
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Term
| why does a low potential evapotranspiration lead to lower precipitation? |
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Definition
| Low amount of water in air leads to less rain |
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Term
| thin molecular layer of water tightly bound to sign Oracle is not available what should Americans? |
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Definition
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Term
| water held in soil surface tension of hydrogen bonding, accessible to plant roots? |
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Definition
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Term
| water that remains near plants after water drains from larger pore spaces? |
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Definition
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Term
| excess water that percolates downward from the shallow capillary zone to the deeper groundwater zone? |
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Definition
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Term
| one title soil mixture maximizes available water is the best for plants? |
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Definition
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Term
| what city has the greatest drought in the figures based on book? |
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Definition
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Term
| lower precipitation, higher temperatures and reductions on moisture is what kind of drought? |
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Definition
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Term
| changes in soil moisture and whether they affect crop yields is what kind of drought? |
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Definition
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Term
| reservoir levels drop, streamflow decreases and groundwater mining increases what kind of drought? |
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Definition
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Term
| water rationing, wildfires, and other problems affecting the economy and society as a drought? |
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Definition
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Term
| where is groundwater found? |
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Definition
| In the pores of soil and sediment and narrow fractures and drop |
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Term
| what is the largest reservoir of fresh water available to humans? |
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Definition
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Term
| groundwater supplies what percentage and urban and rural areas? |
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Definition
| Up to 50% of the US use groundwater, in rural areas it can be as much is 100% |
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Term
| the percentage of open space within a given volume of regular rock is called? |
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Definition
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Term
| what is the porosity of most rocks (percentage)? |
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Definition
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Term
| how high can the porosity of rocks yet (percentage)? |
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Definition
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Term
| a measure of how easily a rock allows fluid to pass through it is called? |
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Definition
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Term
| what is the most permeable and porous rock? |
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Definition
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Term
| what is the least porous and least permeable rock? |
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Definition
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Term
| what does the groundwater table during the dry season after heavy rain falls? |
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Definition
| Lowers during dry seasons, rises after heavy rain |
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Term
| what happens to groundwater in areas where precipitation seeps downward to the saturation soil? |
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Definition
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Term
| the permeability of material, travel distance and path of flow affect water in what way? |
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Definition
| Differs the amount of time it takes for water to move the ground to the charge and discharge |
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Term
| body of rocks such as shell that does not conduct water in usable amounts is called? |
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Definition
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Term
| highly permeable rock such as sandstone or porous limestone within the zone of saturation is called? |
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Definition
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Term
| what is an unconfined aquifer? |
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Definition
| Is not bound by acquiludes |
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Term
| what is a confined aquifer? |
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Definition
| Mounted above and below by aquicludes |
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Term
| the way that an overlying column of water would exert at a particular depth is called? |
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Definition
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Term
| what happens to water when it comes under increased hydrostatic pressure? |
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Definition
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Term
| when groundwater under pressure rises above the level of an aquifer this is called? |
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Definition
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Term
| what does water do to artesian well? |
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Definition
| Water rises on its own without bumping |
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Term
| what are the two conditions necessary for artesian system? |
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Definition
| Aquifer confined above and below by aquicludes and is inclined with one and receiving water (recharge area) |
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Term
| describe a non-flowing artesian well? |
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Definition
| Pressure surface below ground and water does not reach surface |
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Term
| describe a flowing artesian well? |
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Definition
| When pressure surface is aboveground |
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Term
| what is the water supply to the United States come from? |
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Definition
| Surface and groundwater sources |
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Term
| what is the overall level of water drop the High Plains aquifer? |
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Definition
| 3 to 60 m (10 to 200 feet) |
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