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19 Cards in this Set

  • Front
  • Back
the circuit of water movement frp, the atmosphere to the earth and back to the atmosphere through various stages or processes, as precipitation, interception, run off, infiltration, percolation, storage, evaporation, and transpiration
hydrologic cycle
all of the land and water within the geograpgical confines of a drainage divide or surrounding ridges that seperate the area from neighboring watersheds
liquid to gas -->
liquid to gas --> vaporization
the combined loss of water from a given area, and during a specified peroid of time, by evaporation fromt he soil surface and by transpiration from plants
Water balance equation
Precipitation= Evapotranspiration+ Soil Storage+ Discharge
precipitation and irrigation may be picked off by plant foilage
the downward entry of water into the soil
that which is lost without entering the soil
surface runoff
lose water by percolation
pipe made of burned clay, concrete, or ceramic material, in short lengths, usually laid with open joints to collect and carry excess water from the soil
tile drains
crop residues left essentially in place on the land as a surface cover before and during the preperation of the seed bed and at least partly during the growing of a succeeding crop
stubble mulch
any tillage sequence that reduces loss of soil or water relative to conventional tillage
conservation tillage
cropland left idle in order to restore productivity, mainly through accumulation of nutrients, water, and/or organic matter
a device for measuring percolation (leaching) and evapotranspiration losses from a column of soil under controlled conditoins.
unsaturated zone above the water table
vadose zone
water within the saturated zone
ground water
the uppermost layer of an arable soil to the depth of primary tillage
a zone in the soil just above the plane of zero water pressure that remains saturated or almost saturated with water
capillary fringe