PART 2: HYDROMETEOROLOGY Flashcards
the water cycle on the earth consisting of a continuous movement of moisture over, through, and beneath the surface
hydrologic cycle
is varied form of moisture that occur in the atmosphere
precipitation
quite uniform precipitation with drop less than 0.5mm in diameter
drizzle
water particles as large as 7mm in diameter
rain
grouping of small ice crystals (snowflakes)
snow
forms when raindrops are falling through air having a temperature below freezing
sleet
accumulating thin layer of ice
hail stone
water at the soil surface by direct condensation and absorption from the atmosphere
dew
measures the depth and intensity of rain falling on a flat surface
raingage
vertical, cylindrical container with top openings 203 mm (8in) in diameter
raingage
also known as a non-recording gage, has the same diameter at the rim as a standard non-recording rain gage
storage rain gage
allows for continuous measurements of rainfall amounts, which then can be used to determine the time duration, intensity and amount of rainfall for each storm event
recording rain gage
is used primarily for remotely measuring rainfall
tipping bucket rain gage
generally should be located on a flat area, with the opening oriented so that the rainfall is measured in terms of depth that accumulates over a flat surface
rain gage
recorded by individual rain gages in an area
arithmetic average
weighted method
thiessen method
lines of equal rainfall
isohyetal method
entry of water into the soil surface; has high initial rate that diminishes with time
infiltration
size of the particles that make-up the soil
soil factor
surface sealing is reduced by vegetation and increases infiltration
vegetation
a decay type function due to decrease in soil profile storage potential, washing of fine soil particles into the soil voids, and swelling of soil colloids and closing of soil cracks
horton equation
transfer of liquid water into the atmosphere
evaporation
process through which water vapor passes into the atmosphere through the tissues of living plants
transpiration
consumptive use of crops
evapotranspiration
recognizes the water moves away from evaporating and transpiring surface in response to turbulent gradient
mass transfer approach
total annual runoff output
water yield