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Gravity
Terms in this set (33)
streamflow is one of the ( ) and ( ) measurements we make in hydrology
easiest, most certain
most the worlds freshwater is in
glaciers and permanent snow cover
the ( ) distribution requires an estimate of the skewness
pearson type III
which of the following is not one of the 7 steps for processing a digital elevation
cloud computing
( ) provide a means to estimate the uncertainty in the mean and standard deviation used in frequency analysis and is based on ( )
confidence limits, the sample size
a ( ) is defined as the area that uniquely drains into the stream segment
catchment
( ) provide a graphical summary of the frequency analysis
frequency plots
What method estimates precipitation at a point under the assumption that precipitation at an ungauged point is more influenced by nearby measurements?
inverse distance weighting
The rate of energy emission per unit surface area is given by the _________.
stefan boltzmann law
what method for estimating precipitation over an area assumes continuous contours of precipitation across the area?
isohyetal
to estimate precipitation over a watershed, the ____ method equally weights all precipitation across the area
arithmetic mean
Events A and B are said to be ______________ if the occurrence of one event does not affect the probability that the other occurs.
independent
_____ is the fraction of precipitation that exists a watershed as streamflow
runoff ratio
increasing the elevation to the pour point for grid cells completely surrounded by higher terrain is called ______
pit filling
if the volume of a reservoir increases by a factor of 2 and the outflow increases by a factor of 4 the residence time ______
decreases by half
_____ is used to measure precipitation over an area
satellite remote sensing
what method for estimating precipitation over an area assumes that any point in the watershed receives the same amount of rainfall as the nearest gauge?
arithmetic mean
a ______ defines a relationship between stage and discharge
rating curve
______ are formulas to estimate the probability of an event from data empirically
plotting positions
instantaneous streamflow measurements use _____ ____ to calculate streamflow
velocity, area
______ are a graphical tool for assessing whether or not the data fits particular distribution
q-q plots
continuous streamflow measurements are made by directly measuring the ______
water level
_____ is a deductive discipline relying on preexisting information
probability
______ is used to measure evaportation
eddy co-variance
If the storage decreases and the flow rate increases, how does the residence time change?
decreases
a stream network is defined by using a _____ based on flow accumulation or grid order
threshold
what is the main water input for most watersheds?
precipitation
when processing a DEM the flow direction is determined by the _____
hydrologic slope
the global precipitation measurement project aims to provide observations of rain and snow worldwide using _____
satellites
The probability of a number of independent and mutually exclusive events is the ____________ of the probabilities.
sum
______ are a function of return period and when used wit the mean and standard deviation provide a means of utilizing any distribution
frequency factors
The runoff ratio changes based on _____________.
soil moisture
which of the following is not a limitation to the classic defintion of probability based on frequency given by p(a) = k/n?
n must equal one
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