CE 374K Hydrology,
Spring 2004 Precipitation
3.2.1 (Problem on atmospheric water)
3.3.2 (Problem on Precipitation, terminal velocity)
3.4.3 (Problem on Precipitation, rainfall hyetograph)
3.4.7 (Problem on Precipitation, spatial interpolation)
Additional reading for Precipitation: Sections 3.4, 3.5, 3.6, and 3.7 from Handbook of Hydrology.
Precipitation on the web:
Animated precipitation map for the
http://weather.noaa.gov/radar/mosaic.loop/DS.p19r0/ar.us.conus.shtml
Animated rainfall
and Snowfall map for the
Global
monthly precipitation (mm/month) based on satellite precipitation
estimates over ocean areas and rain gage data over land regions.
http://ingrid.ldeo.columbia.edu/maproom/.Global/.Climatologies/Precip_Loop.html
CE 374K Hydrology, Spring 2004
Spatial Interpolation Methods:
This information is
in addition to what you have in the textbook.
Thiessen Polygon Applet on the web:
http://www.cs.cornell.edu/Info/People/chew/Delaunay.html
Where is the estimate at any required location, Pi
is the measured/observed value at the ith
location, di is the distance between , and N is the total number of measured points that
are included in the interpolation process. This particular formula is called
Squared Inverse Distance Weighting because di
is raised by a power of two. The power could be any value, but two is commonly
used.
There are more methods for
interpolation, such as Splines and Kriging, but these methods are beyond the scope of this
class. If you need more information on these methods, please write an email to
me (vmmerwade@mail.utexas.edu).
Extra Credit!
In problem 3.4.7, find an
interpolated precipitation value for a point A (6, 7) using the squared
inverse distance weighting method.