WMOD00315 ‎(2)‎

• Title: Colorado River Augmentation Demonstration Program - Technical Report January 1983 - March 1985
• Date: 4/1/1986
• Weather Modification - Doc Type: Report

Figure
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Table

Contents - continued
FIGURES

Page

Colorado River Augmentation Demonstration Program operational

area in western Colorado......... ........ .......... ............. ...... ... ............. ................ ..... ..........3

Production of SL W . .................. ................... .................... ...... ..... ...... ..".......... ........ ..... ......6

Distribution of liquid water observed by aircraft during along-axis
passes in west-southwesterly flow over Grand Mesa.....................................................7
Cross-axis distribution of liquid water observed in northerly flow cases
that produced local orographic clouds.........................................................................8
Cross-axis distribution of liquid water observed during northerly flow
cases with predominatly synoptic-scale cloudiness.......................................................8
Hourly averages of Ka-band cloud tops plotted against SLW..........................................9
Distribution of I-hour averages of SLW recorded by microwave
radiometer for 958 hours during November and December 1983 Clnd
January, February, and March 1985 ..........................................................................10
Flux of SL W distributed evenly over a 10-km distance downwind of

radiometer.................................................................................................................. .11

Cumulative distributions of SL W episodes and hours of SL W as a

function of episode duration...................................................................................... .12

Cumulative distributions for hourly precipitation........................................................... .16
Cumulative distributions for daily precipitation............................................................. .17
Cumulative distributions for episode duration.............................................................. ..18
Diurnal variation of precipitation amounts and frequencies ...........................................19
Hourly averages of Ka-band radar cloud tops plotted as a function of

precipitation rate........................................................................................................ .20

Liquid water measurements recorded on May 22, 1985, by the Utah
State and Bureau radiometers near Island Lake on the Grand Mesa........................32
All 2-minute average liquid water data collected by both radiometers
on May 10, 22, and 24, 1985 ....................................................................................33
Same data as shown on figure 6-2, but plotted as hourly averages ..............................34
Sensitivities of the SWR-75, C-band radar and the AN/TPQ-ll,
Ka-band radar shown as a function of range .................................."..........................36
Comparisons of various radar-determined cloud tops with cloud tops
estimated from satellite imagery.... ..... ..... ........... ................... ........ ... .................. ...... ..37
Distribution of radar-determined cloud tops.................................................................. .38

TABLES

3-1 Precipitation gauge sites, and types of gauges by season ..............................................15
3-2 Correlation statistics for three sites............................................................................... .21
6-1 SpeCifications for weather radars used in the CRADP during the
winters of 1983-84 (SWR-75) and 1984-85 (AN/TPQ-ll)..........................................35

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