C150094 Red Mesa Ward Hydrology Study

• Contract/PO #: C150094
• Contractor Name: La Plata Water Conservancy District
• Contract Type: Grant
• County: La Plata
• Loan Projects - Doc Type: Report

rii--
118
t,
130 I
♦ ___ .140 r---' ,� i
I
_1-_-- __-Cr ..lc-, 4 ____;
1150 �, ' -- � ` �—`
`I ��
• 140 �`
V. ± .1 \
(\..� 1 1
Le. -1 I �, .1 U2 127
L63 171 1.10 I �J ' 1.34 f
. • , \3
l.ea
Or_i
1.85 �`© • 152 UO.� , LA7 '' `
•
'0 129
V I�9 I)7
A.29 i1fU7 lk#1 �1.
• i
I. •
35• - N'. \
_; 115
V. Ib0 U6 i V S 4 I
1 I
i
L8D 140 126
DISTANCE SCALE VO U6 I
uo
100 2p0 300 IMO I .
• , s
r , , I u0 7•
100 200 ]00 .00 500 IK MI • 109• 1�
• • 111QAVE11AG( OE <3 STATIONS
]1 12]• 121• 119• 1 17• 11 S 11 • NO DATA
• Figure 4. 7.--Analysis of 6/1-hr ratios of averaged maximum station
data (plotted at midpoints of a 2° latitude-longitude grid)•
establish the basic depth-duration curve, then structure a variable set of
depth-duration curves to cover the range of 6/1-hr ratios that are needed.
Three sets of data were considered for obtaining a base relation (see
table 4.3 for depth-duration data) . •
a. An average of depth-duration relations from each of 17 greatest 3-hr
rains from summer storms (1940-49) in Utah (U. S. Weather. Bureau 1951b) and
in unpublished tabulations for Nevada and Arizona (1940-63). The 3-hr
amounts ranged from 1 to 3 inches (25 to 76 mm) in these events.
b. An average depth-duration relation from 14 -of the most extreme short
duration storms listed in Storm Rainfall (U. S. Army, Corps
1945- ) . These storms come from- Eastern and Central States and have 3-hr
h amounts of 5 to 22 inches (127 .to 559 mm).
•