FLOOD01900

• County: Statewide
• Community: Nationwide
• Title: Techniques of Weather-Resources Investigations of the USGS Book 4, Chapter A1
• Date: 1/1/1968
• Floodplain - Doc Type: Educational/Technical/Reference Information

. SOME STATISTICAL TOOLS IN HYDROLOGY 25
60 32
0' 9.41
w
> 0 24
co X
w 0 "
'"
0>- 10.77 0--'
-w o::t 16
"'w ~w>-
~.... 40 4.68 l..L....Jt:j
~w ~!;;(....
0: 0
"''-' Z w
0:<< =.lwQ:g
O~ 0:>'-'
~O 4.69 0:<<
o"'~
in", 0 w,-,o
<<0 >-~
wz X bwrnO
.<< g 5.07 ~zO
>-", o.-z
~'" ~<<
"'0 ~z'"
3i= 20 5.60 OQ68
COz z",,,,
0"'>-
0.- -w
<< >-o:z
u: 9.41 Precipitation ~C!l-
>w 16
f- a Plotted point wo:
0 0
z x Point adjusted for effect
'"
0: of precipitation from
curve at right 24
0
10 20 30 0 4 8 12
WATER CONTENT OF SNOW ON APRIL 1 PRECIPITATION AT THREE CREEK
ON GOAT CREEK SNOW COURSE, IN INCHES APRil-JULY, IN INCHES

Figure 18.-Example of graphical multiple regression using arithmetic scales.

.

are given :in table 4. Curve 1 (fig. 19) is the
relation between 100-year flood (Q.oo) and
mean annual flood (Q,.33) for 17 stations.

~-t
r;;:g "A< .
~e./ ;r ':-,
".$ ---c,:?,iL-~l- "'"'
,,' :.. .o~
'" V ..0",
~... ."...
'<:?~ ./~...:
'o;P. "if'
I-- '$j 0 :Q."
./ ~~:26' 1/"/ j~.~
"~~o: 0" I.-"'~"'~ I
. ~ ~""6's "1./j. S~). '" ~
.",'0:: k') ..,,~ ''%0 ".0
~~~o~
?it" .u>
. ~ ___?''/: ~ "':7 (f
/. ~/~fi"'...
,/ '7../ ./
~~~./ ',;.
0..5':-. .~
...
.''f9

1000

f-
o
'"
o
z
<<
"'0
6~
~i:cl
z'"
-0:
"""w
~a..lOO
ct;;
~w
o~
Ou
3iii
~'"
'-'
0:
<<
w
>-
6
S

10
10

The numerator of the fraction flagged to each
plotted point is the mean annual discharge
(Q,,) of the stream. Because this discharge

""iD
~w
:;5&: 1.0 oil-
0'"
_u v~,/f-
'"
w"
n:: ~O.6 '"
~
0.6 1.0 2.0 /
DIVIDEND "
/
'-
"
/
/ .
./ .

100

~
o
'"
o
z
'"
'"
'"
o
'"
>-0
~6
.'-'
~w
><n
o
00:
1O.......~
~t;J
~~
'"
uu
~iii
0",
~u
<<
'"
z
z
<<
z
<<
w
"

100 500 10 100
MEAN ANNUAL Fb.OOD (Q2.33)' IN THOUSANDS OF CUBIC PEEl PER SECOND

500

.

Figure 19.-Graphical re9ression using hi9hly correlated independent variables. Based on data given in table 4.