WRIR 01-4195:
Ground-Water Discharge Determined from Estimates of Evapotranspiration, Death Valley Regional Flow System, Nevada and
California
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Table 11. Values of coefficient of variability (CV) used in Monte Carlo analysis to simulate ground-water discharge: (A) evapotranspiration (ET) rate; and (B) precipitation rate
A.
|
ET Unit |
Evapotranspiration rate (feet per year) |
|||||
|---|---|---|---|---|---|---|
|
Minimum |
Maximum |
Range width |
Standard deviation1 |
Mean2 |
Coefficient of variability |
|
|
1 |
8.4 | 8.8 | 0.4 | 0.1 | 8.6 | 0.01 |
|
2 |
8.1 | 8.5 | .4 | .1 | 8.3 | .01 |
|
3 |
3.7 | 4.3 | .6 | .15 | 4.0 | .04 |
|
4 |
3.0 | 4.0 | 1.0 | .25 | 3.5 | .07 |
|
5 |
2.5 | 3.7 | 1.2 | .3 | 3.1 | .10 |
|
6 |
.6 | 2.3 | 1.7 | .425 | 1.45 | .29 |
|
7 |
2.2 | 3.0 | .8 | .2 | 2.6 | .08 |
|
8 |
.7 | 2.5 | 1.8 | .45 | 1.6 | .28 |
|
9 |
.7 | 1.8 | 1.1 | .275 | 1.25 | .22 |
|
10 |
.1 | .7 | .6 | .15 | .4 | .38 |
B.
|
Discharge area |
Precipitation rate (feet per year) |
|||||
|---|---|---|---|---|---|---|
|
Mean |
Minimum |
Maximum |
Range width |
Standard deviation1 |
Coefficient of variability |
|
|
Ash Meadows |
0.35 | 0.29 | 0.41 | 0.12 | 0.03 | 0.09 |
|
Chicago Valley |
.35 | .27 | .43 | .16 | .04 | .11 |
|
Franklin Wells area |
.35 | .29 | .41 | .12 | .03 | .09 |
|
Franklin Lake |
.33 | .26 | .41 | .16 | .04 | .11 |
|
Oasis Valley |
.5 | .42 | .58 | .16 | .04 | .08 |
|
Sarcobatus Flat |
.5 | .33 | .67 | .34 | .085 | .17 |
|
Shoshone area |
.29 | .21 | .37 | .16 | .04 | .14 |
|
Stewart Valley |
.35 | .27 | .43 | .16 | .04 | .11 |
|
Tecopa/California Valley area |
.29 | .21 | .37 | .16 | .04 | .14 |
1 Standard deviation assumes that the range represents 95 percent of the
sample population.
2 Mean used in analysis is the value given for input parameter in tables 5 and 7.