Scientific Investigations Report 2006–5043

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5043

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Table 5. Comparison of monthly Bowen-ratio and Lower Colorado River Accounting System evapotranspiration rates, 2002–03.

[Bowen-ratio rates in bold. Units are in feet. ET station: SC, saltcedar; MV, mixed vegetation; AW, arrowweed; station installed on December 18, 2002.Acronym: LCRAS, Lower Colorado River Accounting System; ET, evapotranspiration; ET o , reference ET. Symbol: –, data not available]

ET station and LCRAS group Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Total
2002
SC 0.59 0.63 0.58 0.46 0.22 0.05 0.04
sc_high 0.10 0.14 0.23 0.46 0.71 .91 .84 .80 .61 .34 .17 .04 5.35
MV .41 .44 .39 .25 .17 .07 .06
ms/aw .10 .14 .24 .46 .66 .80 .74 .71 .54 .35 .20 .04 4.98
sc/ms/aw .10 .14 .25 .50 .75 .96 .86 .83 .63 .35 .18 .04 5.59
AW
aw .10 .14 .22 .41 .63 .82 .76 .72 .55 .33 .19 .04 4.91
low_veg .10 .15 .24 .41 .58 .71 .66 .63 .48 .31 .20 .05 4.52
ET o .29 .43 .52 .62 .69 .83 .76 .73 .56 .39 .39 .17 6.38
2003
SC 0.04 0.05 0.12 0.26 0.51 0.62 0.50 0.52 0.42 0.36 0.09 0.04 3.53
sc_high .11 .08 .18 .41 .72 .86 .80 .72 .71 .40 .09 .04 5.12
MV .07 .08 .17 .25 .34 .40 .33 .24 .22 .17 .06 .06 2.39
ms/aw .11 .08 .20 .41 .66 .76 .71 .63 .63 .41 .10 .05 4.75
sc/ms/aw .11 .08 .20 .44 .76 .91 .85 .76 .75 .48 .11 .05 5.50
AW .04 .06 .11 .20 .37 .40 .41 .32 .18 .14 .08 .04 2.35
aw .11 .08 .17 .37 .63 .77 .72 .65 .64 .39 .09 .05 4.67
low_veg .11 .09 .19 .36 .58 .67 .63 .56 .56 .37 .10 .06 4.28
ET o .32 .25 .40 .55 .69 .78 .73 .65 .65 .47 .20 .21 5.90

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