Scientific Investigations Report 2006–5305

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5305

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Table 7. Estimates of average annual recharge from precipitation on western alluvial fans, compared to recharge from precipitation on Quaternary gravel and eolian sand deposits, Carson Valley, Nevada and California.

[Area, Precipitation from linear relations, and Precipitation from adjusted PRISM: Data from table 5. Estimated recharge rate: From Maurer and others (2006, p. 32). Recharge as percentage of precipitation: Annual recharge divided by annual precipitation from linear relations distribution, times 100. Estimated recharge: Estimated from recharge rate times area. Estimated ET rate: Annual precipitation from linear relations distribution minus estimated recharge divided by area. Shaded cells indicate rates used to estimate recharge. ET, evapotranspiration]

Quaternary deposits Area
(acres)		 Precipitation, in
acre-feet per year		 Estimated
recharge rate
(feet per year)		 Recharge as
percentage of
precipitation		 Estimated
recharge
(acre-feet)		 Estimated
ET rate
(feet per year)
Linear
relations		 Adjusted
PRISM
Gravel 3,100 2,500 2,900 0.04 5 120 0.8
Eolian sand 4,500 3,200 3,800 0.03 4 140 0.7
Western alluvial fans 11,000 14,300 10,400 0.04 13 440 1.3
0.03 12 330 1.3
  25 700 1.2
  24 570 1.2

1Estimated using recharge rate for Quaternary gravel and eolian sand deposits.

2Estimated using recharge as percentage of precipitation for Quaternary gravel and eolian sand deposits.

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