Scientific Investigations Report 2005–5288
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2005–5288
Table 4. Cumulative chloride, time required for accumulation, and estimated recharge at soil-chloride test holes, Carson Valley, Nevada and California.
[Test hole locations are shown in figure 2. Average annual precipitation: Estimated using equation developed by Maurer and Halford (2004, p. 29); average annual precipitation, in inches, equals altitude of test hole multiplied by 0.0027 minus 5.3646. Annual rate of chloride deposition: Chloride concentrations of precipitation (0.5 mg/L) from Feth and others (1964) multiplied by average annual precipitation at test hole, in meters. Cumulative chloride content to chloride peak: From figure 11 multiplied by 10 to obtain grams per square meter. Years to accumulate: Cumulative chloride divided by annual rate of chloride deposition. Estimated annual recharge from precipitation: Calculated from equation 1 in text; recharge is equal to annual precipitation multiplied by chloride concentration of precipitation, divided by average chloride concentration of pore water below root zone. Abbreviations: ft, foot; g/m2, gram per square meter; in., inch; mg/L, milligram per liter; n, indicates no significant recharge]
| Test hole No. | Average annual precipitation (in.) | Annual rate of chloride deposition (g/m2) | Cumulative chloride content to chloride peak (g/m2) | Years to accumulate (rounded) | Cumulative chloride content to bottom of test hole (g/m2) | Years to accumulate (rounded) | Average chloride concentration in pore water below root zone (mg/L) | Estimated annual recharge rate from precipitation (ft) |
|---|---|---|---|---|---|---|---|---|
| CL-1 | 7.95 | 0.101 | 1.7 | 16 | 9.3 | 90 | 17.8 | 0.04 |
| CL-2 | 8.46 | .107 | 1.9 | 17 | 12.1 | 110 | 211.6 | .03 |
| CL-3 | 8.85 | .112 | 1,070 | 9,500 | 1,125 | 10,000 | n | n |
| CL-4 | 10.1 | .128 | 14.0 | 110 | 394 | 3,070 | n | n |
| CL-5 | 13.3 | .168 | 180 | 1,070 | 240 | 1,420 | n | n |
| CL-6 | 8.89 | .113 | 166 | 1,480 | 328 | 2,900 | n | n |
| CL-7 | 8.70 | .111 | 67 | 600 | 78 | 710 | 322.2 | .02 |
| CL-8 | 9.27 | .118 | 953 | 8,100 | 1,400 | 11,900 | n | n |
| CL-9 | 10.0 | .127 | 22 | 175 | 568 | 4,460 | n | n |
1Average chloride concentration of pore water is from 14 to 22 ft.
2Average chloride concentration of pore water is from 17 to 30 ft.
3Average chloride concentration or pore water is from 19 to 29 ft.
U.S.
Department of the Interior | U.S. Geological
Survey
Persistent URL: https://pubs.water.usgs.gov/sir20055288
Page Contact Information: Publications Team
Page Last Modified: Thursday, 01-Dec-2016 18:48:52 EST
