Inyo County
Water Department
The Owens Valley Monitor 2002-2003
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Owens Valley Precipitation
Sally Manning, Vegetation ScientistInyo County Water Department has collected
precipitation data at seven rain gauges in the Owens Valley since 1993. Precipitation
totals for Water Department rain gauges appear in Table 1. For the 2002 water year
(beginning October 1, 2001, and ending September 30, 2002), precipitation measured at the
gauges averaged about one inch. This was the lowest average precipitation recorded during
the period of record. Ninety percent of the 2002 precipitation fell between October 1 and
April 15, prior to the growing season.
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Table 1. Precipitation measured
in ICWD rain gauges by water year (October 1 of the previous year through September 30 of
the year noted).
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Precipitation
(inches) |
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| Rain Gauge |
1993 |
1994 |
1995 |
1996 |
1997 |
1998 |
1999 |
2000 |
2001 |
2002 |
| RG-1, east of
Fish Slough |
5.94 |
3.40 |
7.60 |
4.51 |
4.66 |
6.09 |
1.82 |
1.32 |
2.26 |
0.86 |
| RG-2, Laws
Museum |
6.29 |
3.62 |
7.80 |
4.55 |
4.91 |
7.34 |
2.50 |
1.73 |
3.27 |
1.28 |
| RG-3,
southeast of Bishop |
7.21 |
4.34 |
8.87 |
4.29 |
6.85 |
9.98 |
2.39 |
2.93 |
4.63 |
1.24 |
| RG-4, south of
Big Pine |
8.29 |
4.24 |
9.76 |
6.85 |
8.33 |
8.99 |
1.83 |
2.56 |
3.34 |
1.59 |
| RG-5, Goose
Lake |
6.83 |
2.15 |
7.07 |
5.64 |
7.02 |
7.47 |
1.98 |
0.80 |
2.46 |
0.75 |
| RG-6, near
Blackrock |
9.00 |
2.95 |
8.67 |
7.07 |
8.68 |
10.01 |
1.88 |
1.59 |
2.91 |
1.28 |
| RG-7, west of
Union Wash |
5.00 |
1.61 |
4.88 |
2.14 |
4.35 |
5.06 |
1.61 |
1.54 |
3.91 |
0.51 |
| Water Year
AVG |
6.94 |
3.19 |
7.81 |
5.01 |
6.40 |
7.85 |
2.00 |
1.78 |
3.25 |
1.07 |
| Pre-Growing
Season Avg (Oct 1 - Apr 15) |
6.85 |
1.81 |
6.76 |
4.45 |
4.67 |
5.81 |
1.48 |
1.17 |
2.60 |
0.97 |
| Percent in
Winter |
98.7 |
56.7 |
86.6 |
88.8 |
73.0 |
74.0 |
73.9 |
65.7 |
79.9 |
90.4 |
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