| Table 3. Parameter values for yearly water balances for Crater Lake, Oregon, obtained by correlations of yearly change in water level with precipitation data for the 1962-1988 time period. Uncertainties are standard errors. P-values are from t test (two tailed). Average absolute deviation is the sum of the absolute values of the difference between measured and calculated water level divided by the number of years. |
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| Table 4. Parameter values for yearly water balances for Crater Lake, Oregon, obtained by correlations of yearly change in water level with precipitation data for the 1962-1988 and 1931-1962 time periods. Water-level change as independent variable. Uncertainties are standard errors. P-values are from t test (two tailed) comparing each result for 1931-1962 time period to 1962-1988 time period. |
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| Figure 2. Water level for Crater Lake and daily precipitation at Park Headquarters averaged over years with complete records (Water years 1962-64, 1966-72, 1975-77, 1979-85, 1988-89). Water-level data from U.S. Geological Survey (1970, 1976, 1972 – 1979, 1981a & b, 1983), Alexander and others (1987, 1988, 1989), Hubbard and others (1983, 1984, 1986, 1989,1990). Precipitation data from National Oceanic and Atmospheric Administration (1961-89). |
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| Figure 3. Water level for Crater Lake (above 1882.14 m elevation) and yearly precipitation at Park Headquarters. Water year is Oct 1 to Sep 30. |
