| Table 5. Parameter values for water balances for Crater Lake, Oregon, using daily data. Each case is an average of several year’s data. Measured precipitation is adjusted using coefficient Ba to satisfy long-term water balance at the end of the year. Average absolute deviation is difference between calculated water supplies based on equations (9) and (10>. Water supply for a = 1.0 assumes no precipitation is accumulated as snow on crater walls. Other values of a based on minimizing average absolute deviation. |
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| Table 6. Parameter values for water balances for Crater Lake, Oregon, using daily data. Each case is an average of several year’s data. Average absolute deviation is difference between calculated water supplies based on equations (8) and (9). Values of B and a obtained by minimizing average absolute deviation. |
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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). |
