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Caption: This graph shows average temperatures measured in Walker Creek at various sites and during several monitoring periods in 2002. Measurements were taken at 15-minute intervals during deployment periods lasting from 4 to 15 days (See Source Table). The x-axis represents the start date of monitoring and the abbreviations in the legend are sampling station IDs. All average temperatures were within the optimal range for salmonids, however maximum temperatures (see next topic) were generally above optimum in the May and August sampling periods. The reference value of 10-15.6°C optimum temperature range for juvenile salmonid rearing is based on McCullough (1999). Data were collected by the San Francisco Bay Regional Water Quality Control Board as a part of the Surface Water Ambient Monitoring Program (SWAMP). See Map for sampling locations and Info Links for more information.
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