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Rainfall and stream runoff in Southern California since 1769.
This report consists of a compilation and study of the varied information available for the purpose of determining and reconstructing the record of rainfall and runoff fluctuations in Southern California since the arrival of the Spanish Mission Fathers in 1769. By 1931, data regarding rainfall and stream runoff in Southern California had only been collected by rain gauges for approximately 50 years. Beginning in 1769 with the establishment of the first Spanish Mission in Alta California substantial amount of data existed in the form of the letters and reports from Mission Padres who related in detail information regarding the rain and the floods. In 1834 when the Mexican government took over the mission lands, the Padres records ceased. In their place, whalers, trading ships and others entering Upper California carried on the narrative that the missions had previously recorded.
Metropolitan Water District of Southern California
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"1931 - Rainfall and Stream Run-Off in Southern California since 1769" (2018). Miscellaneous Documents and Reports. 55.