Excerpt from Upper Santa Ana River Drainage Area Land and Water Use Survey, 1964
In 1948, an intensive land and water use survey was conducted on a statewide basis. This information was published in State Water Resources Board Bulletin No. 2, "Water Utilization and Requirements of California", June 1955. The 1948 survey also served as the basis for a more detailed report on the entire Santa Ana River drainage area. This was published as Department of Water Resources" Bulletin No. 15, "Santa Ana River Investigation", February 1959.
To bring information on land and water use in the Upper Santa Ana River drainage area up to date, the Department began a new survey in 1957 and released Department of Water Resources" Bulletin No. 71, "Upper Santa Ana River Drainage Area Land and Water Use Survey, 1957", May 1960. Bulletin No. 71-64, then, updates land and water use as presented in Bulletin No. 71.
Such updating of land and water use data has been carried on since 1957 for different areas throughout the Southern District as set forth in Sections 225, 226, and 232 of the California Water Code.
The Department of Water Resources expresses its thanks to the many farmers of the area without whose cooperation detailed crop mapping would not have been possible.
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