What significant water resource plan was published in 1931?

The State Water Plan, published in 1931, is a crucial document in California's water management history as it laid the foundation for the state's approach to water resources. This plan emerged during a time of increasing awareness about the need for comprehensive water management strategies to support California's growing population and agricultural needs. It emphasized the importance of developing and managing water resources systematically and introduced the idea of state intervention in water management.

The 1931 plan set forth proposals for water infrastructure development, including reservoirs and aqueducts, which would play a vital role in transporting water from the water-rich northern regions to the drier southern areas. This early vision significantly influenced subsequent water policies and infrastructure projects throughout California, shaping both the physical landscape and the legal framework surrounding water rights and usage.

In contrast, the other options either refer to plans or strategies that were developed later or do not capture the same level of significance in the historical context as the State Water Plan. Understanding the development and implications of the State Water Plan is essential for grasping the complexities of California's ongoing water issues.