What are the TWO major systems for determining the allocation of water in watercourses?
1. Riparian Doctrine: water belongs to those who own the land bordering the watercourse.
2. Prior Appropriation Doctrine: water belongs initially to the state, but the right to divert and use it can be acquired by an individual, regardless of whether he is a riparian owner. Rights are determined by priority of beneficial use. The norm for allocation is "FIRST IN TIME, FIRST IN RIGHT." Any PRODUCTIVE or BENEFICIAL use of the water is sufficient to create the appropriation right.