Which doctrine governs water rights in states where water is scarce?

• A. Riparian rights
• B. Littoral rights
• C. Fixture
• D. Doctrine of prior appropriation

Answer: (D)

Scarcity of water in arid states leads to a system that allocates rights by priority of use rather than by land ownership along a watercourse. The doctrine of prior appropriation says the first person to divert and beneficially use water gains a senior right, and those senior rights are satisfied before newer, junior rights during shortages. This framework provides predictability and stability for farmers, cities, and industry in environments where water is limited, because rights stay with the person or entity that first put the water to use, regardless of who owns the land beside the stream.

In contrast, riparian rights tie water use to land adjacent to a watercourse and assume a plentiful supply, which doesn’t fit well with scarce water conditions. Littoral rights apply to coastal or large stationary bodies like seas and lakes, not rivers. Fixture is a property term about objects attached to land, not about who may use water.