Only with the development of human society, and along with the water resources changing from plenty to rareness, the water right system is formed and changed.

• 本文通过对河岸权制度和优先权制度的比较分析，考察每种制度的优势以及存在和进一步演进的客观必然性，明晰水权制度变迁的客观动因，从而为合理构建我国水权制度提供有益的借鉴。