Many of the rivers of Pennsylvania or sections thereof and related adjacent land areas, possess outstanding aesthetic and recreational values of present and potential benefit to the citizens of Pennsylvania. It shall be the policy of the Commonwealth to protect these values and to practice sound conservation policies and practices within this scenic rivers system. It is, therefore, essential that a Pennsylvania Scenic Rivers System be developed so that these purposes may be fulfilled. The General Assembly affirms that it must assure the people of this generation and their descendents the opportunity to refresh their spirits with the aesthetic and recreational qualities of unspoiled streams. To implement these policies it is the purpose of this act to establish the Pennsylvania Scenic Rivers System by prescribing the procedures and criteria for protecting and administering the system and for adding new components to it from time to time.