This act shall be deemed to be an exercise of the police powers of the Commonwealth for the general welfare of the people of this Commonwealth, to provide for the conservation and improvement of areas of land affected in the surface mining of noncoal minerals, to aid in the protection of birds and wildlife, to enhance the value of the land for taxation, to decrease soil erosion, to aid in the prevention of the pollution of rivers and streams, to protect and maintain water supply, to protect land, to enhance land use management and planning, to prevent and eliminate hazards to health and safety and generally to improve the use and enjoyment of the lands.