SDCL § 46-5-1: Natural flow of stream or spring--Restrictions on riparian use.

No landowner may prevent the natural flow of a stream, or of a natural spring from where it starts its definite course, or of a natural spring arising on his or her land which flows into and constitutes a part of the water supply of a natural stream, nor pursue nor pollute any of these, except as provided by § 46-5-2.