三川河流域继1983年～1992年被列为全国水土保持重点治理区之后，1993年～1997年又被列为二期重点治理区。离石市二期规划治理的40条小流域，5年间新增治理度66％，累计治理度达到79．2％，形成了自己的治理特点，总结出一套值得鉴借的经验。 Sanchuan River Basin from 1983 to 1992 was listed as the key areas for soil and water conservation after the 1993 to 1997 was again classified as two key areas. In 40 small watersheds managed by Phase II of Lishi City, 66% of new degrees of control were added in 5 years, and the cumulative degree of control reached 79.2%, forming their own governance features and summing up a set of experiences worth learning from.