2012年7月7~10日,沂沭河流域普降暴雨到大暴雨,局部特大暴雨,临沂市累计平均降雨221mm,最大雨量点24h降雨量达310mm,沂河临沂站10日13时洪峰流量8050m3/s,为沂沭河流域近20年来最大洪水。受连续强降雨及洪水影响,7月10日,沂河茶山拦河坝段上下游发生塌岸险情,严重危及堤防工程安全,经过及时抢护,险情得到有效控制,确保了沂河行洪安全。一、工程基本情况及险情沂河茶山拦河坝位于临沂城以北 July 7 to July 10, Yishu River Basin heavy rain to heavy rain, heavy rainfall, Linyi City, the cumulative average rainfall of 221mm, the maximum rainfall 24 hours rainfall of 310mm, Linyi Yiyi River at 13:00 on the 10th peak flood 8050m3 / s, Yishu River Basin in recent 20 years the largest flood. Affected by continuous heavy rainfall and flooding, on July 10, the danger of bank collapse happened upstream and downstream of Chashan Barrage in Yi River, endangering the safety of dyke works seriously. After timely arrest and protection, the danger was effectively controlled and the flood control safety of Yi River was ensured. First, the basic situation and danger of the project Yihe Dasan Barrage is located north of Linyi City