沂沭河管理处统管河道总长513.38公里,堤防总长705.62公里。由于沂沭河的治理标准起始不高,加上年久老化、自然退化,河道、堤防的行洪、抗洪能力逐年下降,险工隐患增多,工程现状令人担忧。一、工程现状堤防工程单薄,高程不足。705.62公里长的堤防中,堤顶达到4～6米宽、高程标准超过20年一遇洪水位1.5米的仅有161公里,其余堤防大部分顶宽不足 Yishu River Management Office totals 513.38 km long river, embankment total length of 705.62 km. Due to the low initial standard of Yishu River governance, coupled with aging, natural degradation, flood control in rivers and embankments, flood control ability declining year by year, increasing risks of workmen and the current status quo of the project are worrisome. First, the current status of the project Dike weak, inadequate elevation. In the 705.62-kilometer embankment, the embankment reaches 4 to 6 meters wide and the standard of elevation is only 161 kilometers when the flood level reaches 1.5 meters for more than 20 years. Most of the remaining embankments are not wide enough