在对黄河宁夏、内蒙古河段及万家寨水库库区凌情实地查勘的基础上 ,对凌汛实测资料进行了分析。宁蒙河段1999～ 2 0 0 0年度凌情具有封冻河段长、冰盖厚、槽蓄水量大、开河平稳等特点。形成本年度凌情特点的主要原因是气温偏低、流量大等。建议完善河道堤防 ,加强凌情测报和制定万家寨水库最佳防凌调度运用方案 Based on the field survey of Linghai in Yellow River Ningxia, Inner Mongolia reach and Wanjiazhai reservoir area, the measured data of Lingxun were analyzed. The Ningmeng River section of 1999 ~ 2000 had the characteristics of long frozen river section, thick ice sheet, large storage capacity of waterway and open river. The main reason for the formation of this year’s adversity characteristics is the low temperature, large flow and so on. Suggestions to improve the river embankment, strengthen the intelligence reporting and the development of Wanjiazhai Reservoir optimal anti-Ling scheduling program