黄河上游水库调节对宁蒙河段防凌的影响  

Effect of Reservoir Operation in the Upper Yellow River on Ice Prevention in Ningxia-Inner Mongolia Reach

作　　者：刘晓岩[1] 司源[2] 

机构地区：[1]黄河水利委员会防汛办公室,河南郑州450003 [2]河海大学水利水电学院,江苏南京210098

出　　处：《人民黄河》2011年第10期4-6,共3页Yellow River

摘　　要：分析了龙羊峡、刘家峡水库联合运用对宁蒙河段防凌的影响。结果表明:水库的联合运用使宁蒙河段凌期流量过程趋于均匀;水电站泄流的热传导作用使头道拐断面以上河段11月和3月的水温升高了0.1～1.7℃;水动力作用和热力的影响使巴彦高勒以上河段流凌时间推迟13～15 d,河段首封日期推迟了7 d,主要断面封冻天数减小了8～33 d,开河日期提前了15 d,开河历时延长了7 d;"文开河"所占比例由无库时的30%增加到70%以上,凌峰流量减小,冰凌灾害得以减轻。This paper analyzes the effect of joint operation of Longyangxia and Liujiaxia reservoirs on the ice prevention in the Ningxia-Inner Mongolia reach.The result shows that the joint reservoir operation made the runoff process tend to be even during the ice jam period;that the heat conduction of the discharge from hydropower stations made the water temperature in November and March in the reaches upstream of Toudaoguai cross-section rise by 0.1-1.7 ℃;that the hydrodynamic force and the heat delayed the ice flowing time by 13-15 d,delayed the first ice jam date by 7 d,decreased the freezing period at major sections by 8-33 days,made the ice break date come 15 d earlier and the ice break period 7 d longer in the reaches upstream of Bayangaole;and that the times of ＂gentle ice break＂ increased to over 70% of the total from 30% when there was no joint reservoir operation,thus ice peak flow was decreased and the slush calamity was reduced.

关 键 词：防凌 水库调节 龙羊峡水库 刘家峡水库 宁蒙河段 黄河 

分 类 号：TV875[水利工程—水利水电工程] TV882.1