各时段城陵矶水位变化特征及其成因分析

发布时间：2018-08-20 18:54

【摘要】：为进一步了解城陵矶水位的变化规律,采用线性回归法和原始资料观测法分析了城陵矶1955~2014年的水位流量变化规律及其成因。结果表明,年际间,城陵矶流量逐时段呈减小趋势,水位呈增加趋势,且流量变幅大于水位;年内,城陵矶水位逐时段出现了汛期5~10月流量大幅减小、水位小幅升高及枯季1~3月流量变幅小、水位显著升高的现象,前者主要是因为顶托作用加强和河床淤积共同造成,后者主要因河床淤积抬高水位所致;城陵矶极干旱年份(2006年)的水位较正常年份(2007年)出现了水位枯季不落、汛期不汛的现象,四水及区间汇流的增加是造成枯季不落的主要原因,而松滋、太平和藕池分流比的减小是引起8~9月城陵矶水位降低的主导因素。
[Abstract]:In order to further understand the variation law of water level in Chenglingji, the variation of water level and discharge in Chenglingji from 1955 to 2014 and its causes were analyzed by linear regression method and original data observation method. The results show that the discharge of Chenglingji decreases in each period of the year, and the water level increases, and the variation of discharge is larger than that of water level, and the discharge of Chenglingji decreases greatly from May to October in flood season. The phenomenon of small increase of water level and small change of discharge from January to March in dry season, the former is mainly caused by the strengthening of topping and deposition of river bed, and the latter is mainly caused by river bed silt raising water level. The water level in Chenglingji Polar drought year (2006) was higher than that in normal year (2007), the water level did not fall in the dry season, flood season did not flood, the increase of four water and interval confluence was the main reason for the dry season not falling, and Songzi, The decrease of distribution ratio of Taiping and lotus root pool is the main factor that causes the water level to decrease in Chenglingji from August to September.
【作者单位】：武汉大学水资源与水电工程科学国家重点实验室;
【基金】：水利部公益性行业科研专项项目(212000353)
【分类号】：P333

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