摘要
基于清江流域主要气象站恩施、巴东、来凤、五峰的月降水量以及代表水文站隔河岩站1951~2009年共59a的月径流量资料,采用年内分配集中度、集中期、不均匀系数、完全调节系数等多种指标对清江流域降水径流的年内分配特征做了综合分析,通过标准化处理的降水径流数据对二者的年内分配的同步性进行了研究,结果表明:1)各年代及多年平均降水、径流年内分配极为不均,夏季降水量、径流量均占全年总量的40%以上;20世纪70年代平均降水、径流年内分配与其他各年代特征存在显著区别,表现出6月、9月两个峰值.2)降水径流年内分配特征的年际变化剧烈,而就研究期而言年内分配未出现极端均匀或者极端不均的情况,同时年内集中降水和集中径流均具有自7月向6月转移的趋势.3)标准化处理后的各年代平均及59a多年平均降水径流年内分配特征展现了整体上的同步性,以及秋冬两季局部不同步的特点.
Based on monthly precipitation and runoff data from 1951 to 2009 in Qingjiang basin,the concentra- tion degree, concentration period, nonuniform coefficient, completely regulation coefficient and data standardi- zation method are used to analyze the variation of annual precipitation and runoff distribution and their syn- chronism.The results show that：l）The annual precipitation and runoff are uneven distribution; precipitation and runoff in summer occupy more than 40% amounts of the whole year; precipitation and runoff of 1970s have 2 peaks. 2）The variation of annual precipitation and runoff distribution have drastic annual change but there are not extreme situation; meanwhile, the concentration period of annual precipitation and runoff have the trend to move from July to June. 3）The standardized data show that precipitation and runoff annual distri- bution have synchronism; but in autumn and winter, the runoff does not synchronize with precipitation.
出处
《三峡大学学报（自然科学版）》
CAS
2017年第6期25-30,共6页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金(NSFC-50979023)
水利部公益性行业科研专项(201201026)
关键词
清江流域
降水
径流
年内分配
标准化
同步性
Qingjiang Basin
precipitation
runoff
annual distribution
standardization
synchronism
