摘要
采用水文变异诊断系统对三水站1959-2000年月径流序列进行变异分析，根据诊断的变异点将径流划分为水文特征相似的三个时段，用不均匀系数、集中度、集中期及变化幅度等指标对径流年内分配特征变化进行描述。结果袁明，洪水对河床冲刷下切和大规模的人工采沙造成了三水站年内分配特征发生变化。
Hydrological alteration diagnosis system was applied to analyze the variation of the Sanshui Station＇s monthly runoff series from 1959 to 2000. It＇s indicated that the monthly runoff series were divided into three periods by two change points. Then, index such as unevenness coefficient, runoff concentration degree and time, amplitude of variation were calculated to describe the annual runoff distribution changes. The cause analysis shows that deepening of riverbed at Sanshui Station caused by floods and human＇s large-scale mining of sand results in the changes of annual runoff distribution characteristics.
出处
《水电能源科学》
2008年第4期5-7,20,共4页
Water Resources and Power
基金
国家自然科学基金资助项目(50579052)
关键词
月径流
年内分配
水文变异
诊断系统
monthly runoff
annual distribution
hydrological alteration
diagnosis system
