摘要
本文利用1470～1985年旱涝等级资料对海坷流域旱涝情况进行分析,得到本区旱涝具有多发性、周期性、阶段性和持续性等特征。研究结果表明目前100年气候振动仍属于一般的周期变化。本文还对历史旱涝等级数据作自然正交函数分析,根据特征向量分布和时间系数的大小划分了七种旱涝类型,并对其变化规律作些探讨。
In this paper, based on the grade data of droughts and floods (1470—1985) in the Hai River basin, an investigation on the fluctuation of droughts and floods has been carried out. The main characteristics of the droughts and floods in this area are in frequent, periodical, in-stages and continuous. The results show that the climatic fluctuation for the recent 100 years remains general periodic. Empirical orthogonal function analyses has been performed on the grade data of droughts and floods. The types of drought and flood are divided into seven according to the distribution of the eigenvector and time-weighted coefficient, and some change regulations are also discussed in this papar.
出处
《河北省科学院学报》
CAS
1989年第1期42-51,共10页
Journal of The Hebei Academy of Sciences
