摘要
本文根据最新收集到的史料记载等资料,对原甘肃500年旱涝等级进行了增补和修改,并将资料延续至1989年,最终得到一套目前为止最可靠的连续的1470—1989共520年旱涝等级序列。并据此统计了甘肃历史旱涝分布特征及变化规律,同时分析了干旱频率的趋势和周期变化。
The paper, based on the recently collected historical records and other
information, has revised the original 500-year drought-flood grade series
and enlarged to 1989, finally obtains a most reliable 520-year drought-flood
grade series from 1470-1989. On these grounds, the authors discuss the
features and variation laws of historical drought-flood distribution,
simultaneously analyze the trend and periodic variation of drought occured
frequencies.
出处
《干旱区资源与环境》
CSCD
1992年第1期68-74,共7页
Journal of Arid Land Resources and Environment
关键词
旱涝特征
干旱
频率
甘肃
Drought-Flood Feature
Drought Occured Frequency
Variation
