关中地区水文、气象干旱特征对比研究

Comparative Study on Hydrologic-meteorological-drought Characteristics of Guanzhong Areas

从周期更替、丰枯转移入手,探求水文、气象干旱发生的起讫时刻、延续时间、影响深度;划分水文、气象干旱级别,应用负轮理论、游程理论,分析丰枯转移概率及连续丰、枯年的分布特点;引入马尔可夫平稳概率研究干旱发生的自然属性,以干旱强度、干旱周期、丰枯转移概率等指标,全面刻画本地区水文气象干旱的特征。。

From researching period variation and transfer between ample water and low water, this paper studies hydrologic-meteorological-drought's initial and end moment, delay time, influence depth. And defines hydrologic-meteorological-drought index; runs theory, displacement theory and stochastic process theory are used to analyze the continual ample water and low water and the transfer probability and its distribution features. Based on index of drought strength, drought period and transfer probability between ample water and low water, this paper describes hydrologic-meteorological-drought characteristics of Guanzhong areas.