甘肃黄土高原帕尔默旱度模式的修订

The Modification of Palmer Drought Severity Model for Gansu Loess Plateau

干旱是甘肃黄土高原雨养农业区最主要的气象灾害,干旱的发生包含许多复杂过程和条件,因而研究一个考虑因子较为全面的干旱指标较为困难。本文在美国帕尔默旱度模式和中国修正的帕尔默旱度模式的基础上,根据本区特点,从建模资料站点、可能蒸散计算、土壤田间持水量和径流计算等几个方面进行了修正,并利用甘肃黄土高原12个站点的资料,建立了适用于本区的旱度模式,以期为本区的干旱研究提供一种有效的工具。

Drought is the most serious meteorological disaster in Gansu loess pltateau. It is difficult to develop a drought index considering meteorological factors comprehensivly because of the complexity of drought . On the base of the Palmer Drought Severity Model of America and the modified Palmer Drought Severity Model for China, we further modified the model in stations,the calculation of potential evapotranspiration and runoff, etc. As a result ,a revised model of drought severity has been established in this paper which is expected to be applicable for drought research on this region.