西峰黄土高原土壤含水量干旱指数  

Drought Index of Soil Moisture at Xifeng in Loess Plateau

作　　者：王劲松[1] 张洪芬[1] 

机构地区：[1]中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室,甘肃兰州730020

出　　处：《土壤通报》2007年第5期867-872,共6页Chinese Journal of Soil Science

基　　金：中国科技部科研院所社会公益研究项目"中国干旱气象灾害监测预警方法研究"(2004DIB5J192);甘肃省气象局项目"西北干旱指数研究"(2005-02)共同资助

摘　　要：某时段的干旱不但与同期降水有关,还与前期降水有密切的关系,土壤水分是表达干旱的重要因子,可以综合反映干旱的变化,为此,利用1989～2004年西峰农业气象试验站的土壤水分、降水资料,分析了降水量随时间的变化,0～100cm土壤水分的垂直分布特征和时间变化规律,对春季、伏期、秋季、初春、春末初夏旱土壤含水量与降水量进行了对比分析,并制定了这几个时段的针对土壤含水量的土壤干旱指标。The drought at a period was not only related with the precipitation at the sametime, but also had a good relationship with the precipitation in past time. The soil moisture has been considered as a main factor in expression drought, and it could reflect the drought degrees. So the changes of precipitation, and soil moisture in 0-100cm were analyzed by using the data of precipitation and soil moisture from the 1989 to 2004 in Agriculture Weather Experiment Station at Xifeng. Comparison was conducted between the soil moisture and precipitation in Spring, July to August, Autumn, earlier Spring, later Spring and earlier Summer respectively. And the soil moisture drought indices were established at above several periods.

关 键 词：土壤含水量 时间变化 干旱指数 

分 类 号：S152.7[农业科学—土壤学] P462[农业科学—农业基础科学]