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.
出处
《土壤通报》
CAS
CSCD
北大核心
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
