甘肃黄土高原土壤水分气候特征

doi:10.11867/j.issn.1001-8166.2005.09.1041

地球科学进展 ›› 2005, Vol. 20 ›› Issue (9): 1041 -1046. doi: 10.11867/j.issn.1001-8166.2005.09.1041

干旱气象研究上一篇

甘肃黄土高原土壤水分气候特征

孙秉强，张强，董安祥，陈少勇

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

收稿日期:2005-05-11 修回日期:2005-07-13 出版日期:2005-09-25
通讯作者: 孙秉强
基金资助:
甘肃省科技公关项目“甘肃干旱生态环境对全球气候变暖的响应及减灾技术的研究”（编号：2GS042-A44-017）资助.

EVOLUTION FEATURE ON THE MOISTURE OF SOIL FOR LOESS HIGHLAND IN GANSU

SUN Bingqiang; ZHANG Qiang;DONG Anxiang;CHEN Shaoyong

Key Laboratory of Arid Climatic Variation and Disaster Reduction, Lanzhou Arid Meteorological Institute,Chinese Meteorological Administration, Lanzhou 730020, China

Received:2005-05-11 Revised:2005-07-13 Online:2005-09-25 Published:2005-09-25

下载PDF ( 2003 )

利用甘肃黄土高原42个气象站1961—2000年3～7月降水量和11个农业气象观测站逐年3～11月上旬的土壤重量含水率资料，分析了甘肃黄土高原土壤水分的地域和时间分布特征。结果表明：①甘肃黄土高原土壤水分从西南向东北减少，中部有一条从北向南的干舌，干旱中心在陇中北部，受六盘山的影响较大；②甘肃黄土高原分为7个气候区：陇中、陇东土壤严重缺水区，陇中、陇东土壤季节性缺水区，土壤水分适宜区，土壤水分湿润区和甘南高原土壤水分湿润区；③陇中北部和陇东北部土壤严重缺水区浅层土壤严重缺水主要出现在春季和春末夏初，深层土壤也常年处于缺水状态。季节土壤缺水区浅层主要缺水在5、6月份，深层土壤水分陇东高于陇中，适宜区和湿润区无明显土壤缺水时段。

关键词: 甘肃黄土高原, 土壤水分, 气候变化

By precipitation data of 42 Gansu stations of loess plateau in March to July from 1961 to 2000 year and the soil weight information of moisture content at 11 agricultural meteorology stations from build station to 2000 year in March to November. Time distribution feature and the region of the Gansu soil moisture of loess plateau were analyzed. Show as a result:(1) The Gansu soil moisture of loess plateau decreases from southwest to northeast, central part has a dry tongue from north to south, arid center locate in Central part of Long north. (2) The soil moisture change of Gansu loess plateau has 7 districts: Soil serious short of water district in east of Long, Central part of Long, Soil seasoning short of water district in east of Long, Central part of Long, Soil moisture suitable district, Soil moisture moist district and Ganlan highland soil moisture moist district. (3) In soil serious short of water district in east of Long, Central section of Long, Shallowlayer soil serious short of water mainly appearance in spring, late spring and early summer, deep layer soil is also short of water state in all the year; In soil seasoning short of water district, shallowlayer short of water is in May and June mainly,deep layer soil moisture in east of Long is higher than Central section of Long.

Key words: The loess plateau in Gansu, Soil moisture, Climate evolution feature. 

中图分类号:

P461+.4

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