干旱区生态环境知识资源中心(Arid): 用拱棚法对极干旱区GSPAC水分运转的分析

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	用拱棚法对极干旱区GSPAC水分运转的分析
其他题名	GSPAC water movement by greenhouse method in the extremely dry area
	李红寿; 汪万福; 张国彬; 张正模; 王小伟
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2010
卷号	33 期号:4 页码:572-579
中文摘要	在典型极干旱气候条件下,在敦煌莫高窟窟顶戈壁上搭建封闭塑料拱棚,经235 d的膜面凝结水分的持续抽取和土壤水分监测表明:在潜水埋深200 m以下的极干旱区,有2.1 g.m~(-2).d~(-1)的水分向上运转与输出;在长期的水分输出后,土壤湿度不但没有下降,反而上升,明显高于初始湿度和对照;棚内外土壤空气相对湿度、绝对湿度和温度的监测发现,存在水分向上连续运转的条件和机制,可排除水分来自外部土壤和大气侧入的可能.由此判定,在埋深较深的极干旱地区存在潜水蒸发,潜水是土壤水分的重要来源,并通过土壤的"呼吸"与大气保持着交流.土壤盐分对土壤水分的运转和时空异质分布有重要影响.极干旱气候、地热和上层土壤的温度变化是引起GSPAC水分运转和潜水蒸发的根本原因
英文摘要	In typically and extremely dry climate condition, a PVC greenhouse-canopy was built on Mogao Grottoes' roof on a gobi. After 235 days' continuously extracting out of condensation water from the film of the greenhouse, and through monitoring soil water content,it was found that there were 2.1g.m~(-2).d~(-1) groundwater being moved up and exported from the greenhouse soil in the extreme dry area where groundwater was more than 200 m deep. After long-term exporting water, the soil water content was not getting lower, instead, it was obviousily higher than that before it being controlled and coved. From monitoring these elements, such as soil air RH, absolute humidity and temperature inside and outside the canopy,it was discovered that the condition and mechanism of groundwater continuing moving up was existed, and the possibilities of water inside the greenhouse coming from outside soil and atmosphere could be debarred. By these judgment,in the extremely dry areas where the phreatic water was buried deeply, its evaporation is existed. The phreatic water is soil moisture's important source. Through soil's "respiration", the moisture exchanging between soil and atmosphere is kept. Soil salinity has important effects on soil moisture movement and spatio-temporal distribution of its heterogeneity. The extremely dry climate, terrestrial heat and upper soil's temperature change are an ultimate reason why GSPAC 's moisture transportation and phreatic ' water's evaporation are taken place
中文关键词	拱棚法 ; GSPAC系统 ; 极干旱地区 ; 水分运转
英文关键词	greenhouse method GSPAC system the extremely dry area water movement
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:3967100
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378665
作者单位	李红寿, 敦煌研究院保护所, 古代壁画保护国家文物局重点科研基地, 敦煌, 甘肃 736200, 中国.; 汪万福, 敦煌研究院保护所, 古代壁画保护国家文物局重点科研基地, 敦煌, 甘肃 736200, 中国.; 张国彬, 敦煌研究院保护所, 古代壁画保护国家文物局重点科研基地, 敦煌, 甘肃 736200, 中国.; 张正模, 敦煌研究院保护所, 古代壁画保护国家文物局重点科研基地, 敦煌, 甘肃 736200, 中国.; 王小伟, 敦煌研究院保护所, 古代壁画保护国家文物局重点科研基地, 敦煌, 甘肃 736200, 中国.
推荐引用方式 GB/T 7714	李红寿,汪万福,张国彬,等. 用拱棚法对极干旱区GSPAC水分运转的分析[J],2010,33(4):572-579.
APA	李红寿,汪万福,张国彬,张正模,&王小伟.(2010).用拱棚法对极干旱区GSPAC水分运转的分析.干旱区地理,33(4),572-579.
MLA	李红寿,et al."用拱棚法对极干旱区GSPAC水分运转的分析".干旱区地理 33.4(2010):572-579.