干旱区生态环境知识资源中心(Arid): 额济纳绿洲草地蒸散系数研究

Arid

	额济纳绿洲草地蒸散系数研究
其他题名	Study on Evapotranspiration Coefficient of Grassland during the Growing Season in the Ejina Oasis
	侯兰功 1; 肖洪浪2
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2012
卷号	19 期号:5 页码:126-129
中文摘要	联合国粮农组织推荐的蒸散计算方法中,蒸散系数是计算实际蒸散必不可少的参数。本文从蒸散系数的定义出发,在2005年额济纳绿洲生长季连续观测的基础上,运用波文比能量平衡法计算额济纳绿洲草地的实际蒸散量,利用FAO 56Penman-Monteith模型计算草地的参考蒸散,将实际蒸散与参考蒸散相除即得到额济纳绿洲草地的蒸散系数。通过研究发现:生长季草地的蒸散量(ETc)为446.96mm,从生长季初期开始,草地的蒸散量开始增加,在6月后半月达到最大值6.724mm/d,此后蒸散量开始快速下降,在生长季末期达到最低值1.215mm/d;蒸散系数(Kc)呈现出与蒸散量(ETc)相同的变化趋势,自生长季初期开始蒸散系数快速上升,在6月后半月达到生长季最大值0.623,之后随着草地生长减缓,蒸散系数快速下降,直至生长季末期草地停止生长。对额济纳绿洲草地蒸散系数的计算可以为该地区准确估算草地生态需水量提供依据。
英文摘要	According to works of Food and Agriculture Organization of the United Nations,evapotranspiration coefficient is essential parameter to calculate actual evapotranspiration.Based on the definition of evapotranspiration coefficient and successive observation,evapotranspiration(ETc) of grassland in the Ejina oasis of northwest China was estimated by application of Bowen ration-energy balance method(BREB),and reference evapotranspiraiton was calculated by using FAO 56 Penman-Monteith model during the growing season in 2005.Then,according to the definition,the evapotranspiration coefficient of grassland was given in the Ejina oasis.During the growing season,total ETc was 446.96 mm.From the beginning of growing season,the ETc increased gradually,and reached its maximum value of 6.724 mm/d in the last fifteen days of June.Hereafter the ETc dropped rapidly,and reached its minimum value of 1.215 mm/d at the end of growing season.The variation pattern of crop coefficient(Kc) was similar to that of ETc.From the beginning of growing season,the Kc value increased rapidly,and reached its maximum value of 0.623 in the last fifteen days of June.Afterward,with slowing growth of grassland,the value dropped rapidly at the end of growing season.The evapotranspiration coefficient is helpful to estimate accurately ecological water demand of grassland in the Ejina oasis.
中文关键词	额济纳绿洲 ; 生长季 ; 蒸散系数 ; 蒸散发
英文关键词	Ejina oasis the growing season evapotranspiration coefficient evapotranspiration
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4643775
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228631
作者单位	1.滁州学院地理信息与旅游学院, 滁州, 安徽 239000, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	侯兰功,肖洪浪. 额济纳绿洲草地蒸散系数研究[J]. 中国科学院西北生态环境资源研究院,2012,19(5):126-129.
APA	侯兰功,&肖洪浪.(2012).额济纳绿洲草地蒸散系数研究.水土保持研究,19(5),126-129.
MLA	侯兰功,et al."额济纳绿洲草地蒸散系数研究".水土保持研究 19.5(2012):126-129.