干旱区生态环境知识资源中心(Arid): 基于辐射的潜在蒸散量估算方法适用性分析

Arid

	基于辐射的潜在蒸散量估算方法适用性分析
其他题名	Assessment on radiation-based methods to estimate potential evapotranspiration
	左德鹏; 徐宗学; 程磊; 赵芳芳
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2011
卷号	34 期号:4 页码:565-574
中文摘要	根据不同气候区4个站的历史数据,选取8种基于辐射的PET估算方法,以FA056-PM法计算的PET作为参考值进行比较分析,最后用20 cm蒸发皿蒸发量对所有方法在不同气候区的适用性进行评价。其结果表明,采用初始参数时,Hargreaves法在不同气候区估算的逐月以及多年月平均PET误差均较小,其它方法则产生较大误差。校正参数后8种辐射法在不同气候区的估算结果均得到明显改进,且误差随站点湿润程度增大而减小,Makkink法在干旱以及半干旱区的民勤和延安站误差最小,Hargreaves法在半湿润以及湿润区的侯马和上海站表现最好。校正参数后所有方法在不同气候区4个站与20 cm蒸发皿蒸发量的相关系数均在0.9以上。就校正参数后的辐射法而言,建议在干旱或半干旱区优先选择Makkink法,湿润或半湿润区优先选择Hargreaves法。
英文摘要	Potential evapotranspiration is an important component of the hydrological cycle and a key input to the hydrological models.Estimation of potential evapotranspiration accurately is of great significance for water resources planning and management,important to improve the utilization of agricultural water resources,and helpful to estimate the ecological water requirements,etc.A variety of potential evapotranspiration estimation methods have been developed in the world,but most of them are only suitable for the specific climatic zones.It will result in great error if they are used without calibration.Potential evapotranspiration estimation methods used in China generally are directly from other countries,comparative evaluation on those methods is particularly needed.Methods to estimate potential evapotranspiration can be divided into temperature-based,radiation-based,mass-transfer and combination methods,etc.However,most of these methods need various data.For instance,the FA056-PM method is considered the most accurate method to estimate potential evapotranspiration in both arid and humid areas,but it has been greatly restricted in data lack regions due to great amount of meteorological data needed,such as air temperature,air pressure,humidity,wind speed,solar radiation,etc.Radiation-based methods estimate potential evapotranspiration according to the principle of energy balance.If solar radiation data is available,this kind of methods can be used to estimate potential evapotranspiration and has been widely used in many countries.But the investigation on radiation-based methods is still relatively not enough in China,and most of previous studies were focused on the impact of solar radiation on potential evapotranspiration estimation.In this study,eight radiation-based methods to estimate potential evapotranspiration with original parameters are analyzed and compared with FA056-PM method based on daily meteorological data at 4 meteorological stations in differently climatic zones during 1991 - 2001.Then parameters in eight radiation-based methods are calibrated with the combination of FA056-PM method,which is considered as the standard method to estimate potential evapotranspiration.Finally,the performance of those improved radiation-based methods is evaluated with the combination of 20 cm pan evaporation,and the conversion coefficients of potential evapotranspiration estimated by FA056-PM method and 20 cm pan evaporation are obtained.The results show that the Hargreaves method performed well for estimating monthly potential evapotranspiration while larger biases occur for other methods when the original parameters were used.After parameters were calibrated,all methods have been obviously improved in differently climatic zones,and biases decreased with the increase of humidity.The Makkink method produced least errors at Minqin and Yan’an stations in arid and semi-arid zones,while the Hargreaves method performed the best at Houma and Shanghai stations in humid and semi-humid zones.Correlation coefficients between the potential evapotranspiration estimated by using eight improved radiation-based methods and 20 cm pan evaporation in different zones are greater than 0.9.As for the improved radiation-based methods,the Makkink method is proved to have the priority to estimate potential evapotranspiration in arid and semi-arid zones while the Hargreaves method should be selected in humid and semi-humid zones.
中文关键词	潜在蒸散量 ; 蒸发皿蒸发量 ; 辐射 ; 气候区
英文关键词	potential evapotranspiration pan evaporation radiation climatic zones
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:4271775
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226466
作者单位	北京师范大学水科学研究院, 水沙科学教育部重点实验室, 北京 100875, 中国
推荐引用方式 GB/T 7714	左德鹏,徐宗学,程磊,等. 基于辐射的潜在蒸散量估算方法适用性分析[J]. 北京师范大学,2011,34(4):565-574.
APA	左德鹏,徐宗学,程磊,&赵芳芳.(2011).基于辐射的潜在蒸散量估算方法适用性分析.干旱区地理,34(4),565-574.
MLA	左德鹏,et al."基于辐射的潜在蒸散量估算方法适用性分析".干旱区地理 34.4(2011):565-574.