摘要
以大型称重式蒸渗仪系统的实测农田蒸散量数据为基础,分别从年、月、日和生长季4个尺度分析长武塬区农田蒸散量的变化特征,采用相关分析和主成分分析法探究其影响因素,建立实测蒸散与影响因素之间的定量关系。结果表明:农田蒸散的变化特征与作物生长进程一致,高蒸散期均出现于作物生育旺期,且受到降水、气温、风速、太阳辐射、日照时数、空气相对湿度和土壤含水量的共同作用,其中,气温和太阳辐射是蒸散的主要驱动因素。
The study analyzed the variation characteristics of farmland evapotranspirationin Changwu tableland from four scales： yearly,monthly,daily and growing seasonbased on observation datafrom large scale lysimeter system and explore the influencing factors by using correlation analysis and principal component analysis method. The quantitative relationship between measured evapotranspiration and influencing factors is established. The results show that the variation characteristics of farmland evapotranspiration are consistent with the growth process of the crops and the high evapotranspiration occurs in the booming period. The evapotranspiration is affected by precipitation,air temperature,wind speed,solar radiation,sunshine hours,air relative humidity and soil water content. Temperature and solar radiation are the main driving factors of evapotranspiration.
出处
《水资源与水工程学报》
CSCD
2017年第5期37-42,共6页
Journal of Water Resources and Water Engineering
基金
国家重点研发计划项目(2016YFA0601501
2016YFA0601601
2016YFC0402704)
国家自然科学基金项目(41330854
41371063
41401026
41371047)
水文水资源与水利工程科学国家重点实验室专项经费(1069-514031112
2015490811)
关键词
农田蒸散量
变化特征
驱动因素
相关性
长武塬区
farmland evapotranspiration
the variation characteristics
driving factor
relevance
Chang-wu tableland
