摘要
为研究扬州地区参考作蒸发蒸腾量(ET_(0))不同时间尺度的变化特征,采用1960-2017年气象数据,利用Penman-Monteith公式计算了ET_(0),发现1—12月ET_(0)表现为先增加后减小的趋势。夏季ET_(0)最大,其次为春季、秋季、冬季。趋势分析显示1960—2017年春季ET_(0)表现为显著增加的趋势,其他季节变化趋势不显著;年ET_(0)表现为显著增加的趋势。小波分析显示扬州地区的年ET_(0)存在20~28、29~42、43~64年变化周期;其中29~42、43~64年的变化周期具有全局性,周期变化最明显。研究结果可为扬州地区灌溉排水规划和防灾减灾提供参考依据。
In order to study the variation characteristics of evaporation and transpiration(ET_(0))of reference crops in Yangzhou area on different time scales,using lake meteorological data from 1960 to 2017,the ET_(0) was calculated by penman Monteith formula.It was found that from January to the next December,ET_(0) showed a trend of first increasing and then decreasing.ET_(0) was the largest in summer,followed by spring,autumn and winter.Trend analysis shows that ET_(0) showed a significant increase trend from 1960 to 2017 spring,and other seasonal trends are not significant;ET_(0) showed a significant increase trend in.Wavelet analysis shows that the annual precipitation in Yangzhou had 20~28 years,29~42 years and 43~64 years;Among them,the change cycles of 29~42 years and 43~64 years were overall,and the cycle change was the most obvious.The results can provide reference for irrigation and drainage planning and disaster prevention and mitigation in Yangzhou.
作者
吴灏
陶雨欣
卞朝阳
WU Hao(Yangzhou University School of Hydraulic Science and Engineering,Yangzhou,Jiangsu 225009)
出处
《农业灾害研究》
2022年第9期148-150,共3页
Journal of Agricultural Catastrophology
基金
扬州大学大学生科技创新基金(X20220491)。
关键词
扬州地区
蒸发蒸腾量
变化
特征
Yangzhou area
Evapotran-spiration
Changes
Features
