不同口径蒸渗仪潜水蒸发差异性研究及模拟  

Study and simulation of the variability of diving evaporation in different sizes of evapotranspiration meters

作　　者：梅海鹏 汪智群 李伟 周超 MEI Haipeng;WANG Zhiqun;LI Wei;ZHOU Chao(Anhui and Huaihe River Institute of Hydraulic Research(Anhui Provincial Water Conservancy Engineering Quality Testing Center Station),Bengbu 233000,China;Key Laboratory of Water Conservancy and Water Resources of Anhui Province,Bengbu 233000,China;Anhui Huaihe Water Technolgy Co.,Ltd.,Bengbu 233001,China)

机构地区：[1]安徽省(水利部淮河水利委员会)水利科学研究院(安徽省水利工程质量检测中心站),安徽蚌埠233000 [2]水利水资源安徽省重点实验室,安徽蚌埠233000 [3]安徽淮河水资源科技有限公司,安徽蚌埠233001

出　　处：《安徽农学通报》2024年第8期111-118,共8页Anhui Agricultural Science Bulletin

基　　金：水利部重大科技项目(SKS-2022066)。

摘　　要：为探究不同小口径蒸渗仪测量潜水蒸发的差异性和随机森林回归模型对潜水蒸发的模拟效果,本研究利用五道沟实验站0.3、0.5 m^(2)蒸渗仪开展了潜水蒸发对比试验。分析两种口径蒸渗仪潜水蒸发量的相关性,并基于随机森林回归模型对两种口径蒸渗仪潜水蒸发量进行模拟,评估不同气象要素对潜水蒸发的影响。结果表明,当潜水蒸发量超过2.393 mm时,0.3 m^(2)蒸渗仪测量潜水蒸发量大于0.5 m^(2)蒸渗仪量;0.3 m^(2)蒸渗仪测量潜水蒸发存在迟滞效应。净辐射对于0.3 m^(2)蒸渗仪潜水蒸发量影响更大,在气象因素对0.5 m^(2)蒸渗仪潜水蒸发影响中,40 cm土壤含水量的影响更大。空气湿度、土壤湿度是导致0.3、0.5 m^(2)小口径蒸渗仪潜水蒸发存在差异的主要因素,可利用随机森林回归模型通过气象要素对潜水蒸发进行预测。In order to investigate the variability of phreatic evaporation measured by different small-diameter lysimeters and the simulation effect of the random forest regression model on phreatic evaporation,a comparison experiment of phreatic evaporation was carried out by using 0.3 and 0.5 m^(2) lysimeters in Wudaogou Experimental Station.The correlation of phreatic evaporation of two calibers of evapotranspiration meters was analyzed,and the phreatic evaporation of two calibers of lysimeters was simulated based on the random forest regression model,and the significance of the influence of different meteorological elements on phreatic evaporation was evaluated.The results showed that when the phreatic evaporation exceeds 2.393 mm,the phreatic evaporation measured by 0.3 m^(2) lysimeter was larger than that by 0.5 m^(2) lysimeter;there was a hysteresis effect in the diving evaporation measured by 0.3 m^(2) lysimeter.Net radiation had a greater effect on 0.3 m^(2) lysimeter phreatic evaporation,and among the effects of meteorological factors on 0.5 m^(2) lysimeter phreatic evaporation,40 cm soil water content had a greater effect.Air humidity and soil moisture were the main factors that lead to the difference in phreatic evaporation from 0.3 and 0.5 m^(2) lysimeters,and the random forest regression model could be used to predict phreatic evaporation through meteorological factors.

关 键 词：蒸渗仪 潜水蒸发 口径 随机森林回归模型 

分 类 号：S152.7[农业科学—土壤学]