水文地质工程地质2017，Vol.44Issue(2)：48-51,4.DOI:10.16030/j.cnki.issn.1000-3665.2017.02.07
利用改进的Loheide方法计算地下水的蒸散发量
Quantifying groundwater evapotranspiration by the modified loheide method
摘要
Abstract
In arid and semi-arid regions,groundwater evapotranspiration is one of the main discharges,therefore the accurate estimation of evapotranspiration is significant to groundwater resources assessments.The Loheide method is currently the most accurate method to estimate hourly groundwater evapotranspiration using diurnal water table fluctuations.Aiming to improve the detrend procedure,the linear and cubic polynomial detrend method were proposed to detrend water table data over 3 ～ 5 days.The performance of the modification was assessed quantitatively using a model.The results indicate that the linear and cubic polynomial detrend method improve the estimation to some extent for the cases that water table varies dramatically.The best method is the cubic polynomial detrend method that increases the estimation by 16％ in comparison to the original detrend method.Compared to the method which uses one-day water table data to get the detrend fluctuation,the modified method also is characterized by the enhancement of the detrend efficiency.关键词
蒸散发/地下水/昼夜波动/Loheide/改进Key words
evapotranspiration/water table/diurnal fluctuation/Loheide/modification分类
天文与地球科学引用本文复制引用
贾伍慧,尹立河,王晓勇,张俊,贺帅军,徐丹丹,张燕..利用改进的Loheide方法计算地下水的蒸散发量[J].水文地质工程地质,2017,44(2):48-51,4.基金项目
国家自然科学基金项目(41472228) （41472228）
中国地质调查局项目(121201011000150020) （121201011000150020）
