Riparian zone evapotranspiration estimation from diurnal groundwater level fluctuations
Riparian zone evapotranspiration estimation from diurnal groundwater level fluctuations
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DOI：
10.1016/j.jhydrol.2007.10.049
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发表时间：
2008-01
影响因子：
6.4
通讯作者：
Z. Gribovszki;P. Kalicz;J. Szilágyi;Mihály Kucsara
中科院分区：
文献类型：
--
作者：
Z. Gribovszki;P. Kalicz;J. Szilágyi;Mihály Kucsara
河岸植被对地下水位和地下水维持的河流基流有很大的影响。通过修改白色[白色，W.N.，1932.根据植物排放和土壤蒸发估算地下水供应量的方法--犹他州埃斯卡兰特谷的调查结果--美国地质调查局。供水论文659-A，1-105]的经验和水力版本的一个新的技术，开发计算蒸发蒸腾量（ET）从地下水位读数在河岸带。该方法进行了测试，从Hidegvíz谷实验集水区，位于匈牙利西部边境的索普隆丘陵地区的水文气象数据。所提出的方法的ET率落后于Penman-Monteith方法，但在其他方面，这两个估计比较有利的一天。在夜间，新技术产生更现实的价值比彭曼-蒙特斯方程。每天，新得出的ET率通常比原始白色方法获得的ET率高50%。敏感性分析表明，我们的ET估计技术的更可靠的水力版本是最敏感的（即，线性）的实验室和/或段塞试验得出的值的饱和水力传导率和特定的产量从河岸带。
Riparian vegetation typically has a great influence on groundwater level and groundwater-sustained stream baseflow. By modifying the well-known method by White [White, W.N., 1932. Method of estimating groundwater supplies based on discharge by plants and evaporation from soil – results of investigation in Escalante Valley, Utah – US Geological Survey. Water Supply Paper 659-A, 1–105] an empirical and hydraulic version of a new technique were developed to calculate evapotranspiration (ET) from groundwater level readings in the riparian zone. The method was tested with hydrometeorological data from the Hidegvíz Valley experimental catchment, located in the Sopron Hills region at the western border of Hungary. ET rates of the proposed method lag behind those of the Penman–Monteith method but otherwise the two estimates compare favorably for the day. At nights, the new technique yields more realistic values than the Penman–Monteith equation. On a daily basis the newly-derived ET rates are typically 50% higher than the ones obtainable with the original White method. Sensitivity analysis showed that the more reliable hydraulic version of our ET estimation technique is most sensitive (i.e., linearly) to the laboratory- and/or slug-test derived values of the saturated hydraulic conductivity and specific yield taken from the riparian zone.