改进的无作物潜水蒸发经验公式

Abstract

Abstract: The undisturbed concretion black and sandy loam soil samples in the Wudaogou (Anhui Province, China) were selected to study the subsurface evaporation-filtration experimental system of the hydrology and water resources. Based on the observation data of phreatic water evaporation from 1992 to 1994 at this site, the relationships between phreatic water evaporation and influencing factors, and the relationships between the phreatic water evaporation coefficient and water surface evaporation were analyzed for bare lands. Based on the above analyses, the goodness of curve fitting of existed empirical formulas such as Ye Shuiting formula and Aviriyanover formula were tested and analyzed by using a nonlinear least squares algorithm, and the improved empirical formulas were developed. The results show that the fitting and prediction results of the improved formulas are much better than the existed formulas, and there is only one parameter to be determined in the improved formulas.

Key words: bare land, phreatic water evaporation, improved empirical formula, nonlinear regression, soils

CLC Number:

P641.132

Shu Long-cang, Jing Yan-dong, Huang Xiu-dong, Yu Zhong-bo, Wang Zhen-long. On the Development of Improved Empirical Formulas for Calculating the Phreatic Water Evaporation for Bare Land[J].Journal of Jilin University(Earth Science Edition), 2012, 42(6): 1859-1865.

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On the Development of Improved Empirical Formulas for Calculating the Phreatic Water Evaporation for Bare Land

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