【摘要】 根据安徽省五道沟水文水资源实验站砂姜黑土和砂壤土2种原状土样1992—1994年的潜水蒸发实验观测数据,在分析无作物条件下潜水蒸发与各种影响因素关系、潜水蒸发系数与水面蒸发关系的基础上,采用非线性最小二乘法,以决定性系数、残差均值和方差为性能指标,对已有的潜水蒸发经验公式——阿维里扬诺夫公式和叶水庭公式进行了非线性回归拟合优度比较,并提出了2个公式的改进形式。结果表明,采用改进后的经验公式进行潜水蒸发的拟合和预测,较原有公式精度有明显提高。更多还原

【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.更多还原