基于多水头稳态入渗的土壤参数求算方法研究  

Calculating Soil Infiltration Parameters Based on Many Steady-state Flow Heads

作　　者：任尚岗[1] 张振华[1] 刘继龙[2] 刘峰[3] 潘英华[1] 崔素芳[1] 李陆生[1] 

机构地区：[1]鲁东大学地理与规划学院,山东烟台264025 [2]东北农业大学水利与建筑学院,哈尔滨150030 [3]烟台市国土资源局牟平分局规划站,山东烟台2640252

出　　处：《灌溉排水学报》2011年第1期15-19,共5页Journal of Irrigation and Drainage

基　　金：国家自然科学基金(40801100)

摘　　要：基于单环入渗理论,推导出了多水头稳态入渗条件下土壤水入渗参数的求算方法,分析比较了双水头与多水头方法测量的入渗参数的差异。结果表明,多水头方法比双水头条件下获取的饱和导水率稳定性强、变异性弱,与多个双水头求算结果的均值十分接近;多水头下的测量结果与多个双水头均值有很好的线性相关性;双水头入渗中,积水深度相差10和15 cm与相差3、5或6 cm相比,测量结果的稳定性强、变异性弱,与多个双水头均值具有更好的相关性;多水头入渗与双水头相比测算的土壤入渗参数可在一定程度上减小试验误差,双水头试验中适当增加2个稳定入渗水头间的差距可提高测量精度。Based on single-ring infiltration theory,calculation of soil hydraulic properties based on many steady-state heads flow was derived,then the difference of soil hydraulic properties between two steady-state heads and many steady-state flow heads were studied.The results show that： compared with infiltration parameter measured from two steady-state heads,many steady-state heads measured had better stability and weaker variability,having the similar stability and variability with the mean of measured from two steady-state heads;the mean of two steady-state heads measured and many steady-state heads measured value has good linear relationship;In the two steady-state heads flow,the distance between two heads is 9,10 or 15 cm measured was more stability and weaker variability than 3,5 or 6 cm,and the linear relationship with the mean of them was better;compared with the two steady-state heads flow experiment,using many steady-state flow can lower measured error,In the two steady-state heads flow selecting more distance between two flow heads can increase measured accuracy.

关 键 词：多水头入渗 双水头入渗 饱和导水率 

分 类 号：S152.7[农业科学—土壤学]