摘要
在分析大量田间波涌灌入渗实验基础上，对黄土区土壤波涌灌得到了一些有趣的结果，证明了波涌灌灌水循环率存在最佳值．在放水时间１８—４５ｍｉｎ之间时，最优循环率都在１／３左右。另对Ｋｏｓｔｉａｋｏｖ系数ｋ，α与代表水分运动有关的土壤物理属性──容重ｒｄ和土壤物理性粘粒含量λ的相关分析表明，灌水过程中表土容重的变化是入渗率减小的主要原因。
Based on a large number of field experiments under surge irrigation on the loess region, we obtain some interesting results including:(1)the existence of an optimized cycle ratio which is about 1/3 under the infiltration on-time between 18-45min; (2) the good covariance between the Kostiakov coefficients K,αand rd and λ which show that the decrease of infiltration under surge irrigation is mainly due to the increase of surface soil bulk density.
出处
《西北水资源与水工程》
1994年第2期20-26,共7页
Northwest Water Resources & Water Engineering
