摘要
通过野外布点试验,运用地统计学方法,研究了禹城市农田土壤稳渗率的空间分布,结果表明:稳渗率具有较大的空间变异性,服从对数正态分布。空间结构可用球状变差函数模型进行描述。地表层与犁底层稳渗率的相关距离分别为23.7m和17.2m。利用克里格法绘制了稳渗率的等值线图。
The spatial variability of the steady infiltration rate was studied by geo-statistics method in this paper.The results showed that the steady infiltration rate had larger spatial variability and submitted to lognormal distribution.According to geo-statistical method,the spatial structures of the steady infiltration rate can be characterized by the spherical variogram function model.The correlation scales of the steady infiltration rate in surface stratum and the plough pan were 23.7 m and 17.2 m,respectively.In the end,the Kriging interpolation technique was used to estimate the steady water infiltration rate spatial distribution over the entire plot area.
出处
《节水灌溉》
北大核心
2011年第4期18-20,共3页
Water Saving Irrigation
基金
中国科学院知识创新工程重要方向性项目(KZCX3-SW-428)
中国科学院"引出海外杰出人才"项目
中国科学院禹城综合试验站开放基金课题
关键词
空间变异
变异函数
稳渗率
相关距离
spatial variability
variation function
steady infiltration rate
correlation scale
