| 徐海芳,郭建青,郑丽萍,刘恩民.鲁西北黄泛区农田土壤稳定入渗率空间变异性分析[J].干旱地区农业研究,2007,(6):132~135 |
| 鲁西北黄泛区农田土壤稳定入渗率空间变异性分析 |
| Spatial variability of soil steady water infiltration rate in Huangfanqu of Northwest Shandong Province |
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| DOI：10.7606/j.issn.1000-7601.2007.06.27 |
| 中文关键词: 稳定入渗率 空间变异性 变差函数 相关距离 |
| 英文关键词:steady water infiltration rate spatial variability variogram correlation scale |
| 基金项目:中国科学院禹城综合试验站开放基金课题(2002-6) |
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| 中文摘要: |
| 以中科院禹城综合试验站102 m×52 m空间的农田表层土壤入渗试验为基础,通过对实测数据的统计得到该地块的表层土壤稳定入渗率fc具有较大的空间变异性,并服从对数正态分布。应用变差函数对fc的空间结构进行分析,发现fc的空间结构可用指数变差函数模型进行描述,拟合模型所得到的方差值与试验结果的统计值基本相近,其相关距离为23.98 m;最后利用了Kriging最优内插估值法,绘制了fc的空间等值分布图。 |
| 英文摘要: |
| Based on the infiltration tests of farmland in Yucheng experimental station, the statistical analysis of measured data indicated that there is a large variability of the steady water infiltration rate fc, and it submitted to lognormal distribution.Exponential variogram model is used for the simulation of the spatial distribution of fc.The simulation result shows that the variance from the model is very close to the statistical value from the experimental data, and the correlation scale is 23.98m;fc spatial distribution over the entire plot area is estimated by using the Kriging interpolation technique. |
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