| 基于GIS的土壤盐分空间变异及盐分监测样点合理布设研究 |
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| 引用本文： | 杨奇勇,杨劲松.基于GIS的土壤盐分空间变异及盐分监测样点合理布设研究[J].灌溉排水学报,2011,30(2):10-14. |
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| 作者姓名： | 杨奇勇 杨劲松 |
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| 作者单位： | 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 中国科学院知识创新工程重大项目，公益性行业(农业)科研专项经费项目，国家自然科学基金项目，国家科技支撑计划项目课题，国家863计划重点项目课题 |
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| 摘 要： | 在GIS技术支持下,采用经典统计学和地统计学方法对山东省房寺镇0～20 cm土壤盐分空间变异及其监测合理采样数量进行了研究.结果表明,研究区域土壤盐分属中等强度变异,受结构因素和随机因素的共同作用,土壤盐分具有中等强度的空间相关性;Kriging插值分析表明,土壤盐分的空间分布受微地形、气候和河流水入渗的影响,在地势较...
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| 关 键 词： | GIS Kriging插值 合理取样数 空间变异 |
Spatial Variability and Optimization of Observation Sampling for Soil Salinity by GIS |
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| YANG Qi-yong,YANG Jing-song.Spatial Variability and Optimization of Observation Sampling for Soil Salinity by GIS[J].Journal of Irrigation and Drainage,2011,30(2):10-14. |
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| Authors: | YANG Qi-yong YANG Jing-song |
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| Abstract: | With the sustain of GIS,spatial variability and appropriate sampling quantity for depth soil lay of 0~20 cm was measured and analyzed by using statistics and geo-statistics in Fangsi Town of Shandong province.The results showed that soil salinity exhibited moderate spatial variation and moderate spatial autocorrelation resulting from compound impact of structural and stochastic factors.The spatial distribution map of soil salinity interpolation by Kriging interpolation indicated apparently that the spatial distribution of soil salinity was mostly controlled by micro-topography,climatic and river running water infiltration,and soil salinity content of the lower spot was higher.Analysis on the appropriate sampling quantity for salinity observation,which was determined by using Cochran and distributed sampling methods respectively,showed that distributed sampling methods could reduce the appropriate sampling quantity effectively,the appropriate sampling quantity for rational distributed sampling was the most reasonable and practical.The rational sampling quantity for available soil salinity would be 40 under 95% significant level and 15% relative error in the study area. |
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| Keywords: | GIS |
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