土壤调查数据地域统计的最佳估值研究-彰武县表层土全氮量的半方差图和块状Kriging估值
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OPTIMAL ESTIMATION OF SOIL SURVEY DATA BY GEOSTATISTICAL METHOD--SEMI-VARIOGRAM AND BLOCK KRIGING ESTIMATION OF TOPSOIL NITROGEN OF ZHANGWU COUNTY
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    摘要:

    近年来国际土壤应用数学和土壤信息系统的研究趋势之一,是引用地质统计(Geostatistics)的最佳估值法处理土壤调查的数据.地质统计是目前地质部门在探矿与采矿应用的一种先进空间分析方法,它的要点是根据地面不同选点钻井所获得的不同深度的数据资料、寻求数据信息与采样点的位置和采样深度的统计相关性来对矿产进行空间结构分析与数量估计.

    Abstract:

    Kriging is a method of estimating values of properties at places without bias and with minimum error from observed values in the neighbourhood.The method was applied to measurements of total nitrogen in the top layers of the soils in Zhangwu County in China.After transforming the measurements to logarithms to stabilize their variances,the semi-variogram was computed from them.The semi-variogram showed spatial dependence extending to 50 bm,although it had a large non-spatial,or "nugget" component.Mathematical models were fitted,and the one giving the best fit in a least square sense was used to estimate values and their estimation variances on a fine grid(1.25km) from which isorithmic maps of the county were drawn.

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徐吉炎,R.韦甫斯特.土壤调查数据地域统计的最佳估值研究-彰武县表层土全氮量的半方差图和块状Kriging估值[J].土壤学报,1983,20(4):419-430. Xu Jiyan, R. Webster. OPTIMAL ESTIMATION OF SOIL SURVEY DATA BY GEOSTATISTICAL METHOD--SEMI-VARIOGRAM AND BLOCK KRIGING ESTIMATION OF TOPSOIL NITROGEN OF ZHANGWU COUNTY[J]. Acta Pedologica Sinica,1983,20(4):419-430.

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  • 在线发布日期: 2013-02-25
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