摘要
介绍了WSS权重系数法推求普通kriging的理论半变异函数模型参数，并将这种方法应用到滦河流域月降雨空间变异性研究中，然后采用交叉验证法检验了kriging法的插值效果。根据计算结果分析可知，各月变程变化范围较大，其中8月份变程最大，为178km，说明该月降雨空间变异性最小。同时，各个月份的C0/（C0＋C1）比值范围在0～23．08％之间，这表明滦河流域降雨量具有较强的空间相关性。
This paper presents the weighted sum of squares （WSS） technique for parameter identification of the semi-variation function of ordinary Kriging method, and technique is applied in the analysis of spatial variability of monthly rainfall in the Iman River basin. Cross validation is adopted to examine the interpolation precision of ordinary kringing method. From the final parameters attained, it is indicated that the ranges of precipitation variation in each month in the studied time series varies greatly. The range of the variation in August is up to 178 rnm, which is the maximal, and this indicates that the spatial variability of this month is the minimum. All the value of spatial variability is between zero and 23. 08%, which indicates that the rainfall in Luan River basin has stronger spatial correlation.
出处
《中国农村水利水电》
北大核心
2006年第10期28-30,共3页
China Rural Water and Hydropower
基金
湖北省自然科学基金资助(2004ABA007)
