基于栅格单元优化的多要素辅助的空间插值方法研究A Multi-factor Assisted Spatial Interpolation Method Based on Grid Optimization
于金羽,徐佳伟,刘伟
摘要(Abstract):
对于土壤属性空间分异显著的复杂地貌类型区,常规的全局插值模型和单一环境要素辅助的插值模型往往难以满足插值精度的要求。鉴于此,以青海湖流域部分区域为实验区,开展了多地学要素辅助的土壤钾含量空间插值方法研究。经验证,基于栅格单元优化的多地学要素辅助的土壤钾含量空间插值精度有显著提高,均方根误差(root mean square error,RMSE)降低约50%,对土壤钾含量空间分异特征的刻画也更为细致。该方法可以解决单一插值模型在空间预测中的不足,对复杂地学环境中土壤属性的空间变异刻画表现良好。
关键词(KeyWords): 普通克里金法;空间插值;土壤钾;栅格单元
基金项目(Foundation): 国家自然科学基金青年科学基金(41601405)
作者(Author): 于金羽,徐佳伟,刘伟
DOI: 10.14188/j.2095-6045.2020383
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