南京林业大学学报（自然科学版）2017，Vol.41Issue(4)：115-120,6.DOI:10.3969/j.issn.1000-2006.201603045
站点密度对复杂地形PRISM月降雨空间插值精度的影响
Effects of spatial station density on accuracy of spatial interpolation of monthly rainfall over complex terrain base on PRISM
摘要
Abstract
[Objective] Investigate the influence of station density on the accuracy of PRISM interpolation,in order to elucidatethe model's scope of application.[Method] Based on the DEM of the northwest mountains of Beijing and rainfall data from the mountain automatic weather stations to calculate the result of interpolation.These results were then compared with the IDW,Kriging and Spline interpolation models using cross validation and test data validation.[Result] The precision of interpolation was reduced when site density was reduced from 0.55× 10-2 to 0.18× 10-2 sites/km2 but was reduced most when using the PRISM model and least when using the Spline model.Furthermore,when the site density was reduced to 0.18× 10-2 sites/km2,the error of the PRISM model was less than that of the Spline model,but still greater than the Kriging and IDW models.[Conclusion] The present study suggests that the IDW and Kriging models should be used when stations are sparse.关键词
站点密度/坡面回归方程模型/降雨/空间插值/精度Key words
spatial stations density/PRISM/rainfall/spatial interpolation/precision分类
农业科技引用本文复制引用
蒋育昊,刘鹏举,夏智武,许等平,张英凯..站点密度对复杂地形PRISM月降雨空间插值精度的影响[J].南京林业大学学报（自然科学版）,2017,41(4):115-120,6.基金项目
国家高技术研究发展计划(2012AA102001-2) （2012AA102001-2）
