摘要
雨量站网通常采用插值法获取降水空间分布信息,但在气象站点分布不均,海拔落差大的复杂山区,普通插值法插值结果精度较低.针对复杂山区,应在普通插值方法的基础上加入高程等地形因素.以我国新疆天山山区及周边44个气象站点57年(1958~2015)的平均年降水量和平均季度降水数据为基础,采用克里金插值法、样条函数插值法、反距离权重插值法、考虑高程的反距离权重插值法以及考虑高程的协同克里金插值法5种方法进行空间降水插值,选用36个为插值站点,8个为检验站点,通过相对误差和均方根预测误差为指标对插值结果进行检验,研究不同插值方法对天山山区降水插值结果精度影响.结果表明:采用混合插值的考虑高程的反距离权重法与考虑地形因素的协同克里金法的插值结果与实际情况较为一致.
Interpolation method is usually used to obtain spatial distribution information of precipitation by rainfall station network, but in the complex mountainous areas with uneven distribution of meteorological stations and large altitude drop, the interpolation results of ordinary interpolation methods have lower accuracy. In view of the complex mountainous area, terrain factors such as the elevation should be added on the basis of ordinary interpolation method. Based on the average annual precipitation and average seasonal precipitation data of 44 weather stations in Tianshan Mountains and its surroundings from 1958 to 2015, five methods of Kriging interpolation, spline interpolation, inverse distance weight interpolation, inverse distance weight interpolation considering elevation and collaborative Kriging interpolation considering elevation are used for spatial precipitation interpolation. 36 interpolation sites and 8 inspection sites are selected. The relative error and root mean square prediction error are used as indicators to test the interpolation results and study the effect of different interpolation methods on the accuracy of the precipitation interpolation results in the Tianshan Mountains. The results show that the interpolation results of the inverse distance weighting method with mixed interpolation and the coordinated Kriging method with terrain factors are more consistent with the actual situation.
作者
吴晓燕
高敏华
李艳艳
WU Xiaoyan;GAO Minhua;LI Yanyan(.College of Resource and Environment Sciences,Xinjiang University,Urumqi,Xinjiang 830046,China;The Ministry of Education Key Laboratory of Oasis Ecology,Xinjiang University,Urumqi,Xinjiang 830046,China)
出处
《湖南城市学院学报（自然科学版）》
CAS
2020年第2期28-31,共4页
Journal of Hunan City University:Natural Science
关键词
降水
空间插值
复杂山区
天山山区
precipitation
spatial interpolation
complex mountainous areas
Tianshan Mountains
