降雨空间插值方法的比较与改进

Comparison and improvement of spatial rainfall interpolation methods

对几种常用的降雨空间插值方法,如泰森多边形法、距离平方倒数法、克里金方法的优缺点进行了分析和比较.考虑到高程对降雨量影响较大,在协克里金方法的基础上将高程作为第2类影响因素引入降雨量的空间插值方法中,并提出了引入高程信息的协克里金方法.将3种方法(距离平方倒数法、普通克里金方法、引入高程信息的协克里金方法)用于沿渡河流域降雨量的插值计算,结果表明,考虑高程信息的协克里金方法的插值效果明显优于其他2种方法.

A comparison was made on several spatial rainfall interpolation methods commonly used, including the Thiessen polygon method, the reverse distance weighting method and the ordinary Kriging method. In consideration of great influences of the elevation information, it was taken as an influencing factor of the second class, and introduced into the Co-Kriging method for spatial rainfall interpolation, and a new Co-Kriging method was put forward. The application of the three methods, the reverse distance weighting method, the ordinary Kriging method and the new Co-Kriging method, to rainfall interpolation calculation for the Yanduhe River Basin shows that the effect of the last one is obviously superior to the other two methods.