摘要
为定量评估降雨空间分布不均匀程度,以史灌河流域为研究区选取48个雨量站1998年到1999年92场日降雨观测资料,首次提出降雨空间集中度概念,分析降雨空间集中度与面平均雨量、插值误差的关系。采用反距离权重法、局部多项式法、径向基函数法、普通克里金法以及协同克里金法对拟定的站点进行空间插值,并用相对平均误差评判插值结果的好坏,分析不同降雨空间分布下各种插值方法的优劣。
In order to quantitatively assess the uneven degree of spatial precipitation distribution,a subbasin of Shiguan River in Huaihe River Basin is selected as study object,and the daily rainfall observation data of total 92 events during 1998-1999 from 48 rainfall stations are used to analyze the relationship of concentration of spatial precipitation with mean surface rainfall and interpolation error,in which,the concept of concentration of spatial precipitation is firstly proposed.The methods of Inverse Distance Weighting Method,Local Polynomial Method,Radial Basis Function Method,Ordinary Kriging Method and Cokriging Method are used to interpolate rainfall observation data between stations and the mean relative errors between the interpolated and observed results are used to judge the interpolation results.The applicability of spatial interpolation methods under different spatial distribution of precipitation will be finally measured.
出处
《水力发电》
北大核心
2016年第6期14-17,38,共5页
Water Power
基金
国家自然科学基金重大项目资助(51190091)
关键词
降雨插值
降雨空间集中度
方法比较
相对平均误差
precipitation interpolation
concentration of spatial precipitation
method comparison
mean relative error
