水利水电科技进展2016，Vol.36Issue(3)：16-19,51,5.DOI:10.3880/j.issn.1006-7647.2016.03.004
非连续河道地形插值方法的比选
Comparison of different methods for interpolation of topography of discrete rivers
摘要
Abstract
According to the actual situation in which the cross-sectional topographic data are discontinuous for hydrodynamic and aquatic environmental simulations, topographic interpolations for strongly curved reaches, river confluence, and braided rivers were conducted with the triangular mesh method, inverse distance weighting method, and Kriging method using the Huangpu River as an example. The reliability of these three interpolation methods was analyzed and compared. The results show that, for strongly curved reaches, river confluence, and braided rivers where topography varies significantly, the interpolation results of the triangular mesh method are unstable, with high errors and significant fluctuations, indicating that this method failed to reflect the actual topographic situation. The “buphthalmos” phenomenon may appear when the inverse distance weighting method is used. Compared with other methods, the Kriging method shows higher reliability. When fewer cross-sectional data are used, the results of the Kriging method show lower error and higher robustness than the other two methods. Based on the interpolation results of the topography of the Huangpu River with the above-mentioned three interpolation methods, a mathematical model was used to compare the tidal level processes, and the results show that the computational precision of the Kriging method is the highest.关键词
非连续河道/地形插值/三角网格法/反距离权重法/克里金法/黄浦江Key words
discrete river/topographic interpolation/triangular mesh method/inverse distance weighting method/Kriging method/Huangpu River分类
天文与地球科学引用本文复制引用
华祖林,王海燕,汪靓,王玉琳..非连续河道地形插值方法的比选[J].水利水电科技进展,2016,36(3):16-19,51,5.基金项目
国家自然科学基金(51379060,51179052) （51379060,51179052）
上海市水务局科研项目(2014-10) （2014-10）
