A Expanded Binary Tree Method of Automatic River Coding and Algorithm

As the tree morphological characteristics of river-net, binary tree code cannot reflect the tributary and main bifurcation of river, the binary tree coding method is expanded, which some problem of the tributary and main bifurcation of river and the topological structure is solved and the usability of river coding is also improved, by discussing the key technology and coding method of the reaches and nodes between the reaches and establishing the topological structure of river. Generating geometric network with the network model of ArcGIS Geodatabase, the expanded river coding method is applied to Xiangjiang River basin, and the platform of rivers visualization and automation coding has been realized by using ArcGIS Engine and C#, so that the pollution sources tracking has a hydrological data foundation.