摘要
为实现子流域划分、编码过程中多汇流编码并达到加密无分叉河段的要求,提出一种新型的子流域编码规则——干支拓扑编码规则。它以河网干支流拓扑关系为基础,采用层次继承式编码规则,从流域出口逆流而上逐个对子流域进行编码。该编码规则能确保上游子流域编码始终包含下游编码信息,从而实现上下游拓扑关系运算。渭河流域应用实例表明,干支拓扑编码规则符合单向流不规则树状结构编码要求,能实现单枝结构、二叉结构以及多叉结构的拓扑编码。
A new rule for sub-watershed codification is put forward to realize sub-watershed division and multi-confluence codification and to split a non-bifurcated river into small parts.This rule,which is called stem-branch topological codification（SBTC）,is developed based on the stem-branch topological relationship of drainage networks.The SBTC codes the drainage networks from the river mouth to the source,and uses the hierarchical inheritance rule to reflect the upstream and downstream topological relationship.The application of the rule to the Weihe Basin shows that the SBTC is competent for the coding of anomaly-simulated dendritic drainage networks,which have one-way,two-way,and multi-way confluence situations.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第4期288-293,共6页
Journal of Hohai University(Natural Sciences)
基金
国家"十一五"科技支撑计划(2010BAC69B02)
国家自然科学基金(50939006
51179203
51021006)
国家重点基础研究发展计划(973计划)(2006CB403404)
关键词
干支流拓扑关系
干支拓扑编码规则
子流域编码
继承式编码规则
渭河流域
stem-branch topological relationship
stem-branch topological codification
sub-watershed codification
inherited codification rule
weihe Basin
