中文摘要：

研究了自相似河网模型的发生元构成,提出用符号代码标识RSN的初始元和发生元,这种代码依据三个参数：河网的价、发生的元节点数、外链分叉夹角。给出了由此代码计算地貌特征的流程图。采用四种常用内链和外链发生元作为发生元,利用模拟流域基于宽度函数的地貌瞬时单位线为优化目标生成RSN,并计算其地貌特征。

英文摘要：

In this paper, a serf-similar river networks model was put forward, which uses string codes to identify the original unit and the. generator unit of RSN （Random Self-similar River Network）. These string codes are consist of four parameters： the river networks price, the node number in generator unit, the angle between adjacent chains, and the probability of replacement of generator unit. Set the basic part of limit distribution of water system as the generator unit, and then use the Width Function 0~F） of RSN to construct a Geomorphologic Instantaneous Unit Hydrograph （GIUH） based on WF, which is used to simulate hydrological response.