基于网络图论的黄土模拟小流域水系演化研究  

Research on Simulated Loess Watershed Based on the Network Graph Theory

作　　者：陈世莉[1] 罗明良[2] 王春[3] 崔灵周[4] 

机构地区：[1]中山大学地理科学与规划学院,广州510275 [2]西华师范大学国土资源学院,四川南充637009 [3]滁州学院国土信息工程系,安徽滁州239000 [4]温州大学生命与环境科学学院,浙江温州325035

出　　处：《地球与环境》2013年第5期542-546,共5页Earth and Environment

基　　金：国家自然科学基金(41101348);四川省科技厅应用基础研究项目(2010JY0089);四川省教育厅自然科学重点项目(09ZA120)联合资助

摘　　要：河网形态对土壤侵蚀、河流演变等有较大影响。为描述黄土模拟小流域的河网的网络特征,采用人工降雨实验获取的黄土模拟小流域高解析度DEM数据,计算了不同时期沟谷节点平均连接度及网络结构熵,划分了模拟流域的不同发育阶段。研究表明节点平均连接度侧重度量沟谷形态特征,与坡度等因子相关;而结构熵则侧重定量沟谷发育过程,与主沟道纵剖面变化相关。River morphology has great influence on both soil erosion and river evolution. To describe simulated loess watershed network characteristics, we made artificial rainfall simulation experiments to obtain high resolution DIeM data for the small lo ess watershed, calculate valley node mean connectivities and network structure entropies in different periods, and divide differ- ent development states of the simulated basin. Research indicates that the node mean connectivity puts the focus on gully mor- phological features and their relationship with the slope factor. And structure entropy is focused on the quantitative gully devel- opment process and has no relationship with the main channel profile change.

关 键 词：小流域 GIS DEM 网络结构熵 

分 类 号：P931.1[天文地球—自然地理学]