地理科学进展 ›› 2002, Vol. 21 ›› Issue (2): 139-145.doi: 10.11820/dlkxjz.2002.02.006

• 论文 • 上一篇    下一篇

基于GIS的小流域地块单元划分与汇流网络计算

刘高焕, 刘俊卫, 朱会义   

  1. 中国科学院地理科学与资源研究所,北京100101
  • 收稿日期:2002-02-01 修回日期:2002-02-01 出版日期:2002-03-24 发布日期:2002-03-24
  • 作者简介:刘高焕(1959-),男,研究员。主要从事区域可持续发展信息系统研究。E-mail:liugh@lreis.ac.cn
  • 基金资助:

    973资助项目(1999043508);中科院地理科学与资源所领域前沿项目(XIOG-D00-04)

Land-unit Based Flow Network Model in Small Catchment with GIS Support

LIU Gao huan, LIU Jun wei, ZHU Hui yi   

  1. Institute of Geographical Sciences and Natural Resources Research,CAS, Beijing 100101 China
  • Received:2002-02-01 Revised:2002-02-01 Online:2002-03-24 Published:2002-03-24

摘要: 地块单元是小流域生态环境建设与管理的基本空间单元 ,探讨地块尺度的水沙运移关系对强化小流域空间管理具有显著的理论与实践意义。

关键词: 地块单元, 汇流网络, 水土保持

Abstract: Land unit is the basic unit in soil erosion management and ecological environment construction. To understand the roles of water and sand movement among the land units is significant in spatial management of small basins. The land unit is defined as a piece of land with homogeneous geographic characteristics. Within a land unit, the elevation, slope, aspect, soil type or soil texture, landuse or landcover are same or similar. It is now becoming much important in land planning and land management. This paper described the characters and functions of land unit. Based on geographic information system, the methods for land unit dividing, parameters organization, and attribute extraction were expatiated. To meet with the needs of soil erosion model, land productive model and socio economic model, which are main models developed for soil and water conservation measures, a mathematical model for calculating flow network among land units in small catchment was developed. The data set used in the model was grid format elevation data and land unit data layer. The model result was a relation table which shows flow structure of water and sand movement among land units. The flow network relation table then was connected with the erosion model to give out the flow sequence of erosion process.

Key words: flow network, Land unit, soil and water conservation

中图分类号: 

  • P208