地理科学进展 ›› 2005, Vol. 24 ›› Issue (3): 25-33.doi: 10.11820/dlkxjz.2005.03.004

• 土地利用 • 上一篇    下一篇

流域LUCC水文效应研究中的若干问题探讨

万荣荣1,2, 杨桂山1   

  1. 1. 中国科学院南京地理与湖泊研究所, 南京 210008|
    2. 中国科学院研究生院, 北京 100039
  • 收稿日期:2005-01-01 修回日期:2005-04-01 出版日期:2005-05-25 发布日期:2005-05-25
  • 作者简介:万荣荣(1977~),女,安徽省肥东人,博士研究生,主要从事自然资源与环境研究。 E-mail: wanrongrong@sohu.com
  • 基金资助:

    中国科学院知识创新重要方向性项目(KZCX3-SW-331)。

Discussion on Some Issues of Hydrological Effects of Watershed Land Use and Land Cover Change

WAN Rongrong1,2, YANG Guishan1   

  1. 1. Nanjing Institute of Geography &|Limnology, CAS, Nanjing 210008, China|
    2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2005-01-01 Revised:2005-04-01 Online:2005-05-25 Published:2005-05-25

摘要:

随着全球变化研究的深入,土地利用/覆被变化(LUCC)的水文效应研究日益成为热点问题。综合国内外研究进展,论文就流域土地利用/覆被变化水文效应研究中的几个问题进行了总结和探讨:子流域和水文响应单元是分布式水文模型对流域基本空间单元的理想划分;对国内外现有的土地利用分类系统进行了适当的调整和归并,建立了基于水文响应研究的土地利用分类系统,将土地利用分为9个Ⅰ级类和21个II级类;土地利用/覆被变化情景分析的常用方法有参照对比法、历史反演法、模型预测法、极端土地利用法、土地利用空间配置法等。

关键词: LUCC, 情景分析, 水文响应单元, 水文效应, 土地利用分类

Abstract:

With the research on global change deepening, hydrological effects of Land-use and Land-cover change (LUCC) are becoming the focus of attention. Based on the progress in the study on hydrological effects of watershed land use and land cover change, some issues are summarized and discussed. Spatially distributed or semi-distributed hydrological models have important applications in the interpretation and prediction of the effects of land use change. Considering the spatial variation of precipitation and land surface characteristics, the precondition of distributed hydrological model is to partition a watershed into many non-nesting units. There are four methods to delineate watershed units: partitioning watershed by precipitation gages, partitioning watershed into rectangle grids, partitioning a watershed into ‘homogeneous’ units known as hydrologic response units, HRU, by physical characteristics, and partitioning watershed into sub-watershed by divides. Sub-watersheds and hydrological response units, HRU, are preferred units in distributed hydrological model. The land use and land cover classification system based on hydrological response is established by means of adjusting and merging existing classification. There are 9 level-Ⅰcategories and 21 level-II categories in the land use and land cover classification system. Level-Ⅰcategories include arable land, grass land, forest land, orchard, shrub, water, built-up land, barren land and wetland .The methods of setting up land use and land cover change scenarios include paired contrast, historical speculation, modeling forecast, extreme land use and land use spatial allocation, etc.

Key words: hydrological effects, hydrological response units (HRU), land use and land cover change, land use and land cover classification, scenario analysis