自然资源学报

自然资源学报 ›› 2010, Vol. 25 ›› Issue (6): 1022-1032.doi: 10.11849/zrzyxb.2010.06.014

• 资源研究方法 • 上一篇    下一篇

DEM栅格分辨率对TOPMODEL模拟 不确定性的影响研究

林凯荣1,郭生练2,熊立华2,牛存稳3   

  1. 1. 中山大学 地理科学与规划学院, 广州 510275;
    2. 武汉大学 水资源与水电工程科学国家重点实验室, 武汉 430072;
    3. 中国水利水电科学研究院 水资源研究所, 北京 100044
  • 收稿日期:2009-10-19 修回日期:2010-03-25 出版日期:2010-06-30 发布日期:2010-06-30
  • 作者简介:林凯荣(1980- ),男,福建龙海人,博士,讲师,主要从事水文水资源方面的研究工作。E-mail:linkr@mail.sysu.edu.cn
  • 基金资助:

    国家自然科学基金项目(50809078、50839005);水资源与水电工程科学国家重点实验室开放基金项目(2008B043);中国水利水电科学研究院开放基金项目(IWHR02009003);中山大学青年教师培育项目。

The Impact of DEM Resolution on TOPMODEL Simulation Uncertainty

LIN Kai-rong1,GUO Sheng-lian2,XIONG Li-hua2,NIU Cun-wen3   

  1. 1. School of Geographical Science and Planning, Sun Yat-sen University, Guangzhou 510275, China;
    2. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;
    3. China Institute of Water Resources and Hydropower Research, Beijing 100044, China
  • Received:2009-10-19 Revised:2010-03-25 Online:2010-06-30 Published:2010-06-30

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被引次数

33 | 3

摘要：

选择南水北调水源区所在的汉江流域的3个不同地貌类型的子流域为试验流域,采用1:5万比例尺DEM为基准数据,基于以地形为基础的半分布式流域水文模型TOPMODEL,研究栅格分辨率对水文模拟不确定性的影响,并利用多目标模糊优化算法,对水文模拟的不确定性进行了综合评价。结果表明,DEM栅格分辨率对地形特征和地形指数都有很大的影响,从而影响水文模拟的不确定性,但由于水文模拟的复杂性在一定程度上掩盖了不同DEM分辨率计算的地形指数的差别,使得这种影响不是很大。对于现有试验流域而言,当分辨率为200 m的时候可以得到相对较优的不确定性预测区间。

关键词: 水文学及水资源, DEM分辨率, TOPMODEL

Abstract:

The hydrological uncertainty is one of the most important aspects in hydrological science research. This paper focuses on how resolution impacts the hydrological uncertainty using the TOPMODEL model based on the topographic index, which extracts from DEMs of different resolutions in the Hanjiang River. Three geomorphologic areas are selected as test areas, representing different terrain types from smooth to rough. Their DEMs are produced from digitizing contours of 1∶50000 scale topographical maps. Hydrological uncertainty was assessed synthetically by using the multiple-objectives fuzzy optimal method. It is found from the analysis on different spatial resolutions that the topographic characteristics parameters of river basin are affected by DEM resolution remarkably, so as to affect the hydrological uncertainty, but this effect is not very great due to the hydrological complexity, and 200 m should be the more suitable grid size for hydrological uncertainty in this area. The integrated method of assessing hydrological uncertainty is a new throughway to study the various hydrological uncertainties.

Key words: hydrology and water resources, DEM resolution, TOPMODEL

中图分类号: 

  • P333.9