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Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis

WANG Peifa DU Jinkang FENG Xuezhi KANG Guoding

WANG Peifa, DU Jinkang, FENG Xuezhi, KANG Guoding. Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis[J]. 中国地理科学, 2006, 16(4): 320-326.
引用本文: WANG Peifa, DU Jinkang, FENG Xuezhi, KANG Guoding. Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis[J]. 中国地理科学, 2006, 16(4): 320-326.
WANG Peifa, DU Jinkang, FENG Xuezhi, KANG Guoding. Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis[J]. Chinese Geographical Science, 2006, 16(4): 320-326.
Citation: WANG Peifa, DU Jinkang, FENG Xuezhi, KANG Guoding. Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis[J]. Chinese Geographical Science, 2006, 16(4): 320-326.

Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis

基金项目: Under the auspices of the National Natural Science Foundation of China(No.40171015)
详细信息
    作者简介:

    WANG Peifa(1980- ),male,a native of Changqing of Shandong Province,Ph.D.candidate,specialized in GIS and RS applications.E-mail:wangpeifa1980@163.com.

Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis

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出版历程
  • 收稿日期:  2006-05-15
  • 修回日期:  2006-09-20
  • 刊出日期:  2006-12-20

Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis

    基金项目:  Under the auspices of the National Natural Science Foundation of China(No.40171015)
    作者简介:

    WANG Peifa(1980- ),male,a native of Changqing of Shandong Province,Ph.D.candidate,specialized in GIS and RS applications.E-mail:wangpeifa1980@163.com.

摘要: TOPMODEL,a semi-distributed hydrological model,has been widely used.In the process of simulation of the model,Digital Elevation Model(DEM) is used to provide the input data,such as topographic index and distance to the drainage outlet;thus DEM plays an important role in TOPMODEL.This study aims at examining the impacts of DEM uncertainty on the simulation results of TOPMODEL.In this paper,the effects were evaluated mainly from quantitative and qualitative aspects.Firstly,DEM uncertainty was simulated by using the Monte Carlo method,and for every DEM realization,the topographic index and distance to the drainage outlet were extracted.Secondly,the obtained topographic index and the distance to the drainage outlet were input to the TOPMODEL to simulate seven rain-storm-flood events,and four evaluation indices,such as Nash and Sutcliffe efficiency criterion(EFF),sum of squared residuals over all time steps(SSE),sum of squared log residuals over all time steps(SLE) and sum of absolute errors over all time steps(SAE) were recorded.Thirdly,these four evaluation indices were analyzed in statistical manner(minimum,maximum,range,standard deviation and mean value),and effect of DEM uncertainty on TOPMODEL was quantitatively analyzed.Finally,the simulated hydrographs from TOPMODEL using the original DEM and realizations of DEM were qualitatively evaluated under each flood cases.Results show that the effect of DEM uncertainty on TOPMODEL is inconsiderable and could be ignored in the model's application.This can be explained by:1) TOPMODEL is not sensitive to the distribution of topographic index and distance to the drainage outlet;2) the distri-bution of topographic index and distance to the drainage outlet are slightly affected by DEM uncertainty.

English Abstract

WANG Peifa, DU Jinkang, FENG Xuezhi, KANG Guoding. Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis[J]. 中国地理科学, 2006, 16(4): 320-326.
引用本文: WANG Peifa, DU Jinkang, FENG Xuezhi, KANG Guoding. Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis[J]. 中国地理科学, 2006, 16(4): 320-326.
WANG Peifa, DU Jinkang, FENG Xuezhi, KANG Guoding. Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis[J]. Chinese Geographical Science, 2006, 16(4): 320-326.
Citation: WANG Peifa, DU Jinkang, FENG Xuezhi, KANG Guoding. Effect of Uncertainty of Grid DEM on TOPMODEL:Evaluation and Analysis[J]. Chinese Geographical Science, 2006, 16(4): 320-326.

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