长江流域资源与环境 >> 2007, Vol. 16 >> Issue (5): 661-661.

• 生态环境 • 上一篇    下一篇

基于栅格产汇流的TOPMODEL

吴 波1| 张万昌1,2*   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-09-20

GRID BASED TOPMODEL FOR RUNOFF PRODUCTION AND ROUTING

WU Bo1, ZHANG Wanchang1|2   

  • Received:1900-01-01 Revised:1900-01-01 Online:2007-09-20

摘要:

经典的TOPMODEL产汇流演算原是建立在子流域单位基础上的半分布式水文模型。考虑到流域地形、下垫面条件及流域气象条件的空间差异性,将TOPMODEL的产流计算细化到每个栅格,以改进模型的分布式计算,并在考虑地形坡度影响的情况下,根据降水-径流资料优选出的参数率定等流时线、利用率定的等流时线进行流域的汇流计算,以提升TOPMODEL在中、大尺度流域模拟演算的能力。使用改进后的模型在两河口流域(2 818 km2)以精度60 m的数字高程模型栅格网为基础,配合气象数据和水文资料对径流流量进行日模拟,模拟精度达到70%左右,进一步的分析认为该模型仍有较大的改进空间。

关键词: TOPMODEL, 等流时线, 数字高程模型(DEM), 两河口流域

Abstract:

Some improvements have been made to the original TOPMODEL,a semidistributed hydrological model based on subcatchment scale,with the consideration of the spatial variability of topography,underneath conditions and watershed climate.Significant improvements to the TOPMODEL were made on the distributed computation of runoff yield in the mesh scale which is equivalent to that of DEM in one hand,and an isochrones hydrograph was calibrated from rainfallrunoff observations for watershed convergence simulations on the other hand.These improvements were made to enhance the simulation ability of the TOPMODEL,meanwhile to extend the model′s adoptability in rainfallrunoff simulations to middle and large scale watersheds.The improved TOPMODEL were used in Lianghekou basin (2 818 km2) to simulate daily volume of runoff in this catchment,and a satisfactory simulation result with 70% or so in prediction precision was achieved.Further analysis on this model suggested that there were still ample rooms remained for further advancements.

Key words: TOPMODEL, Isochrones Hydrograph, DEM, Lianghekou Basin

[1] 凌, 峰, 杜, 耘, 肖, 飞, 吴胜军, 薛怀平. 分布式TOPMODEL模型在清江流域降雨径流模拟中的应用[J]. 长江流域资源与环境, 2010, 19(01): 48-.
[2] 徐新良, 庄大方, 贾绍凤, 胡云峰. GIS环境下基于DEM的中国流域自动提取方法[J]. 长江流域资源与环境, 2004, 13(4): 343-348.
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