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geomorphological parameter
相关语句
  相似匹配句对
     n—Parameter CAPM
     n个参数的资本性资产定价模型
短句来源
     Scattering Parameter
     散射参数
短句来源
     On geomorphological wave
     论地貌波
短句来源
     the geomorphological difference is clear;
     地貌差异显著;
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According to the characteristics of uneven spatial distribution of precipitation and runoff and sediment yield concentrated usually in a flood season of the three rivers of Tuwei, Kuye and Gushanchuan. an empirical model of annual occurrences of runoff yield and sediment transport has been established by using a method of taking the maximum precipitation, rainfall intensity and geomorphological parameters of time interval within each element area as a comprehensive index which effects the yield of runoff...

According to the characteristics of uneven spatial distribution of precipitation and runoff and sediment yield concentrated usually in a flood season of the three rivers of Tuwei, Kuye and Gushanchuan. an empirical model of annual occurrences of runoff yield and sediment transport has been established by using a method of taking the maximum precipitation, rainfall intensity and geomorphological parameters of time interval within each element area as a comprehensive index which effects the yield of runoff and sediment transport and accumulating finally as a general index. It is shown by the statistical results that the average relative error through comparing the calculated value of the model with the observed one is as follows: annual modulus of clear water is 0.69%~4.5%; annual modulus of muddy water is 0.2%~8.4%; and annum modulus of sediment transport is 0.05%~11.5%.

依据秃尾河、窟野河、孤山川三条河流域降雨时空分布极不均匀及产流输沙多集中汛期的特点,将流域分为若干单元,以各单元面积内的时段最大降雨、雨强、地貌参数为影响产流输沙综合指标,最后叠加成总指标的方法,建立了产流输沙次和年经验模型。统计结果表明,模型计算与实测值相比,平均相对误差分别为:年清水模数0.69%~4.5%;年浑水模数0.2%~8.4%;年输沙模数0.05%~11.5%。

Planation Surface is one of the very important issues in the field of current geomorphology, and plays a major role for reconstructing the evolutional history of land from in a region. By using remote sensing and geographical information systems, this article discussed the creation of the Digital Elevation Model (DEM) of the Meiwu Plateau, at the south of Lanzhou and the northeastern margin of the Qinghai-Xizang Plateau, and the integration of both DEM and Landsat TM images. Then the characteristics of 3D Geomorphological...

Planation Surface is one of the very important issues in the field of current geomorphology, and plays a major role for reconstructing the evolutional history of land from in a region. By using remote sensing and geographical information systems, this article discussed the creation of the Digital Elevation Model (DEM) of the Meiwu Plateau, at the south of Lanzhou and the northeastern margin of the Qinghai-Xizang Plateau, and the integration of both DEM and Landsat TM images. Then the characteristics of 3D Geomorphological Imagery of the Meiwu Plateau were discussed, and the topographic profiles at several parts of the DEM were got. On the basis of analyzing the system of geomorphological parameters on the planation surface, the exact extent of the planation surface on the Meiwu Plateau was got by using the supervised classification technique in the field of image processing. The great potential of this technique was discovered on the analysis of planation.

夷平面是当代地貌学研究的一个重要课题之一, 对于重建一个地区的地貌演化的历史具有重要的意义。文中利用遥感与地理信息系统技术, 建立了位于兰州以南、青藏高原东北部边缘的美武高原数字高程模型, 并与陆地卫星影像结合起来进行集成分析, 论述了美武高原三维地貌影像图的信息特点, 提取了若干区段的地形剖面, 进而在分析了高原夷平面地貌参数体系的基础上运用遥感图像监督分类技术自动提取出高原夷平面的具体分布区域,揭示了此项技术对于夷平面分析的巨大潜力

The computational mesh should represent the geometry, physical properties and boundary conditions of the computational domain in the flood simulation model. Based on the cell shape the computational mesh can be classified into regular mesh and irregular mesh. The generation of regular mesh is easy and simple, and as for irregular computational mesh hydrologists usually generated it manually. Due to structure and shape similarity, the automatic TIN generation algorithm can be used to generate the computational...

The computational mesh should represent the geometry, physical properties and boundary conditions of the computational domain in the flood simulation model. Based on the cell shape the computational mesh can be classified into regular mesh and irregular mesh. The generation of regular mesh is easy and simple, and as for irregular computational mesh hydrologists usually generated it manually. Due to structure and shape similarity, the automatic TIN generation algorithm can be used to generate the computational mesh for flood simulation model. The detailed flood model construction process based on GIS is to (1) delineate the computational domain; (2) generate computational mesh; (3) generate the mesh topology; and (4) extract the model parameters. The model parameters include boundary conditions, initial conditions, hydrological and geomorphological parameters and as well as other parameters for controlling the model simulation process. GIS technology can provide some spatial analytical tools for extracting some of these parameters such as the manning coefficient(roughness parameter) and calculating the average ground datum of internal point of every mesh unit and the mesh nodes, improve the capacity for defining the spatial sub-units of the computational domain and provide a better method to discrete the computational domain with enough amount of computational mesh with suitable geometry. In the river reach from Huayuankou to Jiahetan in the Huanghe River these maps of topography, landuse, water conservation engineering, hydrological observation station were used to construct the flood simulation model, and the data structure of the computational mesh is described in detail.

在复杂区域建立洪水模型时 ,计算网格的手工生成方法容易出错甚至不可行 ,自动生成算法则可大大节省计算网格生成的工作量。洪水模型中的计算网格与GIS栅格数据及不规则三角网空间数据结构非常相似 ,因此 ,GIS中成熟的网格自动生成算法可用于生成洪水模型计算网格。文章详细讨论了GIS支持下的洪水模型自动建立步骤 ,并以黄河下游花园口~夹河滩河段为例 ,利用地形图、土地利用图、水利工程设施分布、水文站点图等资料 ,通过自动生成网格及其空间拓扑关系 ,建立了洪水过程数值模拟模型 ,并详细解释了计算网格数据格式。

 
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