地理学报 ›› 1987, Vol. 42 ›› Issue (3): 269-278.doi: 10.11821/xb198703009

• 论文 • 上一篇    

一个计算山地地形参数的计算机模式

李占清1, 翁笃鸣2   

  1. 1. 北京气象中心
    ;2. 南京气象学院
  • 出版日期:1987-07-15 发布日期:1987-07-15

A COMPUTER MODEL TO DETERMINE TOPOGRAPHIC PARAMETERS

Li Zhanqing1, Weng Doming2   

  1. 1. Stale Meteorological Administration;
    2. Nanjing Institute of Meteorology
  • Online:1987-07-15 Published:1987-07-15

摘要: 本文提出了一个虚拟次网格二维差分格式,依此建立了一个计算山地小地形参数(即局地平均坡向、坡度和地形遮蔽角)的通用计算机模式。模式的输入参数为研究地区的拔海高度网格化后的资料、空间格距和网格点数;模式的输出结果为每个格点上的坡向、坡度及沿任一方位上的地形遮蔽角以及一些地形统计值。由此,可较准确、客观地制作出研究山区的坡向、坡度图和地形遮蔽图。经实测验证,模式的计算值与实测值比较吻合。

关键词: 地形参数, 坡度, 坡向, 地形遮蔽角

Abstract: We put forword a two-dimensional fictitious sub-network difference scheme first. Based upon it, a computer model is developed to determine topographic parameters including slope, azimuth and screening angle caused by the surrounding terrains at every grid point in mountainous areas, from which the distribution maps of slope and terrain pattern and screening figure can be easily made. The input parameters of the model are altitude data at every grid point derived from the contour map, grid space and number. The grid space may vary according to the contour map scale and uneven degree of the terrains in mountainous areas under study. The test made in the pan of dabie Mountains manifests that the computed values of these parameters are generally consistent with observed ones.

Key words: Topographic parameter, Slope, Azimuth, Screening angle