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A Set of GRASS GIS-Based Shell Scripts for the Calculation and Graphical Display of the Main Morphometric Parameters of a River Channel

机译:一套基于GRASS GIS的Shell脚本,用于河道主要形态参数的计算和图形显示

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For the analysis of river evolution, the use of quantitative parameters can be quite useful in order to assess changes in the channel planform. Among the several parameters proposed by different authors in a number of papers, channel length and width, braiding and sinuosity indexes, and channel lateral shifting are proved to be the most effective ones for a quantitative analysis of river changes. However, the calculation of these parameters is time-consuming, tedious and error-prone, even where made in a GIS environment. This work describes four shell scripts that perform fast and automatic calculation of the morphometric parameters and draw curves showing the?variation of the calculated parameters along the entire channel development. The scripts are?based on commands of the GRASS GIS free and open source software and, as input, they require a simple vector map containing the essential features of a river channel,?i.e.?bankfull channel limits and longitudinal and lateral bars.
机译:对于河流演变的分析,定量参数的使用对于评估河道平面图的变化可能非常有用。在不同作者在许多论文中提出的几个参数中,河道的长度和宽度,编织度和弯曲度指数以及河道的横向位移被证明是定量分析河流变化的最有效参数。但是,即使在GIS环境中进行这些参数的计算也是费时,繁琐且容易出错的。这项工作描述了四个shell脚本,这些脚本执行形态参数的快速和自动计算,并绘制曲线以显示所计算的参数在整个通道开发过程中的变化。这些脚本基于GRASS GIS免费和开源软件的命令,并且作为输入,它们需要一个简单的矢量地图,其中包含河道的基本特征,即河岸满额限制以及纵向和横向条形图。

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