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首页> 外文期刊>Environmental engineering and management journal >APPLICATION OF GIS TECHNIQUES FOR THE QUANTIFICATION OF LAND DEGRADATION CAUSED BY WATER EROSION
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APPLICATION OF GIS TECHNIQUES FOR THE QUANTIFICATION OF LAND DEGRADATION CAUSED BY WATER EROSION

机译：GIS技术在水蚀造成土地退化定量化中的应用

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摘要

Land decay processes caused by erosion are very serious by their long term impact on the quality of soils, surface waters, environment and living standards. This article presents the results of a spatial erosion modelling. A new methodology is hereby proposed to estimate the soil losses caused by water erosion. The method is based on using GIS techniques, and its novelty consists in applying the mathematic calculation model on the pixel/cell level, by using the " overlay" technique, which grants a high level of accuracy for the results. The input data used are four site plans (topographical survey, land use layout, soils layout, and erosion control plan map). Upon processing, seven information layers resulted, which are included in the calculation model, representing actually the factors triggering and maintaining the erosion process. The scope of erosion modeling is to determine the actual and potential erosion in the hydrographical basin considered for the study. Results show an average annual soil loss much above the tolerable limit in our country. In-house developed software application for erosion simulation (in Fortran language) was run under Geo-Graph software, that was used for the entire project development. At the end of the work it is shown that erosion modeling suggested by this software is balanced (through comparison / test) by the erosion measurements and tests performed by researchers from the Research and Development Center for Soil Erosion Control, Perieni, Romania.
机译：侵蚀引起的土地退化过程对土壤，地表水，环境和生活水平的长期影响非常严重。本文介绍了空间侵蚀建模的结果。因此，提出了一种新的方法来估算水蚀造成的土壤损失。该方法基于使用GIS技术，其新颖之处在于通过使用“覆盖”技术在像素/单元级别上应用数学计算模型，从而使结果具有较高的准确性。使用的输入数据是四个站点计划（地形调查，土地使用布局，土壤布局和侵蚀控制计划图）。经过处理后，得出了七个信息层，这些信息层都包含在计算模型中，实际上代表了触发和维持侵蚀过程的因素。侵蚀模型的范围是确定研究中所考虑的水文盆地的实际和潜在侵蚀。结果表明，每年的平均水土流失大大超过了我国的容许极限。内部开发的用于侵蚀模拟的软件应用程序（使用Fortran语言）在Geo-Graph软件下运行，该软件用于整个项目开发。在工作结束时，表明该软件建议的侵蚀模型（通过比较/测试）与来自罗马尼亚佩雷尼土壤侵蚀控制研究与发展中心的研究人员进行的侵蚀测量和测试是平衡的（通过比较/测试）。

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