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首页> 外文期刊>Proceedings of the Institution of Civil Engineers >Determination of urbanisation based on imperviousness
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Determination of urbanisation based on imperviousness

机译：基于不渗透性的城市化确定

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Imperviousness, which is defined as the property of a surface that prevents infiltration, is directly a measure of urbanisation. This is mainly due to the fact that the built-up area as a result of urbanisation contributes to imperviousness. The current study uses a remote sensing technique along with the available geographic information system (GIS) data to determine the imperviousness characteristics of an urban catchment. The objective is to quantify the difference in imperviousness determination due to spatial resolution of satellite imagery and to suggest any corrective measures for improving the methodology. The results indicate that impervious classes are found to be underestimated and vegetations are overestimated in low-resolution Landsat images due to the presence of sparsely located hilly settlements. Impervious areas that are underestimated were correctly traced by the use of building footprints for the area, which also prevents overestimation of the pervious group. The study clearly indicates that urbanisation defined based on imperviousness can be underestimated, if fine-resolution satellite imagery and suitable methodology is not used. It is recommended to use the best possible fine-resolution imagery available integrated with the GIS dataset for the precise determination of imperviousness and quantification of urbanisation growth.
机译：防渗性（定义为防止渗透的表面特性）直接衡量城市化程度。这主要是由于以下事实：由于城市化而导致的建筑面积增加了不渗透性。当前的研究使用遥感技术以及可用的地理信息系统（GIS）数据来确定城市集水区的防渗特性。目的是量化由于卫星图像的空间分辨率而导致的不渗透性确定的差异，并提出改进该方法的任何纠正措施。结果表明，由于稀疏的丘陵定居点的存在，在低分辨率的Landsat影像中发现不可渗透的类别被低估了，而植被被高估了。通过使用该区域的建筑足迹可以正确地跟踪被低估的不可渗透区域，这也可以防止对高渗透率组的高估。该研究清楚地表明，如果不使用高分辨率的卫星图像和合适的方法，基于渗透性定义的城市化可能会被低估。建议使用与GIS数据集集成的最佳高分辨率图像，以精确确定城市的不渗透性和量化。

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