Department of Geography, Nirmala College for Women (Aut), Coimbatore, Tamil Nadu, India.
Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
Environ Monit Assess. 2018 Jul 2;190(8):445. doi: 10.1007/s10661-018-6807-z.
The purpose of the present study was to explain land-use/cover changes in Coimbatore City Corporation using Landsat ETM+ and Landsat 8 Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) data for the period of 2003-2014. Two Landsat images from years 2003 and 2014 were downloaded from USGS Earth Explorer. Maximum likelihood method was used to classify the images into five classes: urban fabric, vegetation, water bodies, agriculture lands, and barren lands. Overall kappa accuracy measure is about to 87.60 and 86.15% for the years 2003 and 2014, respectively. The change detection analysis has been performed for years 2003 and 2014 postclassified images. The results of the study have indicated that Coimbatore City has experienced rapid modifications in LULC, particularly in terms of urban/built-up area. Over the past 11 years, urban/built-up areas have increased by 94.5 km, resulting in a significant drop in the area of agricultural land and vegetation cover. It is found that (1) urban areas are increased 200% due to population growth cum rapid economic progress. (2) Vegetation cover decreased 38.76% due to conversion into urban features. (3) Water bodies in area increased to 15.78% due to eradication of encroachment. (4) There is loss of 1.89% of agricultural lands due to demand for construction activities. (5) About 85.24% of barren lands were converted into other uses, particularly 57.33% to urban areas. (6) Urban growth has accelerated towards north-eastern, northern, and eastern parts, where national highways exist. The built-up areas were dropped from 85.32 to 22.28%, within 5-km distance from the city center.
本研究旨在利用 Landsat ETM+ 和 Landsat 8 运行陆地成像仪 (OLI) 和热红外传感器 (TIRS) 数据解释 2003-2014 年期间哥印拜陀市的土地利用/覆被变化。从 USGS Earth Explorer 下载了 2003 年和 2014 年的两幅 Landsat 图像。使用最大似然法将图像分为五类：城市结构、植被、水体、农业用地和荒地。2003 年和 2014 年的总体kappa 精度测量值分别约为 87.60%和 86.15%。对 2003 年和 2014 年后分类图像进行了变化检测分析。研究结果表明，哥印拜陀市经历了土地利用/覆被的快速变化，特别是在城市/建成区方面。在过去的 11 年中，城市/建成区增加了 94.5 平方公里，导致农业用地和植被覆盖面积显著减少。研究发现：(1) 由于人口增长和快速经济发展，城市面积增加了 200%。(2) 由于转化为城市特征，植被覆盖减少了 38.76%。(3) 由于消除侵占，水体面积增加了 15.78%。(4) 由于建筑活动的需求，农业用地减少了 1.89%。(5) 约 85.24%的荒地已转换为其他用途，特别是 57.33%转为城市用途。(6) 城市发展向东北、北部和东部加速，这些地区有国家高速公路。在距离市中心 5 公里范围内，建成区从 85.32%下降到 22.28%。
