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首页> 外文期刊>Geology, Ecology, and Landscapes >Land use change and classification in Chaohu Lake catchment from multi-temporal remotely sensed images
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Land use change and classification in Chaohu Lake catchment from multi-temporal remotely sensed images

机译：基于多时相遥感影像的巢湖流域土地利用变化与分类

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ABSTRACT Chaohu lake and its surrounding have received considerable attention in terms of water and sediment pollution investigations. In this study, the trend of changes in four key land uses in the catchment area was examined. Maximum Likelihood Supervised Classification (MLC) in ESRI? ArcGIS was applied to subsets of Landsat MSS, TM, ETM and OLI/TIRS images of 1979 to 2015. The results showed that the water bodies’ position remained relatively stable, while the portions of land used for urban activities and agriculture consistently increased. The built-up areas increased from 3.5% in 1979 to 25.1% in 2015. Similarly, the agricultural land use increased from the area coverage of 29.8% in 1979 to 45.2% in 2015. Forested/vegetated land of the catchment substantially decreased during this period, from 59.8% in 1979 to 22.9% in 2015. Decades of improper land use activities and resource utilisation have led to ecological degradation of the basin which has manifested in serious eutrophication of the lake. The conflict between the economic development and the need to protect the ecosystem of Chaohu catchment has now become a management issue. Deliberate planning should be made to reduce the rate of conversion of the forested land area to agriculture and urban use.
机译：摘要巢湖及其周边地区在水和沉积物污染调查方面受到了相当大的关注。在这项研究中，研究了集水区四种主要土地利用的变化趋势。 ESRI中的最大可能性监督分类（MLC）？将ArcGIS应用于1979年至2015年的Landsat MSS，TM，ETM和OLI / TIRS图像的子集。结果显示，水体的位置保持相对稳定，而用于城市活动和农业的土地比例持续增加。建成区面积从1979年的3.5％增至2015年的25.1％。同样，农业土地利用也从1979年的29.8％增至2015年的45.2％。从1979年的59.8％到2015年的22.9％。数十年不当的土地利用活动和资源利用导致了流域的生态退化，这表现为湖泊严重富营养化。经济发展与保护巢湖流域生态系统的需求之间的冲突现在已成为管理问题。应进行周密的计划，以减少林地面积向农业和城市使用的转化率。

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