滇池流域不透水表面扩张监测与时空过程分析

发布时间：2018-06-24 20:48

本文选题：不透水表面 + 滇池流域　；参考：《仪器仪表学报》2016年12期

【摘要】：人类活动是影响和改变自然和人文环境最主要的因素,而不透水表面是反映人类活动频度与强度重要指标。近30年来,随着城镇化的不断推进,不透水表面快速扩张,同时伴随着一系列流域水环境问题产生。掌握不透水表面变化的时空过程是改善流域水环境、控制水污染的基础。为此,以滇池流域近25年来的TM影像与OLI影像为数据基础,将改进的NDBI算法及线性光谱混合分析法相结合,得到了滇池流域近25年来不透水表面的空间范围、空间分布、不透水表面指数、不透水表面覆盖度等指标。实验结果表明,本文采用的算法效果较好,0.2 m空间分辨率的航拍影像精度检验结果表明,提取精度达到85.27%;滇池流域不透水表面覆盖率达19.44%,部分子流域不透水表面覆盖率超过40%,其对流域生态系统功能和结构有直接的影响。
[Abstract]:Human activity is the most important factor affecting and changing the natural and human environment, and the water surface is an important indicator of the frequency and intensity of human activity. In the past 30 years, with the continuous advancement of urbanization, the surface of the water surface is rapidly expanding, and a series of water environment problems are accompanied by a series of watersheds. This is the basis for improving water environment and controlling water pollution in the basin. Therefore, the TM and OLI images of the Dianchi basin for the last 25 years are based on the data. The improved NDBI algorithm and linear spectral mixed analysis method are combined to obtain the spatial distribution, spatial distribution, water surface index, and impermeable surface of the water surface in the Dianchi basin for nearly 25 years. The experimental results show that the results of the proposed algorithm are better. The accuracy test results of aerial photography with 0.2 m spatial resolution show that the extraction precision reaches 85.27%, the water surface coverage rate of the Dianchi basin is 19.44%, the water surface coverage rate of some sub basins is over 40%, and it has the function and structure of the watershed ecosystem. Direct impact.
【作者单位】：云南师范大学信息学院;西部资源环境地理信息技术教育部工程研究中心;云南师范大学旅游与地理科学学院;
【基金】：国家高技术研究发展计划(2012AA121402) 国家教育部博士点基金(20115303110002) 云南省自然科学基金青年项目(2016FD020) 云南师范大学博士科研启动基金国家自然科学基金(41561086)项目资助
【分类号】：X143;X87

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