| 临汾市近20年植被覆盖度遥感估算及动态变化分析 |
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| 引用本文： | 马秀秀,王雅萍,程结海,何 湜.临汾市近20年植被覆盖度遥感估算及动态变化分析[J].中州煤炭,2019,0(11):11-18. |
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| 作者姓名： | 马秀秀 王雅萍 程结海 何 湜 |
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| 作者单位： | （河南理工大学 测绘与国土信息工程学院，河南 焦作 454000） |
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| 摘 要： | 植被覆盖度是衡量植被生长状况的指标，对分析评价区域生态环境具有重要意义。以临汾市1998年、2007年和2018年Landsat遥感影像作为数据源，利用ENVI和ARCGIS软件，通过计算归一化植被指数（NDVI）值，利用像元二分模型，对临汾市近20年的植被覆盖度及其动态变化进行分析。分析结果显示:1998年、2007年和2018年临汾市的平均植被覆盖度分别为45.92%、58.76%和60.09%，处于递增的态势。在这20年间，极低覆盖度和低覆盖度的植被面积都有减少，而中等覆盖度、高覆盖度和极高覆盖度的植被面积增加。高覆盖度和低覆盖度的植被面积变化最大，高覆盖度的植被面积增加了3 063.14 km2，约占临汾市总面积的15.21%；低覆盖度的植被面积减少了3 192.38 km2，约占临汾市总面积的15.85%。说明临汾市的生态环境有所改善，这与该区水土保持项目的实施以及封禁治理有关。
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| 关 键 词： | 临汾市 NDVI' target='_blank'>NDVI 植被覆盖度 像元二分模型 |
Remote sensing estimation and dynamic change analysis of vegetation coverage in Linfen City in recent 20 years |
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| Ma Xiuxiu,Wang Yaping,Cheng Jiehai,He Shi. Remote sensing estimation and dynamic change analysis of vegetation coverage in Linfen City in recent 20 years[J].Zhongzhou Coal,2019,0(11):11-18. |
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| Authors: | Ma Xiuxiu Wang Yaping Cheng Jiehai He Shi |
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| Affiliation: | （School of Surveying and Land Information Engineering，Henan Polytechnic University，Jiaozuo 454000，China） |
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| Abstract: | Vegetation coverage is an indicator to measure the growth of vegetation，and is of great significance for the analysis and evaluation of regional ecological environment.Using Landsat remote sensing images of Linfen City in 1998，2007 and 2018 as data sources，using ENVI and ARCGIS software，by using the normalized vegetation index（NDVI） value，using the dimidiate pixel model，the vegetation coverage of Linfen City in the past 20 years and its dynamic changes were analyzed.The results showed that from 1998，2007 and 2018，the average vegetation coverage of Linfen City were 45.92%，58.76% and 60.09%，which were in an increasing trend.During these 20 years，the area of very low coverage and low coverage has been reduced，while the area of vegetation with medium coverage，high coverage and extremely high coverage has increased.The area of vegetation with high coverage and low coverage was the largest.The area of high coverage was increased by 3 063.14 km2，accounting for about 15.21% of the total area of Linfen City.The area of low coverage was reduced by 3 192.38 km2，accounting for about 15.85% of the total area of Linfen City.It showed that the ecological environment of Linfen City has improved，which was related to the implementation of the water and soil conservation project in the area and the ban. |
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| Keywords: | ,Linfen City, NDVI' target='_blank'>NDVI, vegetation coverage, dimidiate pixel model |
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