| 安徽省植被覆盖度动态变化及其对地形的响应 |
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| 引用本文： | 姚镇海,吴丹娃,褚荣浩,姚叶青,何彬方,黄勇.安徽省植被覆盖度动态变化及其对地形的响应[J].水土保持通报,2021,41(3):283-290. |
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| 作者姓名： | 姚镇海 吴丹娃 褚荣浩 姚叶青 何彬方 黄勇 |
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| 作者单位： | 安徽省公共气象服务中心, 安徽 合肥 230031;安徽省气象科学研究所, 安徽 合肥 230031 |
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| 基金项目： | 安徽省气象局科研项目“基于通用热气候指数的安徽省夏季气候舒适度精细化评价与预测研究”（KM202003） |
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| 摘 要： | 目的] 探究安徽省植被覆盖度的时空变化特征与地形的相互关系，为当地资源开发中加强生态环境建设提供理论依据。方法] 在GIS与RS技术支持下，使用安徽省2001—2019年逐月MODIS/NDVI数据，2001—2019年土地分类数据和安徽省DEM海拔、坡向地形数据，分析植被覆盖度时空变化特征及其与地形因子相互关系。结果] 安徽省植被覆盖度季节变化特征明显。1月、10—12月，全省植被覆盖度呈现低值，且山区高于平原；2—5月，淮北平原地区植被覆盖度呈现高值，6月迅速减小；7—9月全省范围植被覆盖呈现高值，大部地区植被覆盖度高于0.8，山区平原空间差异最小。全省植被覆盖度年变化率为0.003 9/a，与时间相关性显著（R2=0.814 8）。不同海拔区间内，植被覆盖度四季差异明显。受下垫面地表类型影响，200 m以下植被覆盖度呈现低值，200～350 m植被覆盖度陡然升高，1 250 m以上植被覆盖度呈下降趋势。各坡向四季植被覆盖度夏季>秋季>春季>冬季。北坡、南坡分别为峰值、谷值。南、北向山区植被覆盖度差异呈逐年波动下降趋势，其差异值多年平均值夏季最低（0.009 3），秋季最高（0.014 2），春冬季分别为0.013 9，0.012 5。结论] 安徽省海拔、坡向显著影响植被覆盖度动态变化特征，需结合地形特点合理开发利用地表资源，并做好生态环境保护工作。
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| 关 键 词： | 安徽省 植被覆盖度 动态变化 地形关系分析 |
| 收稿时间： | 2020/11/11 0:00:00 |
| 修稿时间： | 2021/1/25 0:00:00 |
Dynamic Change of Vegetation Coverage and Its Response to Topography in Anhui Province |
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| Yao Zhenhai,Wu Danw,Chu Ronghao,Yao Yeqing,He Binfang,Huang Yong.Dynamic Change of Vegetation Coverage and Its Response to Topography in Anhui Province[J].Bulletin of Soil and Water Conservation,2021,41(3):283-290. |
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| Authors: | Yao Zhenhai Wu Danw Chu Ronghao Yao Yeqing He Binfang Huang Yong |
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| Institution: | Anhui Meteorological Service Center, Hefei, Anhui 230031, China;Anhui Meteorological Research Institute, Hefei, Anhui 230031, China |
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| Abstract: | Objective] The relationship between the spatial-temporal variation characteristics of vegetation coverage and topography in Anhui Province was explored in order to provide a theoretical basis for local resource development and ecological environment construction. Methods] With the support of GIS and RS technology, MODIS / NDVI data of Anhui Province from 2001 to 2019, land classification data from 2001 to 2019, and DEM elevation and aspect topographic data of Anhui Province were used to analyze the spatio-temporal variation characteristics of vegetation coverage and its relationship with topographic factors. Results] The seasonal variation characteristics of vegetation coverage in Anhui Province were obvious. In January and October to December, the vegetation coverage of Anhui Province was low, and the mountain area was higher than the plain; from February to May, vegetation coverage of Huaibei Plain was high, and decreased rapidly in June; from July to September, the vegetation coverage of Anhui Province was high, with most of the areas greater than 0.8, and the smallest spatial differences observed in the mountain and plain areas. The annual change rate of vegetation coverage was 0.003 9/a, and this change rate was significantly correlated with time (R2=0.814 8). Differences in vegetation coverage in the four seasons were obvious at different altitudes. Vegetation coverage below 200 m was affected by underlying surface types and showed low values. Vegetation coverage increased sharply between 200 m and 350 m, and presented a downward trend above 1 250 m. Vegetation coverage during the four seasons followed the order of summer > autumn > spring > winter. The north and south slopes presented the maximum and minimum values, respectively. Differences of vegetation coverage in the south and north mountain areas showed a downward trend over time. The annual average vegetation coverage differences of south and north mountains were lowest in summer (0.009 3) and highest in autumn (0.014 2), while values in spring and winter were 0.013 9 and 0.012 5, respectively. Conclusion] Altitude and aspect affected the dynamic variation characteristics of vegetation coverage significantly in Anhui Province. Considering these terrain characteristics is necessary for reasonable development and utilization of land surface resources, as well as for protecting the ecological environment. |
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| Keywords: | Anhui Province vegetation coverage dynamic change terrain relationship analysis |
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