闪电河上游生态环境时空变化遥感研究

发布时间：2019-04-12 07:52

【摘要】：遥感技术的发展为生态环境的动态变化监测提供了有力的支撑。闪电河流域是京津冀地区重要的生态屏障,随着全球气候变化和人类活动的加剧,闪电河流域的生态环境变化得到了人们广泛的关注。为明确闪电河流域长时间序列的时空变化,本文利用1985—2015年近30 a间的遥感数据,对闪电河上游地区的生态环境现状及其关键因子水域、林地和草地的长时间序列变化进行了研究。结果表明,研究区2015年林地、草地、未利用地、水域和耕地面积分别为413.75 km2,276.90 km2,1 779.94 km2,17.29 km2和1 583.71 km2,分别占研究区总面积的10.16%,6.80%,43.72%,0.42%和38.90%;在1985—2015年间,林地面积整体呈下降趋势,2015年总面积较1985年下降41.585 km2,下降速率为1.395 km2·a-1;草地面积总体也呈下降趋势,2015年草地总面积较1985年下降58.69%,下降速率为9.47 km2·a-1;水域面积基本保持不变。
[Abstract]:The development of remote sensing technology provides a powerful support for dynamic monitoring of ecological environment. The lightning river basin is an important ecological barrier in Beijing-Tianjin-Hebei region. With the increase of global climate change and human activities, the ecological environment change of the lightning river basin has been paid more and more attention. In order to clarify the temporal and spatial variation of the long-term time series of the lightning river basin, based on the remote sensing data from 1985 to 2015, the status quo of the ecological environment and its key factors in the upper reaches of the Shenhuihe River and its key factors are studied in this paper. The long time series changes of woodland and grassland were studied. The results showed that the forest land, grassland, unused land, water area and cultivated land in the study area accounted for 10.16%, 6.80% and 43.72% of the total area of the study area in 2015, respectively, 413.75 km2276.90 km2,1 779.94 km2,17.29 km2 and 1 583.71 km2, respectively. 0.42% and 38.90%; The total forest area decreased by 41.585 km2, in 2015 compared with 1985, and the decline rate was 1.395 km2 路a-1. The total area of forest land decreased by 1.395 km2 路a-1 in 2015. The total grassland area in 2015 was 58.69% lower than that in 1985, the rate of decrease was 9.47 km2 路a-1, and the water area remained unchanged.
【作者单位】：河北农业大学林学院;北京师范大学地理科学学部;北京师范大学全球变化与地球系统科学研究院;
【基金】：河北省科学技术厅项目“坝上闪电河湿地生态环境质量评价与监测技术研究”(编号:14274203D)资助
【分类号】：TP79;X835;X87

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