1. 贵州师范大学 喀斯特研究院/地理与环境科学学院,贵州,贵阳,550001
2. 贵州省山地资源研究所,贵州,贵阳,550001
3. 国家喀斯特石漠化防治工程技术研究中心,贵州,贵阳,550001
纸质出版:2020
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赵卫权, 周忠发, 李威, 等. 1973-2017年贵阳市饮用水源地植被覆盖度的演变特征[J]. 水土保持通报, 2020,40(1):290-296.
Zhao Weiquan, Zhou Zhongfa, Li Wei, et al. Evolution Characteristics of Vegetation Coverage of Main Drinking Water Sources in Guiyang City During 1973-2017[J]. Bulletin of Soiland Water Conservation, 2020, 40(1): 290-296.
赵卫权, 周忠发, 李威, 等. 1973-2017年贵阳市饮用水源地植被覆盖度的演变特征[J]. 水土保持通报, 2020,40(1):290-296. DOI: 10.13961/j.cnki.stbctb.2020.01.042.
Zhao Weiquan, Zhou Zhongfa, Li Wei, et al. Evolution Characteristics of Vegetation Coverage of Main Drinking Water Sources in Guiyang City During 1973-2017[J]. Bulletin of Soiland Water Conservation, 2020, 40(1): 290-296. DOI: 10.13961/j.cnki.stbctb.2020.01.042.
[目的] 探讨贵阳市"两湖一库"(红枫湖、百花湖、阿哈水库)1973-2017年的植被覆盖度变化规律,为定量化探讨城市饮用水源地生态环境演变监测提供科学途径和理论依据。[方法] 采用1973年MSS影像、1993,2001,2008年TM数据和2017年OLI数据5期遥感影像,基于像元二分模型和植被覆盖度动态模型,运用遥感和GIS技术进行分析。[结果] ①研究区域植被覆盖度总体呈现"两头升高,中间降低"的规律,即低覆盖度和高覆盖度面积比例均呈上升趋势,而中低覆盖度、中覆盖度和中高覆盖度均基本呈下降趋势;②2001-2017年期间植被覆盖度年均变化率明显高于前3个时段即1973-1993,1993-2001,2001-2008年3个时段,2017年的中高覆盖度和高覆盖度面积比例之和大于1973年的两者之和,且高植被覆盖度区域的面积比例一直处于稳定上升态势。[结论] 贵阳市"两湖一库"植被中覆盖度部分退化、部分改善,但是整体主要以退化为主,退化原因则是城镇建设用地的扩张;社会经济活动和区域发展政策是地表植被覆盖度演变的主要驱动力,尤其是对低植被覆盖度和中植被覆盖度区域的影响。
[Objective] The changing pattern of vegetation coverage in "two lakes and one reservoir" (Hongfeng lake
Baihua lake
Aha reservoir) from 1973 to 2017 in Guiyang City was discussed in order to provide a scientific approach and theoretical basis for quantitatively exploring the monitoring of the ecological environment evolution of urban drinking water sources.[Methods] Five remote sensing images
including multi-spectral scanner (MSS) image in 1973
thematic mapper (TM) data in 1993
2001
2008 and operational land imager (OLI) data in 2017
and GIS technology were used to study the change of surface vegetation coverage
based on a dimidiate model and vegetation coverage dynamic model.[Results] ① The overall vegetation coverage grades of the study area showed a concave type curve
indicating that the proportion of area with low and high coverage increased
while the medium-low coverage
moderate coverage
and medium-high coverage decreased. ② During the period from 2008 to 2017
the annual rate of vegetation coverage change was significantly higher than the previous three periods
namely 1973 to 1993
1993 to 2001
and 2001 to 2008. The sum of the proportions of medium-high coverage and high coverage areas in 2017 was greater than the sum of the two in 1973. The area proportion of high-vegetation coverage had been steadily rising.[Conclusion] The vegetation coverage in the study area is degraded and improved over time
however the overall coverage is mainly degraded
due to the expansion of urban construction land. Socio-economic activities and regional development policies are the driving forces for the evolution of surface vegetation coverage
especially for areas with low and moderate vegetation coverage.
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