西安交通大学能源与动力工程学院,西安,710049
网络首发:2010-03-10,
纸质出版:2010
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谭良玺 1, 张会英 1, 张瑞芳 1, 等. 陕北红碱淖流域景观格局变化研究[J]. 西安交通大学学报, 2010,44(3):126-132.
Study on the Landscape Pattern Change of Hongjiannao Watershed in Northern Shaanxi Province[J]. 2010, 44(3): 126-132.
选用1986年、1989年、1999年和2002年4个时期的Landsat-TM/ETM的遥感影像
利用ERDAS IMAGINE软件和fragstats3.3景观格局分析系统定量分析了陕北红碱淖流域土地利用/土地覆盖和景观格局的变化特征.结果表明:1986~2002年
红碱淖流域的密灌、林草地和其他水域面积分别增加了15.45%、30.33%和106.16%
沙丘稀灌、耕地和湖泊面积分别减少了40.05%、10.10%、24.33%
说明流域内湖泊退化严重
沙丘稀灌和耕地主要向密灌和林草地景观转化; 流域景观指数中
流域平均斑块面积减少
斑块总数、形状指数、多样性指数增加
说明流域景观破碎化程度加剧
流域景观类型增加; 退耕还林工程的实施使流域内林草地斑块面积增大; 流域上游修建水库拦蓄和农灌开采地表水量是湖泊面积减少的主要原因
人类社会活动是流域景观格局变化的主要因素.
With ERDAS IMAGINE and the fragstats3.3 landscape pattern analysis system
dynamics and its impacting factors of the land use/land cover and landscape pattern in Hongjiannao watershed were quantitatively analyzed with some landscape indices. The results show that during 1986-2002
the areas of dense shrub
forest/infield and other water types increased by 15.45%
30.33%
and 106.16%
respectively. The areas of arable land
dune shrub and the lakes decreased by 40.05%
10.10%
and 24.33%
respectively
showing that the lakes were seriously degraded and the dune sparse shrub and cultivated land primarily transformed to dense shrub and forest meadow. Some landscape pattern indices increased
such as the total number of patches
shape index
diversity index
but the average patch area decreased
indicating that the degree of watershed landscape fragmentation and the landscape types increased. With the implementation of the returning farmland to forest(grass)project
the landscape fragmentation was mitigated during 1999-2002. Our conclusion is that the construction of reservoirs upstream and agricultural irrigation lead primarily to the reduction of lake area and human socio-economic activity has the main influence on the landscape pattern changes in the Hongjiannao watershed.
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