Scopus记录号: 2-s2.0-84904474182
论文题名: Impact of the construction of a large dam on riparian vegetation cover at different elevation zones as observed from remotely sensed data
作者: Kellogg C ; H ; , Zhou X
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2014
卷: 32, 期: 1 起始页码: 19
结束页码: 34
语种: 英语
英文关键词: Elevation zone
; Environmental impact
; Modis vegetation index
; Three gorges dam
; Time series
; Vegetation cover
Scopus关键词: ASTER
; dam construction
; digital elevation model
; environmental impact
; environmental monitoring
; GIS
; land cover
; land use change
; mapping
; MODIS
; reservoir
; riparian vegetation
; satellite imagery
; vegetation cover
; water level
; China
; Hubei
; Three Gorges Dam
英文摘要: The impact of the construction of a large dam on riparian vegetation cover can be multifold. How the riparian vegetation cover changes at different elevation zones in response to the construction of a large dam and the subsequent impound of reservoir water is still an open question. In this study, we used satellite remote sensing data integrated with geographic information system (GIS) to monitor vegetation cover change at different riparian elevation zones on a large spatial scale, taking the Three Gorges Dam in China as an example. Due to the large scale of this newly formed reservoir, it is expected to impact the riparian vegetation canopy both directly and indirectly. We chose to monitor vegetation cover changes along the 100 km riparian stretch of river directly upstream of the Three Gorges Dam site, over the construction period of eleven years (2000-2010), using MODIS vegetation indices products, digital elevation model (DEM) data from ASTER, and the time series water level data of the Three Gorges reservoir as the data sources. Results show that non-vegetated area increased in the inundated zone (below 175 m), as expected; area of densely vegetated land cover increased within the elevation zone of 175-775 m and no change in vegetation cover was observed above 775 m in elevation. Regression analysis between the vegetation index data and the reservoir water level shows that increasing water levels have had a negative impact on vegetation cover below 175 m, a positive impact on vegetation cover is limited to the region between 175 and 775 m, and no significant impact was observed above 775 m. MODIS EVI product is less sensitive in mapping non-vegetated land cover change, but more sensitive in mapping vegetated land cover change, caused by the reservoir water level variation; both products are similar in effectively tracking a trend between land cover change in each elevation zone with time or with reservoir water level. © 2014 Elsevier B.V. All rights reserved. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79750
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geophysical Engineering, Montana Tech of The University of Montana, Butte, MT 59701, United States
Recommended Citation:
Kellogg C,H,, Zhou X. Impact of the construction of a large dam on riparian vegetation cover at different elevation zones as observed from remotely sensed data[J]. International Journal of Applied Earth Observation and Geoinformation,2014-01-01,32(1)