New Zealand Journal Agricultural Research abstracts
Remote sensing analyses of spatio-temporal changes of the
ecological environment in the lower reaches of the Tarim River
Yan Zhenglong1,2,*
Huang Qiang1
Tian Huifang3
Jin Xiaochun4
1College of Hydraulic and Electrical Engineering
Xi’an University of Technology
5 South Jinhua Road, Xi’an City
710048, PR China
2Aerial Photogrammetry and Remote Sensing Bureau
3 Jianxi Road, Xi’an City
710054, PR China
3Baoji University of Arts and Sciences
44 Baoguang Road, Baoji City
721007, PR China
4Ordnance Engineering College
97 Heping Road, Shijiazhuang City
050003, PR China
*Author for correspondence: yanzlgis@sohu.com
Abstract The ecological environment in the
Tarim River Basin
is extremely fragile. The ecological problems resulting from local
economic development in this region have been a hot topic for the
ecological scientists. There is a new trend to use information
technologies to monitor the ecological environment dynamically by means
of the modern information technologies. To meet the constant
requirements of long-term monitoring of a region ecological
environment, this paper focuses on the vegetation coverage and land
desertification on the basis of the information technologies of remote
sensing (RS), geographic positioning systems (GPS), geographic
information systems (GIS), and data warehouse, applying the theory of
the integrative spatial and attribute data, seamless integration of
multi-source data. The ecological environment for the lower reaches of
the Tarim River is analysed qualitatively and quantitatively. The
investigated database is established and managed through multi-source
and multi-type massive data, which are collected from three periods of
the remote sensing images and background data in 1999, 2002 and 2004,
respectively. The methods of system classification, remote sensing
interpretation, vegetation coverage, conversion models construction,
and massive data built database are applied to analyse the data
concerned during the dynamically monitoring the ecological environment
in the Tarim River Basin. The results show that the vegetation coverage
has increased gradually each year after the emergent water
transportation project was started, whereas the desertification area
has decreased, some sand areas have obviously retreated. The speed of
improvement in the east part of the river has been higher than in the
west. The ecological environment in the lower reaches of the Tarim
River has tended to improve after the emergent water transportation
project in the lower reaches of the Tarim River Basin. In conclusion,
the emergent water delivery plays a decisive and significant role in
promoting the ecological environment in this region.
Keywords database; ecological environment; remote
sensing; Tarim River
A07078; Online publication date 21 December 2007; Received and
accepted 10 August 2007
New Zealand Journal of Agricultural Research, 2007, Vol. 50:
679–687
0028–8233/07/5005–0679 © The Royal Society of New Zealand 2007
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