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Remote Sensing Technology and Application  2008, Vol. 23 Issue (2): 208-213    DOI: 10.11873/j.issn.1004-0323.2008.2.208
article     
The Irrigation Channel System Mapping and Its Stucture Analysis for the Zhangye Oasis in the Middle Heihe River Basin
HU Xiao-li1,LU Ling1,MA ming-guo1,LIU Xiao-jun2
(1.Cold and Arid Region Environmental and Engineering Research Institute,Chinese Academy of 
Sciences,Lanzhou 730000,China|2.Zhangye Water Conservancy Bureau,Zhangye 734000,China)
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Abstract  

The artificial irrigation channel system plays a significant role in the development of the Zhangye oasis in the middle Heihe River Basin,northwest China.By using remote sensing,GIS and GPS approaches,the digital irrigation channel system map of the Zhangye oasis was firstly compiled based on a large number of high spatial resolution topographic maps and satellite images as well.This digital map includes the detailed spatial and property information of the Zhangye oasis' irrigation channel system in three levels (main channel,branch channel and tip channel) and has been widely validated and calibrated by intensive GPS ground\|measurements over all the channel network of the oasis.The channel spatial structure and its relation with the local land use evolution were analyzed in this study.Currently,the total number of the irrigation channels in the Zhangye oasis is about 6300,in which the main channels,the branch channels and the tip channels account for 21.9%,25.54% and 52.54%,respectively.The total length of the whole channel system reaches to 8 749.51 km with an average channel density of 0.47 km/km2.Among the five counties in the Zhangye oasis,the Ganzhou district has the densest irrigation channel distribution,whereas the Shandan county has a relatively poor channel construction.The development of the artificial irrigation channel system and the water resource exploitation in the arid oases could greatly affect and change the local landscape pattern and land use style. 

Key words:   Oasis in the arid region      Irrigation channel system      Heihe River basin      Remote sensing and GIS     
Received:  20 November 2007      Published:  24 October 2011
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Cite this article: 

HU Xiao-li,LU Ling,MA ming-guo,LIU Xiao-jun. The Irrigation Channel System Mapping and Its Stucture Analysis for the Zhangye Oasis in the Middle Heihe River Basin. Remote Sensing Technology and Application, 2008, 23(2): 208-213.

URL: 

http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2008.2.208     OR     http://www.rsta.ac.cn/EN/Y2008/V23/I2/208

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