The analysis of relationship between artificial irrigation and drainage technology development and cultivated land change pattern has vital significance in the research of irrigation agriculture development in arid areas. Manasi River Watershed was taken as the study area. The topographical map of Manas River Watershed in 1960, remote sensing images taken in 1976, 1989, 1997, 2006 and 2013, historical maps of water conservancy, and other original data were processed by remote sensing image possessing and spatial analysis in geographic information system, and the artificial irrigation and drainage canal system at five stages and land use classification in six periods were obstained. Then the length index of artificial irrigation canal system and the indices describing cultivated land pattern, i.e. oasis reclamation rate, net cultivated land coefficient, perimeter-area rate, were calculated. Finally, stepwise regression method was used to explore the effects of artificial irrigation and drainage technology on the change of cultivated land pattern. The results showed that: before the application of drip irrigation, the distribution pattern of cultivated lands in Manasi River Watershed was determined by the spatial distribution of irrigation and drainage canal system, especially the distribution pattern and the length of sublateral canals, the regression equation being y=0.43x+7.38 (R2=0.90, n=33, P=0). After the application of drip irrigation, the change pattern of cultivated lands was determined by the distribution of pipe networks of drip irrigation, especially the distribution pattern and length of main pipe and branch pipes, resulting in the increase of water use efficiency from 0.38 (1960s) growth to 0.65 (2010) in the watershed.
LI Jian-jun, LUO Ge-ping, DING Jian-li, XU Wen-qiang, ZHENG Shuan-li
. Effect of Progress in Artificial Irrigation and Drainage Technology on the Change of Cultivated Land Pattern in the Past 50 Years in Manasi River Watershed[J]. JOURNAL OF NATURAL RESOURCES, 2016
, 31(4)
: 570
-582
.
DOI: 10.11849/zrzyxb.20150370
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