中国农业科学2017，Vol.50Issue(18)：3506-3518,13.DOI:10.3864/j.issn.0578-1752.2017.18.007
新疆渭干河—库车河三角洲绿洲耕地时空变化特征分析
Spatial-Temporal Characteristics of Cropland in the Ugan-Kuqa River Delta Oasis
摘要
Abstract
[Objective]Spatial and temporal characteristics of cropland are a main part of the LUCC research and it is becoming more important for food security, land protection and environmental change. XinJiang plays a significant role for the protection and sustainable development of the land resource which is ranked the richest province in China, with the agricultural land. TheUgan-Kuqa river delta oasis is considered the most important "food and cotton resource area" which is the largest irrigated region in the Aksu district in XinJiang. The main objective of this study is to analyze the causes of spatial and temporal change of the cropland in the research area, from 1994 to 2015 over 21years period.[Method] The cropland data were obtained from the Landsat images after processing based on the remote sensing platform. The changing rate, location index and plate density were selected for the analysis of the spatial and temporal changing dynamics of the cropland in recent 21 years for the research area.[Result] (1)The results showed that significant changes in the distribution and extent of cropland were occurred that it covered a surface area of 2488 km2 (17% of the total area) in 1994, 3931 km2(26%) in 2015 with an annual increasing rate of 2.7% (68.71 km2·a-1).The increased cropland mostly distributed in the margins of oasis and expanded to desert regions from the middle and upper reaches of the oasis. It could be attributed to agricultural activities and urban construction for increasing cropland and residential land, while the saline land and water land largely decreased; (2) Location index presented that there was a significant regional variation in 21 years period. The rank of location index was in the following order: Xinhe>Shaya>Kuqa, location index of the Xinhe and Shaya' counties was larger than mean value of the total area, becoming more concentration in distribution.[Conclusion]Cultivated landscape is becoming continuous from messy pieces over a 21-year period. These changes are due to the increased precipitation and runoff with supplying more water resource. Hence, population growth and its pressure on the land cultivation, improved drainage system are the main reasons for the growing of cropland. The methodology put forward in this study enables us to apply easily and quickly remote sensing and GIS techniques for detecting spatial and temporal change of cropland.关键词
渭干河—库车河三角洲绿洲/土地利用/土地覆被/耕地/时空变化/驱动因子Key words
Ugan-Kuqa river delta oasis/land use and land cover/cropland/spatial and temporal change/causes analysis引用本文复制引用
麦尔耶姆·亚森,买买提·沙吾提,吐尔逊·艾山,如则麦麦提·米吉提,依克丽曼·阿布都米提,马依拉·热合曼..新疆渭干河—库车河三角洲绿洲耕地时空变化特征分析[J].中国农业科学,2017,50(18):3506-3518,13.基金项目
国家自然科学基金(41361016,40901163,41130531,41561089)、新疆大学博士启动基金(BS120116)、新疆维吾尔科技厅基金(2014KL005,2013711014) （41361016,40901163,41130531,41561089）
