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中国沙漠 ›› 2013, Vol. 33 ›› Issue (1): 24-32.DOI: 10.7522/j.issn.1000-694X.2013.00004

• 沙漠与沙漠化 • 上一篇    下一篇

基于栅格尺度的沙漠化预警模型研究——以塔里木河下游中段区域为例

孟现勇1,2, 刘志辉2,3,4, 李诚志2,3, 蔡 磊5, 刘敦利6   

  1. 1.新疆大学 资源与环境科学学院, 新疆 乌鲁木齐 830046;
    2.新疆大学 绿洲生态教育部重点实验室, 新疆 乌鲁木齐 830046;
    3.新疆大学 干旱生态环境研究所, 新疆 乌鲁木齐 830046;
    4.新疆大学 干旱半干旱区可持续发展国际研究中心, 新疆 乌鲁木齐 830046;
    5.陕西省煤田地质局 物探测量队, 陕西 西安 710001;
    6.新疆维吾尔自治区计量测试研究院, 新疆 乌鲁木齐 830011
  • 收稿日期:2012-03-26 修回日期:2012-05-30 出版日期:2013-01-20 发布日期:2013-01-20

Sandy Desertification Early-warning Model based on a 30 m×30 m Grid Scale: A case study on middle section of the lower reaches of Tarim River

MENG Xian-yong1,2, LIU Zhi-hui2,3,4, LI Cheng-zhi2,3, CAI Lei5, LIU Dun-li6   

  1. 1.College of Resource and Environment Sciences, Xinjiang University, Urumqi 830046, China;
    2.Ministry of Education Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi 830046, China;
    3.Institute for Ecology and Environment in Arid Lands, Xinjiang University, Urumqi 830046, China;
    4.International Research Center for Sustainable Development in Arid and Semi-arid Lands, Xinjiang University, Urumqi 830046, China;
    5.The Geophysical Survey Team of Coalfield Geology Bureau of Shaanxi Province, Xian 710001, China;
    6.Institute of Measurement and Testing of Xinjiang, Urumqi  830011, China
  • Received:2012-03-26 Revised:2012-05-30 Online:2013-01-20 Published:2013-01-20

摘要:

以塔里木河下游为研究区,基于沙漠化在气候、地表和人文3方面的成因构建沙漠化预警指标体系,并建立预警模型;基于研究区1990年、2000年和2006年的遥感、气候、地表和人文数据,利用ArcGIS对各因子数据进行量化和栅格化处理,通过预警模型实现了研究区3个时期在栅格尺度上(30 m×30 m)的沙漠化程度分布,分别利用前两期和第3期的结果进行参数修正和验证;在此基础上预测研究区“间歇输水”和“无输水”情况下2015年的沙漠化发展趋势。通过参数修正、预警模型对研究区沙漠化程度分布模拟正确率达90%以上,预警模型适用性较好。间歇输水对塔里木河下游沙漠化逆转起到一定的作用,是防止其完全沙漠化的必要措施,但此逆转作用基本上只局限于沿河道有限范围内,无法彻底改变研究区的沙漠化现状。

关键词: 沙漠化; 预警模型, 栅格尺度, 塔里木河下游, 生态输水

Abstract:

The lower reaches of the Tarim River was chosen as the study area, and a sandy desertification early-warning index system and model was set up based on understanding of climate, land surface, and human factors of sandy desertification. The early-warning indices were quantified and rasterized by ArcGIS based on remote sensing data, and the distribution patterns of sandy desertification in 1990, 2000 and 2006 in the study area were carried out on a grid scale of 30 m×30 m. The output results in 1990 and 2000 were used to correct the parameters, and the output results in 2006 were used for validation. Simulation results showed that the accurate rate was more than 90%, showing the model had good simulation effect. The development trend of sandy desertification in 2015 was predicted using this model under intermittent ecological water transport and no ecological water transport. The intermittent water transport made some desertification reversion, so it was a necessary measure to prevent sandy desertification. But in any case, desertification reversion only took place along the Tarim River, and the desertification status in the study area can not be changed thoroughly.

Key words: sandy desertification, early-warning model, grid scale, lower reaches of the Tarim River, ecological water transport

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