| 新疆伊犁新垦区土地荒漠化敏感性评价 |
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| 引用本文： | 康蕾,张红旗.新疆伊犁新垦区土地荒漠化敏感性评价[J].资源科学,2012,34(5):896-902. |
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| 作者姓名： | 康蕾 张红旗 |
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| 作者单位： | 1. 中国科学院地理科学与资源研究所,北京100101／中国科学院研究生院,北京100049
2. 中国科学院地理科学与资源研究所,北京,100101 |
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| 基金项目： | 国家自然科学基金(编号:41071065)。 |
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| 摘 要： | 基于野外调查构建了伊犁新垦区土地荒漠化敏感性的评价指标体系，并在GIS支持下完成了研究区土地荒漠化敏感性综合评价。结果表明：伊犁新垦区超过70％的土地呈现出不同程度的荒漠化敏感性，其中以具有轻度敏感性的荒漠化土地为主，占到新垦区土地总面积的一半以上；中度敏感和高度敏感的荒漠化土地比重分别为14_31％和6．90％。从土地荒漠化敏感性的类型及空间分布来看，南岸大渠灌区的土地主要受水蚀荒漠化影响，近80％的土地具有荒漠化敏感性，高度敏感的荒漠化土地比重超过10％；伊犁河北岸灌区是新垦区内沙质荒漠化敏感性程度最高的区域，超过70％的土地受到荒漠化威胁；察布查尔县伊犁河灌区和团结灌区主要受土壤次生盐渍化的影响，具有轻度荒漠化敏感的土地比重均超过60％；跃进灌区不具有荒漠化敏感性的土地比重达58．28％，环境相对较好，主要分布有轻度敏感的荒漠化土地。
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| 关 键 词： | 地荒漠化 敏感性评价 伊犁新垦区 |
| 修稿时间： | 2/7/2012 12:00:00 AM |
Assessment of the Land Desertification Sensitivity of Newly Reclaimed Area in Yili,Xinjiang |
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| KANG Lei and ZHANG Hongqi.Assessment of the Land Desertification Sensitivity of Newly Reclaimed Area in Yili,Xinjiang[J].Resources Science,2012,34(5):896-902. |
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| Authors: | KANG Lei and ZHANG Hongqi |
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| Institution: | Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China |
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| Abstract: | Xinjiang,located in the northwestern border of China,is the largest area of land desertification in China and also affected most by sand.In this study,based on field investigations,we have built an evaluation index system of land desertification sensitivity of Xinjiang Newly reclaimed area with the information of soil texture,soil organic matter content,groundwater,dune,gully density and sand transfer and change,saline expansion rate and grass reduce rate.According to the evaluation index system,we completed the comprehensive assessment of land desertification sensitivity in the study area with the supports of proper assessment units and GIS.The research results show that:the types of land desertification sensitivity are various in Xinjiang Newly reclaimed area,including the sensitivity of soil erosion,sandy desertification and land salinization;more than 70%of the land show varying degrees of desertification sensitivity,with mildly sensitive desertified land accounting for more than half of the total land area,moderately sensitive and highly sensitive desertified land making up 14.31%and 6.90%respectively.These data indicate that the overall ecological environment of newly reclaimed area is relatively fragile so that land desertification is easy to happen during the land development and utilization.From the points of view of spatial distribution and types of desertification sensitivity,Nan’an Canal Irrigated Area is mainly affected by the water erosion desertification,with nearly 80%of the land showing land desertification sensitivity and highly sensitive desertified land accounting for more than 10%.North Riverside Irrigated Area of the Yili River is a region of the strongest sandy desertification sensitivity,with more than 70%of the land threatened by desertification.Chabuchar Irrigated Area and Tuanjie Irrigated Area are mainly affected by secondary salinization,with over 60%of mild-sensitive land.58.28%of the land in Yuejin Irrigated Area is free of desertification sensitivity and the area is mainly distributed by mildly sensitive desertified land,so the environment there is relatively good.Therefore,improving the irrigation and drainage system and preventing the secondary soil salinization are the key points in future land resources development of the last three irrigated areas. |
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| Keywords: | Desertification Sensitivity assessment Yili newly reclaimed area |
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