| 中亚土库曼斯坦绿洲土壤盐渍化动态演变评估 |
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| 引用本文： | 丁建丽,张喆,李鑫,鄢雪英. 中亚土库曼斯坦绿洲土壤盐渍化动态演变评估[J]. 干旱区地理, 2013, 36(4): 571-578 |
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| 作者姓名： | 丁建丽 张喆 李鑫 鄢雪英 |
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| 作者单位： | 新疆大学资源与环境科学学院 绿洲生态教育部重点实验室， 新疆 乌鲁木齐 830046 |
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| 基金项目： | 国家国际科技合作项目(2010DFA92720-12) |
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| 摘 要： | 针对土库曼斯坦广泛存在的土壤盐渍化问题，选取达绍古兹州典型盐渍地为研究区，利用1990年、2000年和2010年的Landsat TM、ETM遥感影像，获取盐分指数（SI）和反照率（Albedo）构建SI-Albedo特征空间，利用土壤盐渍化遥感监测指数（SMI），计算并划分研究区盐渍化等级。结果表明：（1）利用SMI指数对区域土壤盐渍化状况进行统计及定量分析，有利于大尺度范围的土壤盐渍化动态监测；（2）1990-2010年间研究区盐渍化程度持续加重，其中，重度盐渍地增加1 103.9 km2，增长了5.28%；中度盐渍地增加1 716.184 km2，增长8.21%；（3）地形及气候等自然因素对研究区土壤盐渍化过程有较大影响，盲目的垦荒、不合理灌溉等人为因素更加剧了研究区盐渍化的形成，使得盐渍化现象更加严重，导致盐渍地面积的不断扩大。
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| 关 键 词： | 中亚 干旱区 特征空间 土壤盐渍化遥感监测指数 |
| 收稿时间： | 2012-11-02 |
Assessment of dynamic evolution on soil salinization of an oasis in Turkmenistan of Central Asia |
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| DING Jian-li;ZHANG Zhe;LI Xin;YAN Xue-ying. Assessment of dynamic evolution on soil salinization of an oasis in Turkmenistan of Central Asia[J]. Arid Land Geography, 2013, 36(4): 571-578 |
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| Authors: | DING Jian-li ZHANG Zhe LI Xin YAN Xue-ying |
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| Affiliation: | College of Resources and Environment Science, Xinjiang University, Key Laboratory of Oasis Ecosystem of Education Ministry, Xinjiang University, Urumqi 830046, Xinjiang, China |
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| Abstract: | As the pivot to connect Asia and Europe，Central Asia is strategically important region of the world. It is adjacent to Xinjiang，China. And they are very similar on climate，physical geography，environment and biological resources and other aspects. Therefore，it is favorable for Xinjiang to further expand exchanges and cooperation Central Asia in science and technology. Turkmenistan has typical temperate continental climate which is the second largest country in Asia. In recent decades，human activities especially agricultural industrialization caused great damage on soil structure and resulted in soil salinization. The proportion of salinized soil reached 76% in Turkmenistan in 2006. It is，therefore，necessary and important to study soil salinization in arid regions for solving this problem. Remote sensing （RS） technology demonstrates a number of advantages （such as Macro，comprehensive，fast，dynamic，accurate etc.） in this field which could have important practical significance on the rational use of water and land resources. The state of Dashoguz was selected for this study because of its serious salinization as a handicapping site for agricultural development. Three sets of Landsat TM/ETM image of 1990，2000 and 2010 were used and analysis of typical soil information，to extract Salinization Index （SI） and land surface [Albedo]，which are very important biophysical parameters of land surface. In this paper the relationship between salinization index （SI） and [Albedo] was analyzed quantitatively to building SI-Albedo feature space. Four salinization levels were classified and analyzed using Salinization Monitoring Index （SMI）. The results were as follows：（1） the statistic and quantitative analysis using Salinization Monitoring Index were conducive to large-scale range of dynamic monitoring of regional soil salinization. （2） The degree of salinization was continually increased in study area. And the severely salinization soil was increased by 5.28% while moderately salinization soil was increased by 8.21%. （3） The factors such as climate and topography had significant influence on the process of soil salinization. And unreasonable use of water and land would lead to accelerate the speed of the salinization formation and enlarge their areas. The practice shows that this method is effective in relating fields. |
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| Keywords: | Central Asia arid area characteristic space Salinization Monitoring Index |
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