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对提取干旱区盐渍化信息的若干方法进行了评述,并且选取位于干旱区地带的盐渍化典型区域——阿克苏地区的库车、新和、沙雅县(渭-库绿洲)以及和田地区的于田县(于田绿洲)作为研究区进行实证分析。采用同一时相的ETM+数据,运用K-T变换、比值变换以及通过NDVI指数和分类来提取信息,效果明显。通过实证分析发现:虽然研究区都地处塔里木盆地周边地区,一个是塔北绿洲,另一个是塔南绿洲。但由于水文(盐渍化形成的关键)、气候(形成盐渍化土壤的驱动力)、地形(盐渍化土壤分布及差异的主要因素)、人类活动(盐渍化土壤形成的重要因素)等因素差异的存在,导致了盐渍化情况的差异。再利用Surfer软件绘制盐渍化出土壤特征(电导率)的等值线图,发现渭-库绿洲和于田绿洲表层土壤电导率的空间分布状况的差异。
A number of methods for extracting salinization information in arid areas were reviewed, and the typical salinization areas in the arid area - Kuche, Xinhe, Shaya (Wei-Ku) oasis in Aksu area and the Hetian area Of Yutian County (Yutian Oasis) as a research area for empirical analysis. Using ETM + data from the same phase, using K-T transformation, ratio transformation and extracting information by NDVI index and classification, the effect is obvious. Empirical analysis shows that although the study areas are located in the surrounding area of the Tarim Basin, one is the Tabei Oasis and the other is the Tannan Oasis. However, due to hydrology (the key to the formation of salinization), the climate (driving forces that form salinized soils), the topography (salinized soil distribution and the major contributors to differences), human activity (an important factor in the formation of salinized soils) The existence of other factors, led to the salinization of the differences. The contour map of salinization soil characteristics (conductivity) was drawn by Surfer software to find out the difference of soil electrical conductivity in the Wei-Ku-oasis and Yutian oasis.