基于MSAVI-SI特征空间的玛纳斯河流域灌区土壤盐渍化研究

doi:10.13866/j.azr.2016.03.07

Abstract

Abstract: The Manasi River Basin is one of the main agricultural oases in Xinjiang,its development is restricted by soil salinization. How to survey soil salinization becomes as a primary problem in the study area. In this paper,the relationship between the Modified Soil-adjusted Vegetation Index (MSAVI) and salinization index (SI) was analyzed based on the Landsat-OLI image and field survey data. MSI model was established based on the concept of MSAVI-SI feature space. The results are as follows: ① There was an obvious difference of MSI values (0.35-0.43) of saline soil with different salinization degrees,which indicated that the MSI model was suitable for surveying soil salinization in the study area; ② Soil salinization was very serious in the irrigated area of the Manas River Basin,especially in the areas with fragile ecology in the lower reaches. Because the groundwater level in the middle reaches was high,soil salinization was still one of the important factors resulting in soil degradation in the irrigated area. This research could provide a reference for the information management of soil salinization and ecological environment protection.

Key words: soil salinization, modified soil-adjusted vegetation index(MSAVI), salinization index(SI), feature space, irrigated area, Manas River Basin, Xinjiang

ZHANG Tian-you, WANG Ling, ZENG Pan-li, WANG Tian, GENG Ya-hui, WANG Hui. Soil Salinization in the Irrigated Area of the Manas River Basin Based on MSAVI-SI Feature Space[J].Arid Zone Research, 2016, 33(3): 499-505.

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Soil Salinization in the Irrigated Area of the Manas River Basin Based on MSAVI-SI Feature Space

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