文献类型： 外文期刊

作者： Yahiaoui, Ibrahim ¹ ; Douaoui, Abdelkader ¹ ; Zhang Qiang ⁴ ; Ziane, Ahmed ¹ ;

作者机构： 1.Univ Djilali Bounaama Khemis Miliana, Lab Crop Prod & Sustainable Valorizat Nat Resourc, Khemis Miliana 44225, Algeria

2.Univ Sci & Technol Houari Boumed, Fac Biol Sci, Lab Plant Ecol & Environm, Algiers 16111, Algeria

3.Univ Ctr Morsli Abdellah, Tipasa 42000, Algeria

4.Shanxi Acad Agr Sci, Inst Agr Environm & Resources, Taiyuan 030006, Peoples R China

关键词： Landsat ETM;morphology;sampling;salinity;prediction;Lower Cheliff plain

期刊名称：JOURNAL OF ARID LAND （ 影响因子：2.299； 五年影响因子：2.459 ）

ISSN： 1674-6767

年卷期： 2015 年 7 卷 6 期

页码：

收录情况： SCI

摘要： Soil salinity and ground surface morphology in the Lower Cheliff plain (Algeria) can directly or indirectly impact the stability of environments. Soil salinization in this area is a major pedological problem related to several natural factors, and the topography appears to be important in understanding the spatial distribution of soil salinity. In this study, we analyzed the relationship between topographic parameters and soil salinity, giving their role in understanding and estimating the spatial distribution of soil salinity in the Lower Cheliff plain. Two satellite images of Landsat 7 in winter and summer 2013 with reflectance values and the digital elevation model (DEM) were used. We derived the elevation and slope gradient values from the DEM corresponding to the sampling points in the field. We also calculated the vegetation and soil indices (i.e. NDVI (normalized difference vegetation index), RVI (ratio vegetation index), BI (brightness index) and CI (color index)) and soil salinity indices, and analyzed the correlations of soil salinity with topography parameters and the vegetation and soil indices. The results showed that soil salinity had no correlation with slope gradient, while it was significantly correlated with elevation when the EC (electrical conductivity) values were less than 8 dS/m. Also, a good relationship between the spectral bands and measured soil EC was found, leading us to define a new salinity index, i.e. soil adjusted salinity index (SASI). SASI showed a significant correlation with elevation and measured soil EC values. Finally, we developed a multiple linear regression for soil salinity prediction based on elevation and SASI. With the prediction power of 45%, this model is the first one developed for the study area for soil salinity prediction by the combination of remote sensing and topographic feature analysis.