Effect of spatio-temporal change of land use on soil salinization in the yellow river delta

Abstract

Using remote sensing and GIS technology, through to the data of soil salinization and land-use and land-cover change (LUCC) in the four phases of the Yellow River Delta by retrieving and interpreting the four remote sensing images of 1984, 1995, 2005 and 2016, The paper analyzed the temporal and spatial variation of soil salinization degree and LUCC in the research area. The research presented a model of salinization detection index to monitor severity of salinization. The results showed that the correlation between the salinity index and soil salt content had a higher accuracy. Different land use types had a certain indication for the degree of soil salinization. The total trend of soil salinization degree of each land use types was cultivated land, grassland, construction land and mudflats from largest to smallest. Land reclamation and pasture degeneration are one of the main factors that aggravate the salinization and enlarge the area in recent years.