Spatiotemporal Changes of Soil Salinization in the Yellow River Delta of China from 2015 to 2019

Soil salinization poses a significant challenge for achieving sustainable utilization of land resources, especially in coastal, arid, and semi-arid areas. Timely monitoring soil salt content its spatial distribution is conducive to secure efficient agricultural development these regions. In this study, address the persistent problem Yellow River Delta China, feature space method was used construct multiple spaces surface albedo (Albedo)–modified soil-adjusted vegetation index (MSAVI), salinity (SI)–Albedo, SI–normalized difference (NDVI), an optimal inversion model developed. Based on Landsat 8 Operational Land Imager (OLI) image data simultaneous field-measured sampling data, from 2015 2019 obtain region at 30 m resolution. The results show that proportion approximately 76% 70%, respectively, overall showed downward trend. salinization-mitigated areas are primarily distributed southwest Delta, aggravated northeast southeast. general, variation characteristics increasing trend eastern coastal areas, corresponding formation mechanism accumulation region. Further, countermeasures suggestions were proposed different levels. Meanwhile, study revealed SI–Albedo most suitable