Remote Sensing Monitoring of Spatial–Temporal Variation of Soil Salinization before and after Irrigation in the Yellow River Delta

Sun, H.; Xu, L.; Wang, J., and Fu, X., 2020. Remote sensing monitoring of spatial–temporal variation of soil salinization before and after irrigation in the Yellow River Delta. In: Hu, C. and Cai, M. (eds.), Geo-informatics and Oceanography. Journal of Coastal Research, Special Issue No. 105, pp. 56–60. Coconut Creek (Florida), ISSN 0749-0208.To study the impact of irrigation on soil salinization in the Yellow River Delta, changes in soil salinization before and after irrigation were analyzed using Gaofen-1 wide-field-view remote sensing images and the soil salinization remote sensing monitoring index. The results show the following: (1) The correlation coefficient between the salinity index and the measured soil salinity was above 0.6, which met the requirements for soil salinization monitoring. (2) During irrigation, the area of nonsaline soil was more than 97%, and the saline soil was transformed into nonsaline soil. (3) About 1 week after irrigation, the area of nonsaline soil was reduced by 11%, and the nonsaline soil was transformed into light salinized soil and moderate salinized soil. This study provides an accurate, efficient, and widely applicable method for the study of soil salinization before and after irrigation.