基于高分一号遥感卫星的渤海湾悬浮泥沙时空分布反演

悬浮泥沙是评价II类水体水质的重要参数之一,近海岸水域悬浮泥沙对重金属、营养盐等具有一定的吸附作用,悬浮泥沙的分布特征在一定程度上反映着污染物的迁移和循环,因此研究悬浮泥沙对渤海湾建设和环境保护具有重要意义。为探究渤海湾水域悬浮泥沙浓度 和分布的变化特征,利用高分一号多光谱卫星影像,通过采用波段组合的方式对悬浮泥沙含量指数反演提取,反演得到2019年9个月的渤海湾悬浮泥沙指数,分析发现渤海湾悬浮泥沙含量在冬季受季风影响较高,春季和夏季的时候渤海湾高浓度悬浮泥沙向近岸收缩,秋季 悬浮泥沙分布格局有正在向冬季过渡的趋势,本文研究可为渤海湾的生态环境保护和工业开发提供重要的科学依据和参考价值。

Retrieve of Spatial and Temporal Distribution of Suspended Sediment in Bohai Bay Based on GF-1 Remote Sensing Satellite

Suspended sediment is one of the important parameters to evaluate the quality of Case II Waters. As the suspended sediment in coastal waters has a certain adsorption effect on heavy metals and nutrients, its distribution characteristics can reflect transferring and circling of pollutants to some extent. Therefore, the study of suspended sediment is of great significance to the construction and environmental protection of Bohai Bay, China. In order to explore the variations of sediment index and distribution of suspended sediment in Bohai Bay, the suspended sediment index of the Bohai Bay is retrieved by band combination from the multi-spectral satellite image of GF-1, and the suspended sediment indexes of the nine months in 2019 are obtained. It is found that the suspended sediment in Bohai Bay is greatly influenced by monsoon in winter, and in spring and summer, the suspended sediment of high concentration shrinks towards nearshore. Besides, the distribution pattern of suspended sediment in fall has a trend of transition to that of winter. The study provides an important scientific basis and reference for the ecological environment protection and industrial development in Bohai Bay.