基于Worldview-2多光谱卫星数据的浅水水深遥感反演

Shallow Water Depth Inversion Based on Worldview-2 Multispectral Data

随着卫星遥感技术的不断发展,高分辨率卫星影像逐渐应用到水深遥感反演领域。利用Worldview-2高分辨率卫星数据和电子海图数据,基于双波段比值法,反演获得实验区域20m以浅的水深。实验表明,Worldview-2等高分辨率多光谱卫星数据,具有一定反演浅水水深的能力,但在5m以浅的水域反演误差较大;双波段比值法,这种半经验半理论的模型,在水深遥感反演中具有更好的适用性;对比了一次线性、二次多项式、指数、对数等拟合方法,发现对数拟合的方法获取绝对水深,其精度相对其他方法更高。

As the basic hydrology factors,depth is an important content of Marine surveying and mapping,and it also plays an important role in water depth measurement for water conservancy, shipping and offshore engineering.With the development of satellite remote sensing technology, the high spatial resolution satellite imagery is gradually applied to the depth remote sensing inversion.In this paper, the Worldview-2 data and electronic chart data are used to water depth inversion by dual band ratio model below the 20 meters in the case 1 shallow water area.The experiments show that as the high resolution multispectral satellite data, Worldview-2 have ability to the inversion of shallow water depth,but water depth inversion error is bigger in area below 5m. Dual band ratio method, this kind of half experience and half theory model, has better applicability in water depth remote sensing inversion. Compared with a linear, quadratic polynomial, index and logarithmic methods to explore the water depth mapping ability, we come to the conclusion that the logarithmic fitting method to obtain absolute depth is better than others with higher precision.