Among totally 242 spectral bands ranging from 400 to 2500 nm of Hyperion hyperspectral remote sensing data, it was
found that two bands with reflectance of 1215 and 2133 nm had relatively good correlation with sediment grain-size
parameters of mean diameter(Mz), skewness(Sk), medium diameter(Md) and sorting coefficient(So). And further more,
the combination of band reflectance had a significant linear correlation with Mz, So, Sk and Md. Then linear regression
models were established and applied to get spatial distribution characteristics of grain-size parameters at intertidal flat
near the Sheyang River Estuary in Jiangsu Province. Verification by independent samples showed that the mean relative
precision and the mean absolute precision exceeded 75.70% and 72.17%, respectively. Spatial distribution pattern of
grain-size parameters indicated that in the direction from north to south that parallel to the coastal line, grain diameters
became finer, sorting characteristics became worse and skewness moved from near symmetry to positive deviation.
While at the direction from the land phase to the sea that perpendicular to coastal line, grain diameters changed coarser,
sorting characteristics became better and skewness moved from positive to near symmetry. These variation trends were
in accordance with hydrodynamic environments and sediments sources well.