陆地卫星相片的海岸带解译

海岸带是海洋与陆地交互作用的地带。海岸带的地貌和水文特征按潮汐海面可分为三带:高潮位以上的海滨,包括沿岸堤平原和海蚀阶地等,它们是古海洋作用的遗迹,一般不受现代海洋动力的影响,高潮位与低潮位之间的潮间带,它们随涨落潮而周期性地被淹;以及低潮位以下一直到波浪作用极限深度的水下岸坡,包括浅海和泻湖水域,属于水下环境。

INTERPRETATION OF LANDSAT IMAGERY OF COASTAL ZONES

The Landsat imageries of a coastal zone reveal spectrums of light reflected from various objects in that zone. The intensity of back-scattered light from sea water is directly proportional to the concentration of suspended matter in sea water.Over clear water,the intensity of reflecthd light from the bottom is a negative correlation to the depth of the water.Over relatively turbid waters of the nearshore zone, the bottom relief can be revaled indirectly through the variation in the turbidity of the water.The Landsat imageries of the stbaqueous parts of the deltas of Luan He, Huang He and Chang Jiang clearly show a succession of four deltas of Luan He, each younger than the one beside it;the branching of tributaries in the lower reaches of Huang He; the southward shifting of the sand bars in the estuary of the Chang Jiang. After a synthetcal study of the Landsat imagery of Shantung Peninsula, we have found that the tectonic nature differs between the north and south coast of the peninsula. The north coast is a leveled coast of emergence, while the south coast as a result of submergence, belongs to the ria type.