Study on the geomorphic evolution of the muddy coast along the southern-western Laizhou Bay over the past 50 years
Taking the 4-phase MSS/ETM+ remote sensing images from 1976 to 2009 and sea charts surveyed in 1958, 1984and 2002 respectively as main data sources, the dynamical geomorphic evolution of the muddy coast along the southeruwestern Laizhou Bay in the past 50 years has been studied by using 3S (RS/GIS/GPS).According to the results, taking the Qingtuozi as the boundary, the geomorphic evolution of the western and southern coasts along the bay shows distinctively different over the past 50 years, though both parts are made up of the muddy sediments.Details are shown as follows: the evolution of the coastline and isobaths between the two parts are not synchronized, and amplitude of the changes presents greatly different, as well as the disparate patterns.There remains great difference in the spatial distributions of the coastal geomorphic types between the two parts, and its transferred rate, net-direction and amplitude are obvious discrepant.Erosion of the offshore slopes between of the two parts has great gap too.Coastal geomorphologicsal of the western Laizhou Bay which has a positive correlation with the evolution of Yellow River estuary-delta, makes a drastically changes, and suffers an obvious influence from the human activities in the late period.The geomorphic evolution of the southern coast is affected by human activities either, but it almost has nothing to do with the severe evolution in the Yellow River delta of the western bay.The decrease and even the cutoff of the water and sediment discharge from Yellow River into the sea in the western bay have no significant effects on the erosion-deposition of the southern coast too.
geomorphic evolutionmuddy coastYellow River estuary-deltasouthern-western Laizhou Bay
NETL
NSTL
万方数据
