黄河三角洲废弃叶瓣海岸侵蚀与岸线演化

doi:10.11821/xb200405011

Abstract

Abstract:

The statistical results of predicting coast change of the Yellow River abandoned delta lobe formed from 1964 to 1976 are put forward using Landsat TM imagery. The velocity of coast erosion or accumulation obtained from four different classic profiles selected were calculated and its change curves with time were plotted. The curves suggested that the regularity of the evolution of coastline after the delta lobe was abandoned is very obvious. It can be divided into three different phases: erosion phase, transition phase and cyclical change phase. The coastline change cycle located in between the two dams is 4 years and that located to west of the dams is 5 years. The analysis shows that the quasi-equilibrium line of coast is located near the coastline of 1996. The coast in the dam areas will recede 1.79 km to reach to equilibrium line. Therefore, effective measures must be taken to protect the dam. But the magnitude of evolution velocity will decrease with the elapse of time and at the same time it proved that the evolution of silty coast actually was a cyclical change process too.

Key words: Yellow River Delta abandoned lobe, remote sensing, coast erosion, erosional quasi-equilibrium line, Shandong

LI Anlong, LI Guangxue, CAO Lihua, ZHANG Qingde, DENG Shenggui. The Coast Erosion and Evolution of the Abandoned Lobe of the Yellow River Delta[J].Acta Geographica Sinica, 2004, 59(5): 731-737.

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The Coast Erosion and Evolution of the Abandoned Lobe of the Yellow River Delta

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