The coastal erosion and evolution of the Yellow River Delta abandoned lobe
A statistic analysis predicting coastal change of the Yellow River abandoned delta lobe formed from 1964 to 1976 using Landsat TM imagery was conducted by calculating the coastal erosionJ.accumulation rates obtained from four different classic profiles and plotting the change curves of coastline with time. The studies showed that the regularity of the evolution of the coastline was very obvious after the delta lobe was abandoned. The coastal evolution can be divided into three different phases: erosion phase, transition phase and cyclical change phase. At present, the coast has evolved to the cyclical change phase. The natural coastline change cycle is 4 years between the dam and is 5 years to the west of the dam. In the cyclical change phase, the quasi-equilibrium line of the coast was located near the coastline of 1996, the current coast may recede 1.79 km to reach the natural equilibrium coastline. Therefore, some measures must be taken to protect the dam or the dam will be destroyed by the force of nature. The curves also revealed the magnitude of erosionJ.accumulation rates would decrease gradually with time. The results of the study offer guidance for coast protection, and proves that the evolution of silty coast actually was a cyclical change process too.
Key wordsLandsat TM remote sensing Yellow River Delta coast erosion erosion quasi-equilibrium line
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- Barale V Folving, 1996. Remote sensing of coastal interactions in the Mediterranean region.Ocean & Coastal Management, 30: 217–233.Google Scholar
- Di Kaichang, Ding Qian, Chen Weiet al., 1999. Shallow Water Depth Extraction and Chart Production from TM Images in Nansha Islands and Nearby Sea Area.Remote Sensing For Land & Resources, 3: 59–64. (in Chinese)Google Scholar
- Li Guangxue, Cheng Guodong Li Shaoquan, 1987. Evolution of the delta coast of the modern Huanghe River.Marine Geology & Quaternary Geology, 7(suppl): 81–89. (in Chinese)Google Scholar
- Lin Mingji, 1991. Remote Sensing Application to Marine and Coastal Zones. Beijing: China Ocean Press, (in Chinese)Google Scholar
- Liu Yong, Li Guangxue, Deng Shengguiet al., 2002. Evolution of erosion and accumulation in the abandoned subaqueous delta of the Yellow River.Marine Geology & Quaternary Geology, 22(3): 27–33. (in Chinese)Google Scholar
- Zhan Qiren, Zhao Jun, 1990. Compilation of 1:50 000 land-use maps on the Loess Plateau by using landsat TM images.Journal of Northwest University, 50–55. (in Chinese)Google Scholar