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利用1997和2007年TM影像,结合GIS技术分析近10年来水利工程对鸭绿江河口三角洲的影响,同时,结合统计分析方法,应用马尔科夫模型预测了未来20年该区景观格局的演变趋势。结果表明:流域水利工程的建设使河口区来沙量减少,导致三角洲侵蚀加剧;大面积围垦使鸭绿江口西水道的纳潮量大幅减少,淤积严重;未来鸭绿江河口三角洲的演化仍向侵蚀方向发展,在达到稳定状态后,水域面积将占整个研究区的44.9%,使景观基质发生改变。
Using 1997 and 2007 TM images combined with GIS technology to analyze the impact of water conservancy projects on the Yalu River Delta in the past 10 years. At the same time, with the method of statistical analysis, Markov model is applied to predict the evolution trend of landscape pattern in this area in the next 20 years. The results show that the construction of river basin water conservancy project reduces sediment flow in the estuary area and leads to aggravating of the delta erosion. Large area reclamation drastically reduces the amount of nodules in the west channel of the Yalu River Estuary and causes serious sedimentation. In the future, the evolution of the delta of the Yalu River estuary still develops towards the erosion direction After reaching a steady state, the water area will account for 44.9% of the entire study area, which will change the landscape substrate.