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一、前言滦河发源于巴延图古尔山,流经内蒙高原和燕山山地,在滦县出山区进入平原,至乐亭县汇入渤海。全长877公里,流域面积44900平方公里,年平均流量148米~3/秒,输砂量达2670万吨/年,是一条多沙性河流。滦河进入平原以后,大量泥沙堆积于河口地区,加之海水的作用,形成了滦河三角洲平原。由于滦河的多次改道,泥沙的堆积随着河口位置的迁移而变化。因而老的三角洲随着泥沙来源的中断而遭到不同程度的破坏,新的三角洲不断发育。在这种变化过程中,各种元素的迁
I. Introduction Luanhe originated in Bayan Tugur Mountain, flows through the Inner Mongolia Plateau and Yanshan Mountains, Luanxian mountains into the plain, to Laoting County into the Bohai Sea. A total length of 877 kilometers, the basin area of 44,900 square kilometers, the average annual flow of 148 meters ~ 3 / sec, the amount of sand transported 26.7 million tons / year, is a multi-sandy river. Luanhe into the plains, a large number of sediment accumulation in the mouth area, coupled with the role of seawater, formed the Luanhe Delta plain. Due to the diversion of the Luan River several times, sediment accumulation changes with the relocation of the estuary. As a result, the old delta was destroyed to varying degrees with the disruption of sediment sources and the new delta continued to develop. In this process of change, the relocation of various elements