长周期动力地形模型中代表输入条件

Representative conditions of the long-term morphodynamic model

摘要: 长周期动力地形模型是模拟长时间尺度地形演变过程的一种过程模型,其代表性输入条件是模型输入的一个关键问题.为了给出长周期动力地形模型中合适的代表性输入条件,采用比较代表条件与真实条件下泥沙输运率近似的方法,确定合理的代表潮,通过计算分析,地形复杂的古珠江河口湾宜采用大于平均潮差约12.5%的3个代表潮为输入条件,这样,代表潮与真实潮产生的泥沙平均输运率,无论大小还是方向误差最小.

Abstract: The long-term morphodynamic model is used to simulate morphologic evolution process in a long time scale,its key is to define the model representative input condition.Based on the research purpose,the sediment transport rate is compared under the repersentative condition and the natural input to confirm reasonable representative tide.According to the compute and the analysis,three representative tides with 12.5% more than mean tide range are selected for the typical conditions in the complex paleo-Pearl River estuary bays.