黄河上中游产水产沙系统与下游河道沉积系统的耦合关系

本文在黄河为例，动用数理统计方法，研究了河流流域系统中产水产沙子系统与河道沉积子系统之间的关系，得到了描述这种耦合关系的多元回归模型。运用这一模型，可以定量回答来自上中游不同来源区的泥沙，各有多大比例淤在下游河道中的问题。

A STUDY ON THE COUPLING RELATION BETWEEN THE WATER AND SEDIMENT YIELD SUB SYSTEM AND RIVER CHANNEL DEPOSITION SUB SYSTEM: AN EXAMPLE FROM THE YELLOW RIVER

Based on the data from the Yellow River, by applying the concept of system coupling, this paper deals with the coupling relation between the water and sediment yield sub system in the upper and middle river basin and the sediment deposition sub system at the lower river reaches. To describe this coupling relation quantitatively, a multi regression model has been setablished to express the relation between the sedimentaton in the lower Yellow River and the water and sediment quantities from the 4 different source areas in the upper and middle river basin, based on the yearly and the flood event data, respectively. The results obtained show that, on the basis of yearly data, given other factors, each ton sediment from the coarser sediment producing area causes a sedimentation of 0.445 ton, but for each ton sediment from the fine sediment producing area, this sedimentation is only 0.154t, meaning that the effect of the former in causing sedimentation is two times higher than the latter. This indicates that the sediments from coarser and finer sediment producing areas have different influence on the sedimentation process in the lower Yellow River.