河道挟沙能力法及其在流域水资源利用中的应用

River Sediment Carrying Capacity Method and Application in Basin Water Resources Utilization

目前流域水资源开发利用中常采用的输沙水量计算方法虽计算简便,但难以反映水量过程不同对输沙能力的影响,且回避了河道水沙关系演变问题。以大凌河朝阳站为例,根据泥沙动力学机理及水文站积累大量年月水沙资料,建立了以河道流量为自变量的挟沙能力函数,从而反映河道水量长系列过程的总输沙能力,并分析了人类活动特别是水库对河流水沙关系的定量影响。

Although the present calculation methods of sediment transport water demand in basin water resource utili- zation are implemented simply, it is difficult to reflect the impact of different water yield process on sediment transport ca- pacity and avoid the evolvement of relationship between water and sediment. Taking Chaoyang hydrologic station in Da- ling River for an example, according to the sediment dynamics theory and accumulated enormous water-sediment data in hydrologic stations, the function of sediment carrying capacity is established by taking river discharge as independent vari- able. Thus, it reflects the total sediment transport capacity in process of water yield long series. The influence of human activities especially the reservoir on the relationship between water and sediment is also analyzed.