摘要
河道输沙同流域的产流、产沙特性紧密相联．受流域内植被、土壤、地质、土地利用状况及人类活动等因素的影响。流域产流面积的空间变化对其产沙、供沙的时空输入特性具有制约作用。不同的河段位置．河道的水力几何形态，非恒定的洪水波运动将直接影响到河道的输沙特性。水沙关系的基本经验模式为：Ｑｇ＝ＡＱｓｂ受其气候环境、区域环境及季节变化的影响，模拟及预报的精度受到限制。需从多因素、分散型模型应用的角度考虑加以改进。
Abstract Suspended sediment transport in streams is strongly relative to runoff generation and sediment yield,affected by vegetation, soil, geology, land use and man's activities in catchments. The spatial variability of runoff area has a great effect on the time-space input of sediment supply into rivers. different reaches,variation of stream hydraulic geometry and the unsteady movement of flood wave have direct impact on the sediment transport. The basic experiential form of sediment rating curve is Qg=aQsb, its accuracy of modelling and forecasting is limited because of the influence of climatical environment, local environment and seasonal change. It is necessary to consider multielement and use distributed models to study and improve the accuracy of rating curve modelling.Abstract
出处
《西北水资源与水工程》
1995年第2期21-26,33,共7页
Northwest Water Resources & Water Engineering
