ABSTRACT

Magnitude frequency analysis of suspended sediment transport provides important information on the sediment transport characteristics of a river. Understanding the sediment transport characteristics of rivers plays a vital role in the management of water resource projects. The lower Drava River basin is one of the most extensively hydroelectrically exploited river basins in the world. In this regard, analysis of the sediment transport characteristics in the region is critical. In the present study, magnitude frequency analysis was performed for the Botovo and Donji Miholjac gauging stations on the lower Drava River. It was observed that discharges close to the average daily discharge are responsible for transporting a major fraction of suspended sediment at both stations. The effective discharge was found to be less than half of Q_1.5 and Q₂. It was also observed that data aggregation affects the effective discharge. Estimation of factor load discharge reveals that discharge with a return interval of around 1 year in the annual maximum discharge time series transports 90% of the total sediment load in the lower Drava River.

摘要

悬浮泥沙输送的幅值频率分析提供了有关河流泥沙输送特征的重要信息。了解河流的泥沙输送特性在水资源项目的管理中起着至关重要的作用。德拉瓦河下游流域是世界上水力发电最广泛的流域之一。在这方面，分析该区域的泥沙输送特性至关重要。在本研究中，对德拉瓦河下游的Botovo和Donji Miholjac测量站进行了幅度频率分析。据观察，流量接近每日平均流量是造成两个站台大部分悬浮泥沙输送的原因。发现有效放电小于Q的一半_1.5和Q ₂。还观察到数据聚集会影响有效放电。因子负荷流量的估算表明，在每年最大排放时间序列中，返回间隔为1年左右的流量在下游Drava河中输送了90％的总泥沙量。