天然河流悬沙测量方法的简化(以印尼日惹库宁河为例)

B. A. Kironoto, B. Yulistiyanto, B. Giarto, M. Kiptiah, Muhammad Lutfi Tantowi
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引用次数: 0

摘要

悬浮物的堆积降低了河流的容量,使水质恶化。日惹的库宁河是印尼日惹的主要河流之一,目前面临着悬浮沉积物的问题。因此,为了减少悬沙的影响并确定预防措施,有必要对悬沙流特性进行研究。因此,本研究旨在研究悬沙流动特征,即通道横向上特定点的流速和浓度分布,以及悬沙流量的相关性。在库宁河沿岸6个不同地点测量了30条流速和悬沙浓度剖面。Opcon探针测量悬浮泥沙浓度,螺旋桨流速仪测量平均点速剖面。本研究结果表明,河道中部的悬沙输沙比大于靠近河道边缘的悬沙输沙比。z/B中值为1的位置出现在z/B = 0,19和z/B = 0,75,这取决于沟道截面的不规则性。在实际应用中,可以通过y = 0,2d, 0,4d和0,8d的1、2和/或3点测量来确定深度平均速度和悬沙浓度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Simplified of Suspended Sediment Measurement Method in Natural River (Case study of Kuning River in Yogyakarta, Indonesia)
The accumulation of suspended sediment reduces the capacity in the river and deteriorates the water quality. Kuning  River in Yogyakarta is one of the main rivers in Yogyakarta, Indonesia, which is currently facing the issue of suspended sediments. To reduce the effect of suspended sediment and determine a preventive measure, hence, it is necessary to study the characteristics of the suspended sediment flow. Therefore, this study aims to investigate the suspended sediment flow characteristics, i.e. the velocity, and the concentration profiles at specific points in the transverse direction of the channel as well as the correlation of the suspended sediment discharge. Thirty (30) profiles of velocity and suspended sediment concentration were measured at six different points along the Kuning River. Opcon probe was used to measure suspended sediment concentration, while the propeller current meter was used to measure mean point-velocity profiles. Results of this study show the suspended sediment discharge ratio, defined as  are higher in the middle part of the channel than the one near the edge of the channel. The position of z/B where the values of  1 occurs at z/B = 0,19 and z/B = 0,75, which depend on the irregularity of the channel cross-sections. For practical purposes, the depth-averaged velocity and suspended sediment concentration can be determined from 1, 2 and/or 3 points measurement at y = 0,2D, 0,4D and 0,8D.
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