河流中的悬浮固体浓度(SSC)与河水浊度密切相关。在这项研究中,对它们之间关系的调查伴随着观察到的浊度和SSC值,这些数据是从水样的测试结果和水流中监测的条件中获得的。水样是从本港荔枝窝集水区两个泥沙浓度范围广泛的观测站收集的,中国。我们将目标降雨事件分为单峰事件类型和双峰事件类型,以区分讨论SSC与浊度之间的关系。在更精细的分类中,每个事件都分为定义的过程进行分析,其中两个主要过程是指SSC首先从正常状态上升到峰值状态的时期,以及随后SSC逐渐下降到正常状态的时期。分析结果建议,通过浊度值估算SSC应基于上游站的相同降雨类型。然而,结果表明,降雨类型的分类不需要考虑下游地区。此外,当前的研究表明,在不同阶段(特别是指上升期和下降期),SSC与浊度值之间的单独建立的联系可以通过该站点和其他无测量站点的连续浊度值来估算同一站点的SSC未来具有相似地形特征的站点。同时,这种研究方法提供了新的见解,探索沉积物在整体降雨事件中不同阶段的各种行为。比较降雨事件中相应阶段沉积物的出色表现,有助于山区河流中SSC与浊度之间的不同关系。
Suspended solids concentration (SSC) in a river is closely relevant to river water turbidity. Investigation of their relationship in this
study is accompanied by observed turbidity and SSC values, which were obtained from the testing results of water samples and monitored conditions in streamflow. The water samples were collected from two observation stations with a broad range of sediment concentrations in the Lai Chi Wo catchment in Hong Kong, China. We classified the target rainfall events into single-peak event type and dual-peak event type for a distinguished discussion of the relationship between SSC and turbidity in this
study. At a finer classification, each event is separated into defined processes for the analysis, where two main processes refer to the periods that SSC rises from a normal state to a peak state first and the followed periods that SSC recesses to ordinary status gradually. It is advised by the analysis results that the estimation of SSC through turbidity values should be based on the same rainfall types for the upstream station. However, the results show that the classification of rainfall types does not need to take downstream areas into consideration. Furthermore, current research implies that the individual established connections between SSC and turbidity value at different stages (particularly referring to the rising period and recessing period) could be applied to estimate SSC at the same station via continuous turbidity values for both this and other ungauged stations with similar topographical features in the future. Meanwhile, this research approach provides new insight exploring various behaviors of sediments at different stages during an integral rainfall event. A comparison of distinguished performances of sediment during corresponding stages in a rainfall event makes contributions to diverse relationship between SSC and turbidity in the mountainous river.