Data supporting the paper “The dynamics of suspended sediment in a typical Alpine river reach: insight from a seasonal survey”.

These data were obtained during a field campaign performed on a typical Alpine river reach from the French Alps, La Séveraisse. During this campaign, we monitored the suspended load coming in the studied reach (upstream station location: Lat 44.819507°, Long 6.187550°) and exiting that reach (downstream station location: Lat 44.824502°, Long 6.149043°). Suspended fluxes were measured using gauging stations (continuous water level sensors, 10min frequency + gauging) and continuous turbidity sensors (10min frequency) coupled with automatic sequential samplers. Local river bed stocks measurements were also performed at the start of the field campaign and bedload measurements were performed at the downstream station on a nearly daily basis. This dataset comprises : - The local river bed stock measurements for each facies and surface/subsurface layers. The fraction of area occupied by each facies (image classification) is specified. - The downstream bedload measurements with the corresponding flow rates and the date of sampling. - The event-based data used to analyze the reach budget including (median values obtained from the Monte Carlo simulations): o The date of downstream peak o the downstream mass transported as suspension o the upstream mass transported as suspension o the mass difference (downstream-upstream) o the mass ratio (downstream over upstream) o the relative mass ratio (downstream-upstream relative to the upstream mass) o the result from the test of mass difference significance (YES= mass difference distributions are significantly different from 0) o the event average downstream flow rate o the event maximum downstream flow rate o the event average upstream suspended sediment concentration - 2h average values used to study how the different parameters control the reach budget dynamics: o The date o The 2h-average mass ratio (downstream over upstream) o The 2h-average normalized downstream flow rate (downstream flow rate over equilibrium flow rate (which is a function of time during the campaign)) o The 2h-average upstream suspended sediment concentration本数据集采集自法国阿尔卑斯山区典型阿尔卑斯河段——拉塞弗赖斯河（La Séveraisse）的野外科考作业。本次科考期间，研究团队对研究河段的上游（监测站坐标：北纬44.819507°，东经6.187550°）与下游（监测站坐标：北纬44.824502°，东经6.149043°）的悬移质（suspended load）输移情况开展了监测。 悬移质通量的测量采用了兼具10分钟采样频率的水位连续监测传感器与流量测算站，以及配套自动连续采样器的浊度连续监测传感器。此外，科考初始阶段开展了河床沉积物存量实地测量，并在下游监测站以近乎每日的频次开展推移质（bedload）输移测量。 本数据集涵盖以下内容： 1. 各沉积相（facies）及地表/地下层的河床沉积物存量测量数据，并标注了各沉积相所占面积占比（基于图像分类所得）。 2. 下游推移质输移测量数据，包含对应流量与采样日期。 3. 用于分析河段物质平衡的事件级数据（含蒙特卡洛（Monte Carlo）模拟得到的中位值）： o 下游峰值出现日期 o 下游悬移质输运总质量 o 上游悬移质输运总质量 o 质量差值（下游-上游） o 质量比值（下游/上游） o 相对质量比值（下游与上游的质量差值相对于上游质量的比值） o 质量差值显著性检验结果（"YES"代表质量差值分布与0存在显著差异） o 事件平均下游流量 o 事件最大下游流量 o 事件平均上游悬移质浓度 4. 用于探究不同参数对河段物质平衡动态调控作用的2小时平均值数据： o 日期 o 2小时平均质量比值（下游/上游） o 2小时平均归一化下游流量（下游流量与平衡流量的比值，其中平衡流量随科考期间的时间动态变化） o 2小时平均上游悬移质浓度