Water and suspended sediment discharges for the Mekong Delta, Vietnam (2005-2015)

This dataset describes hourly time series of discharge and suspended sediment flux at four sites in the Vietnamese Mekong Delta (Chau Doc, Tan Chau, Can Tho and My Thaun) for the period 2005 – 2015. This data was calculated from historic Acoustic Doppler Current Profiler (aDcp)data obtained as part of routine flood monitoring conducted by the Vietnamese Hydrological Agency. The data were collated by the authors. The data were processed to back out sediment fluxes through the delta through calibration of the acoustic backscatter signal to suspended sediment concentrations collected in Chau Doc (May 2017) and Can Tho (September 2017). For each aDcp instrument acoustic backscatter signal was calibrated to observed suspended sediment concentrations (SSCs). These concentrations values were then matched to measured acoustic backscatter values (dB) from the depth at which each sample was taken to generate power law calibration curves. To generate daily fluxes, the point specific ADCP fluxes were used to generate sediment ratings curves between sediment flux (kg/s) and discharge (m3/s). These ratings curves were then propagated over recorded daily discharge values measured by the Vietnamese hydrological agency to provide daily fluxes over the period of record. The work was funded through NERC grant reference NE/P008100/1 - Deciphering the dominant drivers of contemporary relative sea-level change: Analysing sediment deposition and subsidence in a vulnerable mega-delta. Full details about this dataset can be found at https://doi.org/10.5285/ac5b28ca-e087-4aec-974a-5a9f84b06595本数据集记录了越南湄公河三角洲四个站点（朱笃（Chau Doc）、谭洲（Tan Chau）、芹苴（Can Tho）和美顺（My Thaun)）2005年至2015年的逐小时流量与悬沙通量时间序列。该数据由越南水文局开展常规洪水监测期间获取的历史声学多普勒流速剖面仪（Acoustic Doppler Current Profiler，ADCP）数据计算得到，由本文作者整理汇编。研究人员通过将声学背散射信号校准至2017年5月在朱笃、2017年9月在芹苴采集的悬沙浓度数据，反推得到三角洲的泥沙通量。针对每台ADCP仪器，将其声学背散射信号与对应采样深度处测得的悬沙浓度（Suspended Sediment Concentrations，SSCs）进行校准，随后将这些浓度值与实测声学背散射值（单位：分贝dB）进行匹配，以构建幂律校准曲线。为生成日通量数据，研究人员利用ADCP的逐测点通量数据，构建了泥沙通量（单位：千克每秒kg/s）与流量（单位：立方米每秒m³/s）之间的泥沙等级曲线。随后将该等级曲线应用于越南水文局记录的逐日流量数据，从而得到研究时段内的逐日泥沙通量。本研究由英国自然环境研究理事会（Natural Environment Research Council，NERC）资助，项目编号为NE/P008100/1，主题为“解析当代相对海平面变化的主导驱动因子：脆弱巨型三角洲的泥沙沉积与地面沉降分析”。本数据集的完整详细信息可通过以下链接获取：https://doi.org/10.5285/ac5b28ca-e087-4aec-974a-5a9f84b06595