The Yom River is one of the four major sediment sources to the Chao Phraya River in Thailand. Human activities and changes in climate over the past six decades may have affected the discharge and sediment load to some extent. In the current study, the river discharge and sediment characteristics in the mainstream of the Yom River were investigated using the field observation data from 2011 to 2013 and the historical river flow and sediment data from 1954 to 2014 at six hydrological stations operated by the Royal Irrigation Department of Thailand (RID). The non-parametric Mann-Kendall test and double mass curve were used to analyze the sediment dynamics and temporal changes in the discharge of the Yom River. The results revealed that the sediment was mainly transported in suspension, and the bed-to-suspended sediment loads ratio varied between 0 and 0.05. The daily suspended sediment load (SSL) in the upper and middle basins had a strong correlation with the daily discharge and could be represented by power equations with coefficients of determination higher than 0.8. The daily suspended sediment load in the lower basin did not directly depend on the corresponding discharge because of the reduction in river slope and water diversion by irrigation projects. It also appeared that the river discharges and sediment loads were mainly influenced by climate variation (floods and droughts). Moreover, the average sediment transport of the upper, middle, and lower reaches were 0.57, 0.71, and 0.35 million t/y, respectively. The sediment load in the lower basin decreased more than 50% as a result of changes in the river gradient (from mountainous to floodplain areas). The results from sediment analysis also indicated that the construction of the Mae Yom Barrage, the longest diversion dam in Thailand, and land-use changes did not significantly affect the sediment load along the Yom River.

赎罪河是泰国湄南河的四大沉积物来源之一。在过去的六十年中，人类活动和气候变化可能在一定程度上影响了排放量和泥沙量。在当前的研究中，使用2011年至2013年的现场观测数据以及1954年至2014年皇家灌溉的六个水文站的历史河流流量和泥沙数据，对Yom河干流的河流流量和泥沙特征进行了调查。泰国部（RID）。使用非参数Mann-Kendall检验和双重质量曲线分析了Yom河流量中的沉积物动力学和时间变化。结果表明，沉积物主要以悬浮液形式运移，床与悬浮沉积物的负荷比在0到0.05之间变化。上部和中部盆地的日悬浮泥沙负荷（SSL）与日排放量有很强的相关性，可以用幂方程表示，其确定系数高于0.8。由于减少了河道坡度和灌溉工程引水，下流域的日悬浮泥沙负荷并不直接取决于相应的流量。看来，河流流量和泥沙负荷主要受气候变化（洪水和干旱）的影响。此外，上游，中部和下游的平均输沙量分别为0.57、0.71和35万吨/年。由于河流坡度的变化（从山区到洪泛区），下游盆地的泥沙负荷减少了50％以上。沉积物分析的结果还表明，泰国最长的引水大坝Mae Yom Barrage的建设以及土地利用的变化并没有显着影响Yom河沿岸的泥沙负荷。