中文摘要：

本文对6个不同坡度和6个不同流量条件下的海涂盐碱土坡面进行上方来水径流冲刷试验，对试验中得到的盐土坡面冲刷侵蚀产沙率和几个典型的径流水动力学参数与坡度、流量的相关关系以及产沙率与各参数之间的相关关系进行分析，研究其抗冲刷性能。结果表明，产沙率Rs分别与坡度呈良好的线性正相关关系，与流量呈良好的对数关系。雷诺数Re与流量呈线性正相关而与坡度无显著相关关系。坡面水流剪切力τ和水流功率ω与流量和坡度均呈线性正相关关系。剪切力τ、水流功率ω与产沙率对数相关，都可以很好的预测不同坡度和流量条件下的产沙率。对比相关系数，水流功率ω能更精确预测产沙率Rs。该研究结果可为海涂围垦区盐碱土地工程边坡的土壤侵蚀预报模型的建立研究提供科学依据。

英文摘要：

The objective of this study was to identify the soil anti-scourability in the engineering slope of tidal marsh saline-alkali land. For this purpose, the relationships between unit sediment load （Rs） of silt soil slopes, its hydraulic characteristics, slope gradient, and runoff discharges were analyzed through the runoff scouring experiments under six different slope gradients and six different runoff discharges. The results showed that theRs presented a positive liner relationship with slope gradient and increased logarithmically with runoff discharges. Reynolds number （Re） had a positive liner relationship with the runoff discharge but did not have any obvious relationships with slope gradient. The stream average shear force （τ） and the stream power （ω） had positive liner relationships with the runoff discharge and slope gradient. TheRs increased logarithmically with the stream average shear force （τ） and the stream power （ω）. Theω and τ were all good hydraulic indicators for the unit area sediment load under different slope gradients and runoff discharges. It was clearly indicated by the related coefifcient that the stream power （ω） was the best for predictingRs in runoff scouring experiments. The above results will provide scientiifc basis for the research progress in the model development of soil erosion in the engineering slope of tidal marsh saline-alkali land.