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1995年10月在小东海珊瑚礁海岸的礁坪上进行示踪砂运移的现场实验。本次实验对浪、流以及示踪砂采样作了同步观测。根据所获的实验数据,分析了在9516号热带风暴天气过程礁坪上示踪砂运移的基本规律。在一级近似下,测定并计算了泥沙在波生流作用下的漂移速度与流速比因子为0.002,混合深度小于2cm。这一结果与其它已往结果相比明显小得多。通过现场比较,作者认为引起此差异的原因为:1）示踪砂的投放远离波浪破碎带,破碎波的影响很小,因此引起泥沙运移的动力条件比已往沙质海滩的示踪砂为弱;2）珊瑚礁海岸的糙率较砂质海滩大。
October 1995 Field experiment on tracer sand migration on the reef off the coast of the Little East China Sea. This experiment on the waves, sand and tracer sand samples were observed simultaneously. Based on the experimental data obtained, the basic law of tracer sand transport on the reef in tropical cyclone weather 9516 is analyzed. Under the first-order approximation, the drift velocity-velocity ratio of sediment under the action of swirling flow was measured and calculated to be 0.002, and the mixing depth was less than 2 cm. This result is significantly smaller than the other previous results. The reasons for this discrepancy are as follows: 1) The tracer sand is far away from the wave breaking zone and the impact of breaking wave is very small. Therefore, the dynamic conditions of sediment transport are better than the tracer sand of the past sandy beach Weak; 2) Coral reef coast roughness than sandy beach.