tidal migration

But it is quite important, if the sediments are transported by the type of swash bars, which act at the middle ebb tidal delta and bring about the deposition and migration for the navigation course.

但是，以冲激沙坝方式的泥沙转移殊为重要，航道的淤积和偏移都与它的活动有关。

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Now it is a critical and difficult technical point to establish suitable tidal current model, migration and diffusion model, and then forecast the action of leakage dangerous chemicals accurately.

目前建立适宜的流场和扩散模型，对泄漏危化品行为进行准确地预测预报是关键技术难点。

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