It is indicated that the distance from the tidal reach to the estuary should be highly concerned in determination of data age and selection of methods for navigable stage design.
研究结果表明，感潮河段设计通航水位方法的选取以及所需样本年限的长短与其距河口的距离有密切关系。
2
In the second stage (Taiyuan Age), sub-tidal, tidal flat and delta occurred alternatively.
第二阶段（太原组）潮下带、潮坪、三角洲环境交替出现；
3
Because of complex influence of runoff and tide in tidal reaches, how to make decision method and standard of designed navigable stage have not been known up to now.