某坝顶标高时，最高沉积滩面、库底、正常水位三者以上，最高洪水位以下的空间。

It refers to space during dam crest level; it is above maximum deposited beach face, storage bottom and normal water level as well as under maximum flood level.

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土壤含盐量是随质地和滩面水的总盐量的变化而不同，如潮滩沙土由小于0.5%至3.3%。

The salinity of soils varies greatly with texture of soils and total salinity of seawater and ranges from< 0.5% (sandy tidal flat soil)to 3.3%.

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在此基础上探讨了生物活动与滩面 凹坑，沉积物强度非均匀 性以及研究区浮泥之间的关系。

The relationships among biological effects, the formation of depression, strength heterogeneity of sediment and distribution of mud are also discussed.

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