Middle reaches canal head foundation is the non-cohesive soil, extremely loose silt sand.

中游渠首地基是粘粒极少、极松散的粉细沙层。

youdao

It need not be thought of silting when medium and small sized water convey canal were designed because of little water drawing and sand quantity.

阐述了中小型输水渠道设计时，由于水库取水含沙量较小，不需要考虑淤积问题。

youdao

Fresh from constructing a sea-level canal through the flat Egyptian sand, de Lesseps was determined, without having set foot in Panama and after only the vaguest of topographical studies, that his project through the mountainous central American isthmus would also be a sea-level canal, requiring no locks to cope with changes in altitude.

ECONOMIST: The Panama Canal

It had been built illegally on what used to be a canal, before a developer had filled it in with sand.

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