Icon Request: new icons in the field of hydrology water-height

[Etter]

Checklist

• The title of this issue starts with "Icon Request: " and is followed by the new icon name (ex. "Icon Request: Proton Torpedo")
• This icon does not represent a brand
• This request is for a single icon or a matched pair (ex. lock and unlock)
• I've already searched through existing issues, and to the best of my knowledge this request isn't a duplicate
• I understand how new icon requests work

Request type

✨ New icon

Use case

In a hydraulic application context to model the water Depth.

Visual example