Hydrostatic Leveling

Despite the fashion-themed filename, this image illustrates a classic surveying technique using the principle of communicating vessels.
​The Principle: Water in a connected tube will always reach the same height (elevation) at both ends due to gravity, regardless of the terrain between them. This creates a Uniform Hydrostatic Water Level (Datum).
​The Process: * Surveyors use a flexible tube filled with liquid (often dyed distilled water for visibility).
​By comparing the water level in the tube against a Precision Scale on a telescopic staff, they can calculate the exact height difference between two points (e.g., between a lower point at 100 ft and an upper point at 200 ft).
​Why use it? It’s incredibly accurate for leveling over obstacles or around corners where a laser or optical level might have its line-of-sight blocked.

Видео Hydrostatic Leveling канала Max Engineer