FAQ/ Difference between water level and depth¶
Are "water level" and "depth" used interchangeably?
response¶
Yes, "water level" and "depth" are used interchangeably.
- Water level: The height of the water surface as measured from the reference plane
- Water depth: The height of the water surface as measured from the bottom of the water
Figure: Definition of water level and depth in DioVISTA
DioVISTA uses the water level as the height of the water level measured from the Tokyo Bay mean sea level (T.P.). "Tokyo Bay mean sea level (T.P.)" is the reference plane of the elevation of the Japan.
The elevation of the water level reference plane is called "zero height". The zero height of DioVISTA is 0 m. When comparing the results of DioVISTA calculations with the observed values at the water level observatory, use the "zero height" of both to match the reference planes.
DioVISTA defines the river depth as the height of the water level measured from the lowest riverbed in the river cross-section.