At 21:30 water level is 0.01m and it will keep falling by 0.0m until the low tide at 21:40
The low tide with 0.01m is -3% of the lowest astronomical tide (-0.27m)
At 21:30 water level is 0.01m and it will keep falling by 0.0m until the low tide at 21:40
The low tide with 0.01m is -3% of the lowest astronomical tide (-0.27m)