At 18:40 water level is -0.03m and it will keep falling by 0.01m until the low tide at 20:10
The low tide with -0.04m is 40% of the lowest astronomical tide (-0.1m)
At 18:40 water level is -0.03m and it will keep falling by 0.01m until the low tide at 20:10
The low tide with -0.04m is 40% of the lowest astronomical tide (-0.1m)