We have the next formula
![s=\sqrt[]{9.81d}](https://img.qammunity.org/2023/formulas/mathematics/college/aepiq1x4v8ki8frpj86gl1e1kj7ofmic19.png)
s is the speed in meter per second
d is the depth of the water in meters
If
s= 150m/s
d=?
so we need to isolate the d


we substitute the values

The approximate depth of water where the disturbance took place is equal to 2294 meters