On the top right hand corner there is a search button. Click on it and type in "splash" or "splash campaign".
There was a group diorama build recently, and it had to include a water feature. All the guys took part described how they made their water. The search will give you a long list of threads where you will find lots of questions and answers and also great tips.
The splash campaign folder in the gallery will give you some ideas on the results achieved. Slodder´s dio had a partially sunk jeep, so this method might suit you.
The gallery can be found
here . Good hunting.