1- Import file

2-Explode the file

3- Erase the mesh

4-Trace the curve

5- Draw Axis

6- Revolve to make solid

7- Trace the base

8- Extrude the curve

9- Place the parts on each other

10- Use the sphere

11- Polar array

12- Select ghosted view

13- Add grooves

14- Polar array

15- Boolean split

16- Fillet

17- Boolean Difference

18- Fillet edge

19- Bend and rotate

20- Boolean difference

21- Extrude curve tapered

22- Patch

23- Extrude curve tapered, fillet surface

24- Sweep 1

25- Final model

Images used the 123D Catch of the Water fountain