How to fix leaking basement window in foundation
All basement windows will leak given that you have standing water in the area.  This issue is about the drainage of water on this section of your house and not about the shape of the concrete.  

Probably the easiest thing to do is to dig out around this area, add some rock and a drain pipe going out.  I can't see in the picture a "well" or cover either.

If this is not "standing water" for sure and you are getting direct rain, then silicone caulk will be far more effective than more concrete.