nice blending of the the water -- find the straight line on the left in the arch a bit distracting (know it is in the original image) but because of the colour of this image seem to stand out a bit too much. Also there are whiteish strips on the inside of the arches which again are distracting in the high res

Very nice effect, good effort!

ok thx for the comments, removed the white line alan

if the outside is brighter due to the moon, the inside water should be darker, this will create more contrast and mood.

add a little white-wash (waves) to the side of the arch (where water flows in)

very nice work and good thinking good luck author
like it