Thanks for the feedback everybody. I was unsure about the processing on this one, as I had a hard time getting the look I was after, and your comments have confirmed what I thought might be the case. The greens are really intense there on a rainy day, and I wanted that to come through in the image but without looking artificial. I did desaturate the greens a bit after my tonal adjustments but it might not have been enough (or maybe the tonal adjustments were too much).
About the too much contrast, is it the contrast between the water and the rest of the scene, or the local contrast of individual elements in the scene? This image is not actually an HDR; I did overlay a second exposure for the water, but the rest of the scene is from a single exposure. I did make tonal adjustments in post-processing, though.