Sunday, March 14, 2010

Waters of March...

A quick look at the stream gages in the aftermath of a wicked nor'easter shows that several streams reached flood stage. Notable among these are the Flatbrook, Paulinskill, Pequest and Assunpink on the NJ side, and the Neshaminy and Brandywine on the PA side.

All the other usual suspects were ripping high but did not and will not flood this time (Musconetcong, Tohickon, Wickecheoke, etc.).

The Delaware River at Riegelsville is currently 15.18' or 7' below flood stage. It should crest tonight or tomorrow at around 18' (my unscientific estimate). The river is already nearing its crest point according to the Upper Delaware gages.

The Delaware River at Belvidere is only at 12.33' and it should be noted that - all things being equal - the gage usually reads about the same at both the Belvidere and R-ville locations and both have a 22' flood threshold. Why the three foot difference? Most likely the Lehigh River, which joins the Delaware below Belvidere, and influences the river below the confluence at Easton.

The Lehigh is already showing a drop at Lehighton, and it's just beginning to flatline at the Bethlehem gage. That's what we need to see before the Delaware River begins to level off.

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