BackStory with the American History Guys, produced by the Virginia Foundation for the Humanities and available online at http://backstoryradio.org/, seeks to bring historical perspective to current events. Broadcast episodes run about an hour and are available online as podcasts.
Some recent water-related episodes include the following:
Tapped Out: Thirsting for Fresh Water, 52 minutes, 3/27/15 (re-broadcast), exploring the history of water rights and access in the United States; it includes a segment on water use and contamination by the English colonists at Jamestown; online at http://backstoryradio.org/shows/tapped-out/?autoplay=true.
Island Hopping, 59 minutes, 3/20/15, on the role of islands in American History, online at http://backstoryradio.org/shows/islands/.
That Lawless Stream: A History of the Mississippi River, 52 minutes, 6/14/13, online at http://backstoryradio.org/shows/that-lawless-stream/.