Watersheds Under Development

The hydrologic change in watersheds at the national scale is illustrated in terms of percentage of watersheds in developed (or urbanized) land cover across the nation. In 1982, 5.4 percent of watersheds (at the 8-digit HUC) had 15 percent or more of their area developed to urban land cover. By 1997 that percentage had nearly doubled: 9.5 percent of the watersheds in the United States had 15 percent or more of their area developed to urban land cover.

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