This plugin uses shortcodes you can get the USGS river flow data for a site location. It also includes a easy to use Site Code Search.
Enter the USGS Station ID and this plugin provides you with river name, currently water level, graph and station url via a widget or shortcode.
Display USGS topographical maps on your site with a simple shortcode that is placed in a page or a post.
This plugin fetches streamflow and river data from the USGS.