They Shall Have Stars (1956) (also published under the title Year 2018!), incorporating the stories 'Bridge' and 'At Death's End', is set in the then near future (the book begins in 2013). Over the years James Blish made many changes to these stories in response to points raised in letters from readers. Since 1970, the primary edition has been the omnibus volume first published in paperback by Avon Books. One story, 'Earthman, Come Home', won a Retro Hugo Award in 2004 for Best Novelette. The stories cover roughly two thousand years, from the very near future to the end of the universe. The series features entire cities that are able to fly through space using an anti-gravity device, the spindizzy. The excess water volume can quickly overwhelm streams and rivers, causing them to overflow and possibly result in floods.The novella 'Sargasso of Lost Cities', Blish's third 'Cities in Flight' story, was originally published in Two Complete Science-Adventure Books in 1953.Ĭities in Flight is a four-volume series of science fiction novels and short stories by American writer James Blish, originally published between 19, which were first known collectively as the ' Okie' novels. These surfaces act as 'fast lanes' that transport the water directly into storm drains. During periods of heavy rain and snowfall, water may run onto and off of impervious surfaces such as parking lots, roads, buildings, and other structures because it has nowhere else to go. Rain and snowmelt from watersheds travel via many routes to the sea. Instead, it quickly runs off to lower ground.

In other areas, where the soil contains a lot of hard clay, very little water may infiltrate. Some water infiltrates much deeper, into underground reservoirs called aquifers. This groundwater remains in the soil, where it will eventually seep into the nearest stream. When rain falls on dry ground, it can soak into, or infiltrate, the ground. Not all water flows directly to the sea, however. As the water flows, it often picks up pollutants, which may have sinister effects on the ecology of the watershed and, ultimately, on the reservoir, bay, or ocean where it ends up. Water from hundreds, and often thousands, of creeks and streams flow from higher ground to rivers that eventually wind up in a larger waterbody.

states and two Canadian provinces stretching from the Rockies to the Appalachians! The largest watershed in the United States is the Mississippi River Watershed, which drains 1.15 million square miles (2,981,076 square kilometers) from all or parts of 31 U.S. Water from as far away as upstate New York eventually finds its way to the Chesapeake-the nation’s largest estuary.Ĭonversely, some watersheds encompass thousands of square miles and may contain streams, rivers, lakes, reservoirs, and underlying groundwater that are hundreds of miles inland. The Chesapeake Bay watershed is home to 18 million people and covers 64,000 square miles (165,759 square kilometers).

Watershed by James Blish