11.   The ice streams flow along relatively narrow basins made slippery by a combination of fine sedimentary particles and melted ice water.

12.   The key to keeping this complex world alive, said Richter, is maintaining the stream flow at the driest times of the year, from April through June.

13.   The palms thickly overhang the canyon bottom, where a stream flows and green grasses form a rich carpet.

14.   Western and southern Kansas have had enough rains to keep stream flow normal.