12.2.3. Flashy Rivers In case of flashy rivers, the river stage rises and falls in a very short period of a day or two due to the steep flood hydrograph. A small flow may, however, continue for sometime.
12.2.4. Virgin Rivers In arid regions, waters of some rivers may get completely lost due to evaporation and percolation. Such rivers become completely dry much before they join another river or sea, and are called virgin rivers.
12.2.5. Stable Rivers When the alignment of a river channel, river slope, and river regime are relatively stable and show little variation from year to year except that the river may migrate within its permanent banks (i.e., khadirs) (Fig. 12.1), the river is said to be stable. However, changes in bed and plan-forms of a stable river do take place, but these are small.
