The Chhattisgarh region is characterized by non-perennial streams, which actually are rain-fed rivers. They carry water only during and immediately after rain. During the dry season either they may cease to flow entirely, or there is hardly any water in most of the drainage channels. Clearly, watersheds with a higher proportion of area drained by non-perennial streams will tend to have lower soil moisture retention and water harvesting capability than those areas where perennial streams pre-dominate. Ceteris paribus, areas with proportionately more perennial streams should be fewer droughts vulnerable. 44 Stream Patterns Catchment areas can be described by their stream channel patterns, as viewed from maps or from the air. Each stream has its characteristic channel, based on the topographical obstacles encountered, as it seeks the `path of least resistance' in its journey towards the sea. Stream patterns may develop randomly on uniform soils, or in response to weaknesses in the underlying geology (McKnight, 1990; 1985).

Bhargava K. Iyengar et al., International Journal of Computer Engineering In Research Trends Volume 3, Issue 06, June-2016, pp. 327-331