The solid surface basin acts as a funnel by collecting all the water within the area covered by the basin?

A solid surface basin or catchment basin is an extent or an area of land where all surface water from rain, melting snow, or ice converges to a single point at a lower elevation, usually the exit of the basin, where the waters join another body of water, such as a river, lake, reservoir, estuary, wetland, sea, or ocean. Thus if a tributary stream joins a brook that in turn joins a small river which is a tributary of a larger river, there is a series of successively larger (and lower elevation) solid surface basin.

Other terms used to describe solid surface basin are catchment, catchment area, drainage area, river basin and water basin. In North America, the term watershed is commonly used to mean a drainage basin, though in other English-speaking countries, it is used only in its original sense, to mean a drainage divide, the former meaning an area, the latter the high elevation perimeter of that area. solid surface basin drain into other solid surface basin in a hierarchical pattern, with smaller sub-drainage basins combining into larger drainage basins.

In closed ("endorheic") solid surface basin the water converges to a single point inside the basin, known as a sink, which may be a permanent lake, a dry lake, or a point where surface water is lost underground.The solid surface basin includes all the streams and rivers that convey the water towards the sink, as well as the land surfaces from which water drains into those channels.

The solid surface basin acts as a funnel by collecting all the water within the area covered by the basin and channelling it to a single point. Each solid surface basin is separated topographically from solid surface basin by a perimeter, the drainage divide, making up a succession of higher geographical features (such as a ridge, hill or mountains) forming a barrier.

solid surface basin are similar but not identical to hydrologic units, which are solid surface areas delineated so as to nest into a multi-level hierarchical drainage system. Hydrologic units are defined to allow multiple inlets, outlets, or sinks. In a strict sense, all drainage basins are hydrologic units but not all hydrologic units are solid surface basin.

solid surface basin