What is a Basin?:

A hydrographic basin is an area physically limited by its topography, where surface waters are drained by a stream or system of streams, of continuous or intermittent flow, which can flow into a main river, a lagoon or directly into the sea.

A basin includes terrestrial ecosystems (jungles, forests, scrublands, grasslands, mangroves, among others), cities and aquatic ecosystems (rivers, lakes, wetlands, etc.), and its limits are established by the mountainous characteristics from where the water that precipitates flows into the territory delimited by it, to an outlet point. [1].

In the hydrographic basin, there are generally three characteristic sectors: High, Medium and Low, which depending on the topographic characteristics of the environment can influence its hydrometeorological processes and the use of its resources. The upper basin includes hillside areas, where the source of the main river is located.

The middle basin is made up of undulating lands and valleys, and the lower basin is where the flow of the river loses strength and solid materials settle out.

River of a basin: The basin has a main river defined as the course with the greatest flow of water (medium or maximum) or the greatest length. Most drainage basins have a well-defined main river from the mouth to near the watershed. It has a variable flow rate and flows into another river in a larger basin or into the sea. Additionally, you may have tributary tributaries feeding the river at a place called a confluence, and outfall tributaries that draw water from the main stream.

Aquifers: in the basin there are also geological formations in which there is water that, due to the characteristics of its rocks, allow water to permeate and accumulate in its pores or cracks. Water flows through the permeable rocks, is stored there and flows outward in springs that later contribute waters to surface.

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