ArcGIS Tutorial: Understanding Water Systems

The area in which rainwater is received and the network through which rainwater reaches the effluent is called a water system. The flow of water flowing through the river is only a subset of what is commonly referred to as the hydrological cycle, which also includes rainfall, evaporation and groundwater flow. The Hydrological analysis tool focuses on the movement of water over the Earth's surface.

Basin basins are areas where water and other substances are discharged into a public outlet. Other commonly used terms in basin basins are watershed, basin, catchment area or catchment area. This area is usually defined as the total area leading to a given outlet or pour point.

A pour point is the point at which water flows out of an area. This is usually the lowest point along the boundary of the Basin basin.

The boundary between the two basins is called the watershed or watershed boundary.

　　

The network that flows through the water before it reaches the effluent can be displayed as a tree, and the bottom of the tree is a spout. The branches of a tree are rivers. The intersection of two Rivers is called a junction or junction. The reach of two adjacent junctions or channels connecting a junction and outlet is called a river link.

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ArcGIS Tutorial: Understanding Water Systems