Where Water Meets Earth

Where Water Meets Earth: A Visual Journey of Watershed Delineation

Watershed delineation is the process of identifying and mapping the boundaries of a watershed, which is an area of land where all the surface water drains into a common outlet, such as a river, lake, or ocean. The concept is based on the natural topography of the land, where water flows downhill from higher elevations to lower elevations. 

Watershed delineation steps

Watershed delineation is essential for various environmental management and planning activities, including flood risk assessment, water quality monitoring, erosion control, and land use planning. It allows us to understand the hydrological processes within a specific geographic area and provides valuable information for sustainable water resource management. Various Geographic Information System (GIS) software tools and hydrological models are commonly used for this purpose.

Watershed Delineation using archydro in arcgis pro

ArcHydro is a set of tools and data models designed for water resources analysis and hydrological modeling within the ArcGIS environment. It is an extension that works with ArcGIS Desktop, including ArcMap and ArcGIS Pro. ArcHydro provides a comprehensive suite of tools to support various hydrological tasks, such as watershed delineation, flow direction and accumulation, stream network creation, and more. 

The following video walks you through different steps of watershed delineation: 

Steps to perform point delineation explained in the video: