What is watershed delination?

Watershed delineation is a process through which we identify and map the boundaries of a watershed. A watershed is an area of land that drains all the water (rainfall, snowmelt, etc.) into a common point, such as a stream, lake, or ocean.

To delineate a watershed, we use digital elevation models (DEMs) and hydrologic modeling software that factor in the terrain, slope, and topography of the land. We also consider other factors such as land use and soil characteristics.

Once we have delineated the boundaries of the watershed, we can calculate various characteristics such as the area, perimeter, and shape of the watershed, which can help in managing the natural resources such as water, forest, grasslands and other wetlands. With the help of this information, we can manage and protect the watershed resources, assess the impacts of land use changes, and plan for future land use activities that affect the watershed.