This document discusses basin morphometry, which involves quantitatively measuring the shape and geometry of drainage basins. It describes various linear, aerial, and relief properties that are measured, such as stream order, length, and number, drainage density, basin area and relief. These morphometric properties provide insights into surface processes, basin evolution, and characteristics like flood risk and sediment yield. They can also indicate tectonic activity and help improve models for predicting stream discharge and other hydrological factors.