This document presents elevation hydrology tools that simplify watershed delineation and analysis. The tools allow for clipping data to an area of interest to reduce size, and streamlining processes like flow direction, accumulation, and stream network derivation. They also enable watershed delineation and attribute calculation, including area, average slope, and runoff curve number. The document provides an overview of Python scripting solutions used and defines the runoff curve number as an empirical parameter for predicting runoff or infiltration from rainfall excess that is widely used to determine approximate direct runoff from rainfall events based on land cover and soil group.