Arc Hydro Tools -

October 26, 2023 Prepared For: GIS Analysts, Hydrologists, Water Resource Managers Subject: Technical Overview of Arc Hydro Tools

| Step | Tool/Process | Output | |------|--------------|--------| | 1. DEM Manipulation | Fill Sinks | Depressionless DEM | | 2. Flow Direction | D8 Algorithm | Flow direction grid | | 3. Flow Accumulation | Accumulate Streams | Accumulated flow (cell count/area) | | 4. Stream Definition | Stream Definition (threshold) | Binary stream grid | | 5. Stream Segmentation | Stream Link | Stream segments | | 6. Catchment Delineation | Catchment Grid Delineation | Drainage area for each segment | | 7. Drainage Line Processing | Drainage Line, Adjoint Catchment | Vectorized river network & nested catchments | | 8. Network Construction | Hydro Network, Longest Flow Path | Connected geometric network & basin length | arc hydro tools

Arc Hydro Tools is a powerful extension for ArcGIS that is revolutionizing the way we work with water data. With its comprehensive set of functions for creating, editing, and analyzing hydrographic data, Arc Hydro Tools is an essential tool for water resource managers, hydrologists, and environmental scientists. Whether you're working on water resource planning, flood risk management, or environmental impact assessment, Arc Hydro Tools can help you unlock the power of water data and make more informed decisions. October 26, 2023 Prepared For: GIS Analysts, Hydrologists,

Arc Hydro consists of two main elements: Flow Accumulation | Accumulate Streams | Accumulated flow

Arc Hydro Tools represent the industry standard for hydrological analysis within the Esri ecosystem. By providing a structured workflow for terrain processing, watershed delineation, and network management, it enables water resource professionals to transform raw elevation data into actionable intelligence. Its integration capabilities with industry-standard hydraulic models make it an indispensable tool for flood risk management, water supply planning, and environmental monitoring.