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Catchment Area Singleflow and Multiflow

The Catchment Area (Singleflow) and Catchment Area (Multiflow) datasets, part of the CoRE Stack, together represent upslope runoff contribution areas derived from hydrological modeling. The Singleflow dataset identifies the total upslope area contributing runoff to each point using a single-flow direction algorithm, while the Multiflow dataset models surface runoff dispersion using a multi-directional flow approach for a more realistic representation of natural hydrology. Combined, they support watershed delineation, flow accumulation analysis, and data-driven hydrological and landscape planning.

About Dataset

The Catchment Area (Singleflow) and Catchment Area (Multiflow) datasets are hydrological layers within the CoRE Stack (Commoning for Resilience and Equality), representing surface runoff accumulation and flow behavior across terrain. The Singleflow (D8) dataset models runoff moving in a single downslope direction, delineating catchment boundaries, flow paths, and hydrological connectivity essential for watershed delineation, erosion assessment, and resource planning. The Multiflow dataset simulates runoff dispersing across multiple downslope directions, offering a more realistic representation of surface water movement, infiltration zones, and connectivity for fine-scale hydrological and ecosystem management. Together, these datasets complement other CoRE Stack drainage layers to support data-driven landscape planning, water resource management, and ecological restoration.

Technical details and methodologies are available in the CoRE Stack Technical Manual: https://core-stack.org/core-stack-technical-manual-v2/

Purpose of Dataset

The Purpose Of The Catchment Area (Singleflow) And Catchment Area (Multiflow) Datasets Together Help Analyze Surface Runoff And Watershed Dynamics Within The Core Stack. Singleflow Identifies Upslope Areas Contributing Water To Each Point, While Multiflow Models More Realistic Runoff Dispersion Across Multiple Directions. Combined With Other Hydrological Layers, They Support Data-driven Watershed Planning, Erosion Assessment, And Sustainable Water And Landscape Management.