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Fill-Spill-Merge (FSM) is an algorithm thaFill-Spill-Merge (FSM) is an algorithm that distributes runoff on a landscape to fill or partially fill depressions. When a depression fills, excess water can overflow into neighbouring depressions or the ocean. In this clinic, we will use FSM to assess changes in a landscape’s hydrology when depressions in a DEM are partially or fully filled with water. We will discuss why it may be important to consider depressions more closely than just with removal. I will describe the design of the FSM algorithm, and then we will use FSM on a DEM to look at how landscape hydrology changes under different hydrologic conditions. </br></br>This clinic may be helpful to those interested in topics such as landscape hydrology, landscape evolution, flow routing, hydrologic connectivity, and lake water storage.ogic connectivity, and lake water storage.  +
kerryc@uic.edu  +
CSDMS 2024: Coastlines, Critical Zones and Cascading Hazards: Modeling Dynamic Interfaces from Deep Time to Human Time  +
University of Illinois Chicago  +
Illinois  +
Using Fill-Spill-Merge to understand and analyze landscape depressions  +
United States  +
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22:57:26, 1 December 2023  +
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22:34:15, 11 June 2025  +
hydrologic connectivity  +, depressions  +, flow accumulation  +, hydrology  +  and lakes  +
Terrestrial Working Group  +, Cyberinformatics and Numerics Working Group  +, Hydrology Focus Research Group  +, Critical Zone Focus Research Group  +, Ecosystem Dynamics Focus Research Group  +  and River Network Modeling Initiative  +