Distributed Hydrologic Models for Flow Forecasts – Part 1 provides a basic description of distributed hydrologic models and how they work. This module is the first in a two-part series focused on the science of distributed models and their applicability in different situations. Presented by Dr. Dennis Johnson, the module begins with a review of hydrologic models, and then examines the differences between lumped and distributed models. It explains how lumped models may be distributed by subdividing the basin and suggests when distributed hydrologic models are most appropriate. Other topics covered include the advantages of physically-based versus conceptual approaches and some strengths and challenges associated with distributed modeling.
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Describe distributed hydrologic models (DHMs) and how they work
- Describe how lumped models may be distributed by subdividing the basin. (i.e. grids, sub-basins, and flow planes)
- Explain when DHMs are most appropriate
- Explain differences between lumped and distributed models:
- DHMs tend to rely on physically-based approaches
- Lumped models rely on conceptual approaches
- Describe some of the challenges associated with DHMs
Hydrology, hydrologic modeling, hydrologic models, distributed hydrologic models, DHM, DHMs, hydrometeorological forecasting, hydrometeorology, lumped model, SAC-SMA, unit hydrograph, fate of precipitation, excess precipitation, runoff, watershed, surface flow, subsurface flow, gridded basins, streamflow, NRCS Runoff Curve Number, storm direction, storm coverage, mean areal precipitation, MAP, basin, sub-basin, subbasin, kinematic wave, overland flow, flow plane, roughness coefficient, basin area, Juniata river watershed, runoff hydrograph, flash flood, hydrograph, evapotranspiration, ET, soil moisture, DEM, digital elevation model
June 2020 - The lesson was updated to current internet standards (mp4/html5), with no changes to content.
