Quantifying Wetland Hydrological Functions

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Quantifying Wetland Hydrological Functions
Dissertation Title
Joseph K. Amoah

• PhD Candidate
• Civil Environmental Engineering Dept.
• Florida AM University

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Objectives

• Perform terrain analysis on a digital elevation
  model (DEM) dataset to produce hydrological
  response units (HRUs)
• Develop an Interface Data Model to support
  spatial hydrological modeling with DRAINMOD
• Investigate the effect of topographical relief on
  streamflow
• Perform quantitative assessment of hydrological
  measures
• Conduct comparative analysis of hydrological
  functions from the HRUs

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Hydrological Functions

• Floodwater storage
• Watertable dynamics
• Flood Attenuation

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Data Requirements

• Watershed
• Water-table level
• Groundwater level
• Streamflow
• Hydraulic conductivity

• Rainfall
• Wetland type
• Soil type
• Meteorological data
• Vegetation

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Hypothetical Watershed
Figure 1. Conceptual Watershed Delineation
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Turkey Creek Watershed
Source US Geological Survey
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DEM with Streams
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Contour Flow Accumulation
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Subwatershed Delineation
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Expected Outcome

• Presence and magnitude of wetlands in a watershed
  will influence flood storage values
• Watersheds with wetlands will experience low peak
  flow rates
• Predict wetland hydrology based on water-table
  dynamics
• Consequent impact of above outcomes in creating
  or ameliorating water-related hazards

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• Support establishment of BMP
• Generation of generic quantitative statements on
  wetland hydrological functions