Hydrologic budget for a wetland system.

Details

• Creators:
  Yu, S. L. ; Fassman, E. A.
• Corporate Creators:
  Virginia. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Wetlands
  • Hydrologic cycle
  • Aquatic habitats
  • Aquatic plants
  • Empirical equations
  • Evaporation
  • Evapotranspirtation
  • Hydrologic budget
  • Hydrologic systems
  • Penman method
  More +
• Publication/ Report Number:
  VTRC-99-R9
• Resource Type:
  Research Paper
• Geographical Coverage:
  Virginia
• Edition:
  Final Report, August 1996-June 1998
• Corporate Publisher:
  Virginia Transportation Research Council (VTRC)
• Abstract:
  An important functional indicator of the success of a constructed wetland as a replacement for a natural system is the hydrology of ; a site and whether it is adequate to support wetland vegetation and habitats. For constructed wetlands with potentially limiting ; hydrologic conditions, such as sites that rely on stormwater runoff as the primary source of water, particular attention to water loss ; through evapotranspiration (ET) is necessary in determining the water balance. The literature reveals a variety of techniques used to ; calculate ET and demonstrates the difficulty in estimating ET. Of the methods presented in this report, three empirical relationships ; were applied to the water balance of a stormwater-supported mitigated wetland. The results were compared to those given by direct ; measurement. ; Empirical estimation of wetland ETrevealed that the Penman method most closely reflected actual wetland ET, the Thornthwaite ; method predicted water loss at a rate significantly less than the actual rate, and restrictions of the Class A pan evaporation method ; rendered the method inappropriate for the given conditions. The accuracy of any empirical estimator to reflect ET rates may improve ; from on-site data collection of climate parameters.
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• Format:
  PDF
• Funding:
  SPR 5759-030-940
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/15601/dot_15601_DS1.pdf
• File Type:
  [PDF - 1.34 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ec9f5a9daa3b7f99d3df51c9f0e626c31e17db22341432e8845baef1ad2e179e