Skip to main content

CONSIDERATIONS IN EVALUATING AND SELECTING MODELS FOR TMDL DEVELOPMENT–A CASE STUDY OF STEAMBOAT CREEK

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

The development of TMDLs typically involves quantitative water quality and watershed modeling. For agencies/stakeholders faced with the task of developing TMDLs, the selection of an appropriate modeling framework can be a daunting task. This paper presents an approach to selecting appropriate watershed modeling tools, identifies important considerations and potential pitfalls pertaining to model selection, and presents a case study of the proposed approach on the Steamboat Creek watershed, NV. The Steamboat Creek watershed case study was conducted as part of the watershed model selection process for the region. The case study involved a detailed comparison of the Watershed Analysis Risk Management Framework (WARMF) model to an industry standard model for TMDL projects, Hydrologic Simulation Program – Fortran (HSPF), in order to provide confidence in the application of the WARMF model in the region.

The case study was conducted to assess the use of the Watershed Analysis Risk Management Framework (WARMF) model for TMDL studies in the region. This detailed comparison was undertaken to: 1) compare the applicability of WARMF and HSPF for watershed modeling; and 2) compare non-point source loading estimates and water quality calibration results for dissolve oxygen, nitrogen, phosphorous and total dissolved solids. Flows and constituent concentrations were calibrated in both models to match observed values at three locations: Galena Gage, Rhodes Road and Kimlick Lane. The target accuracy was ±10 percent for periods with accurate data and ±20 percent for periods with marginal data quality. The HSPF model simulated hydrology relatively well with deviations, generally over-estimated flows, occurring due to snowmelt or irrigation diversions. WARMF simulated hydrology fairly well and captured the peaks and recessions due to snow melt fairly well, but generally, over-estimated flows during the irrigation months. HSPF water quality calibration results followed the year to year and seasonal trends reasonably well for all constituents but over-estimated TN, TP, TDS and TSS during the winter periods. Calibration results for WARMF followed the year to year and seasonal trends reasonably well for all constituents but under-estimated TN, TP, TDS and TSS during storm events. In addition to water quality, pollutant loads were evaluated on a monthly and yearly basis for TN, TP, TDS and TSS.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 2003-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more