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Rio Blanco Watershed

Rio Blanco Watershed. The Rest of the Story. Physical Characteristics . Located Northwest of Guadalajara, Mexico. Physical Characteristics . Main river is about 14 miles long Watershed area of roughly 65 mi 2 Approximately 100,000 residents within watershed boundary

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Rio Blanco Watershed

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  1. Rio Blanco Watershed The Rest of the Story

  2. Physical Characteristics • Located Northwest of Guadalajara, Mexico

  3. Physical Characteristics • Main river is about 14 miles long • Watershed area of roughly 65 mi2 • Approximately 100,000 residents within watershed boundary • Water was used as a culinary source before it became so polluted • Water is currently used for agriculture

  4. Watershed Problems • Pesticides and fertilizers from agriculture • Residential wastewater is not treated prior to discharge • Waste from cattle, pork, and poultry farms • Small, local factories • Dead animals • Garbage

  5. Suds from detergents in Rio Blanco Little Hispanic Girl for Scale

  6. Residential Discharge

  7. Why Nothing has Been Done • Money • Social apathy • Lack of funds • Lack of government support • No cash

  8. Project Goals • Water quality analysis of the watershed • Suggest possible solutions • Create WMS/GIS model of watershed

  9. Project Snags • Watershed delineation • Communication • Lack of a clear definition of objectives from the beginning • Lack of data • Different classification systems

  10. Initial Delineation from Supplied DEM’s

  11. Initial delineation compared to Mexico’s given delineation Initial Delineation Mexico’s Delineation

  12. Closer look at differences

  13. Examining the differences Initial Delineation Mexico’s Delineation

  14. Water Quality Analysis Using QUAL2Kw

  15. QUAL2K and QUAL2Kw • QUAL2K is a computer model developed by Greg Pelletier and Steve Chapra • It is used to simulate water quality in streams and rivers • QUAL2K was preceded by QUAL2E, which was originally developed in 1987 • QUAL2K expands on the capabilities of QUAL2E by adding: • Functionality to segment river systems into river reaches • Input of carbonaceous BOD (CBOD) as slowly or rapidly oxidizing forms • Specify algae growth, PH, pathogen quantities • A user interface integrated into Microsoft Excel • QUAL2Kw is related to QUAL2K and simply adds greatly functionality • QUAL2Kw is available from the Washington State Department of Ecology

  16. QUAL2Kw Uses • Simulate the variation of water quality parameters • Along the length of stream • Over the course of a day • Can create a water quality model for a river, which can then be verified through validation and sensitivity analyses • If the model gives good results in the validation and sensitivity analyses, it then can be used for forecasting

  17. QUAL2Kw Parameters The most sensitive parameters are: • Head water Info • Lat/long and elevation (location info) • Temperature • Dissolved Oxygen • BOD • Nitrogen • Phosphorus • Alkalinity • pH • Reach Info • Lat/Long and Elevation • Hydraulic Model (Weir Overrides Rating Curves; Rating Curves Override Manning Formula) • Algal Info

  18. QUAL2Kw Parameters (contd..) • Air Temperature (Better if hourly) • Dew point temperature (Better if hourly) • Wind speed and day light info • Source info • Inflow rate and quality (point or distributed) • Outflow rate and quality (point or distributed) • Rates for various chemical reactions

  19. Input Parameters • Lat/Long, elevation • Suspended solid, Nitrogen • pH • BOD We assumed We had • Manning’s n • Wind speed • Cloud cover and hours of sunshine • Amount and quality of inflow sources • All the reaction rates • Channel cross section • Temperature (Air and Dew Point) • Inorganic Solids • Dissolved Oxygen • Phosphorus • Phytoplankton • Alkalinity

  20. Graphs

  21. Graphs

  22. Graphs

  23. Graphs

  24. Graphs

  25. Graphs

  26. Graphs

  27. In Order to Improve Our Model • The following data is needed: • Sufficient channel geometry data • Water quality info • Reaction rates • Climatological data • Inflow/Outflow locations, rates and quality info

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