Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

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Presentation transcript:

Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology

Topics of Discussion Background What are we modeling? How are we doing it? What are the outputs? Conclusions

Background Why does Austin care? A Brief History Christine’s Model Phase II

What are we modeling? Flows Loads Best Management Practices removals

How are we doing it? Flows Loads BMP removals

Impervious CoverRelated to land use Flows - Inputs Flow DirectionBased on CRWR Pre-Pro of 30 m DEMs Correction GridNot used Recharge FlowFrom Recharge script which requires: Cell Recharge Recharge zone grid, Creek grid, Flow accumulation, Flow direction, Watershed, and Upstream points.

Flows - Equations Rv = IC IC Rv bf = IC In recharge zone, Flow = Raw Flow - Recharge

Flows - Outputs Corrected direct runoff generated in each cell Corrected base flow generated in each cell Total flow without considering recharge Total predicted flow Direct runoff Base flow

Loads - Inputs Direct runoff EMC table Base flow EMC table Impervious cover coverage or grid Flow direction grid Water land use zones grid Direct runoff Base flow generated Total flow without considering recharge Cell recharge

Loads - Equations Equations EMC = a+bIC EMC bf = C if IC< undeveloped (15%) D if IC> undeveloed

Loads - Outputs Load grids for constituents for which the load is computed. TSS TSS BOD COD TOC DP TP NH3 TKN NO TN Cu Pb Zn

Best Management Practices Located BMPs defined by mass removed Located BMPs defined by efficiency Non-located BMPs defined by efficiency Inputs Flow direction grid Flow accumulation grid BMPs point coverage - The attribute table must contain a load removed field. Initial load grid - the result of the load computation. Output Removed Load grid

Conclusions Nice Tool Needs to include: Future land use Channel Erosion

Questions?