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

Jan 18, 2018

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Norah Jefferson

Background Why does Austin care? A Brief History Christine’s Model Phase II
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Page 1: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

Water Quality Master PlanningWater Quality Master Planning

A Barton Creek Model

Katherine G. OsborneCE 394K.2 Surface Water Hydrology

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

Topics of DiscussionTopics of Discussion• Background

• What are we modeling?

• How are we doing it?

• What are the outputs?

• Conclusions

Page 3: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

BackgroundBackgroundWhy does Austin care?A Brief History

• Christine’s Model• Phase II

Page 4: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

What are we modeling?What are we modeling?Flows

Loads

Best Management Practices removals

Page 5: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

How are we doing it?How are we doing it?

• Flows• Loads• BMP removals

Page 6: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

Impervious Cover Related to land use

Flows - InputsFlows - Inputs

Flow Direction Based on CRWR Pre-Pro of 30 m DEMs

Correction Grid Not usedRecharge Flow From Recharge script which

requires:Cell Recharge Recharge zone grid,

Creek grid, Flow accumulation, Flow direction, Watershed, and Upstream points.

Page 7: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

Flows - EquationsFlows - EquationsRv = 0.3428IC 2+ 0.5677IC + 0.0125

Rv bf = - 0.36IC + 0.1904

In recharge zone, Flow = Raw Flow - Recharge

Page 8: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

Flows - OutputsFlows - OutputsCorrected direct runoff generated in each cellCorrected base flow generated in each cell

Total flow without considering recharge

Total predicted flow

Direct runoff

Base flow

Page 9: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

Loads - InputsLoads - InputsDirect runoff EMC tableBase flow EMC table

Impervious cover coverage or gridFlow direction gridWater land use zones gridDirect runoff Base flow generated Total flow without considering recharge Cell recharge

Page 10: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

Loads - EquationsLoads - Equations• Equations

EMC = a+bICEMC bf = C if IC< undeveloped (15%)

D if IC> undeveloed

Page 11: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

Loads - OutputsLoads - OutputsLoad grids for constituents for which the

load is computed. TSSTSS BOD COD TOC DP TP NH3 TKN NO TN Cu Pb Zn

Page 12: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

Best Management Practices 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 gridBMPs point coverage - The attribute table must contain a load removed field. Initial load grid - the result of the load computation.

OutputRemoved Load grid

Page 13: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

ConclusionsConclusionsNice Tool

Needs to include: Future land useChannel Erosion

Page 14: Water Quality Master Planning A Barton Creek Model Katherine G. Osborne CE 394K.2 Surface Water Hydrology.

Questions?Questions?