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  AQWC Restoration - Feasibility Study   


​Client: USBR (sub-consultant to AES)
Year: 2016-2017
​

About: 
The objective of this study was to evaluate the suitability and cost-effectiveness of maintaining the Aha Quin West Channel (AQWC) as an open water backwater channel with associated wetlands. Hydrology and sedimentation issues have demonstrated over time that the AQWC site is not self-sustaining and requires frequent and costly maintenance to continue to provide the originally intended function. 
​Specifics:
Four different models were used in this study.
​
​The proposed scenarios for the AQWC included the dredging to reach two different bottom profiles, a retention basin to reduce sediment load from the Manson Wash ephemeral flows, and a sedimentation basin at the upstream end. An off-site mitigation channel was also proposed. Extend of open water and wetland areas were determined for all cases. A cost analysis at conceptual design level was also conducted.
  • SWMM model developed for the Manson Wash basin to obtain design storm outflows.
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  • Existing HEC-RAS model of the Colorado River adjusted to obtain seasonal water level percentiles at project sites.​
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Applied Skills:
  • H&H Modeling: Data Processing, Conceptualization & Setup
  • Design Storm simulations
  • ​Scenario Evaluations
​
Consulting Areas:
  • Surface Water Management

Software Applied:
  • HEC-RAS
  • EPA-SWMM5
  • SWMM5 to SHP
  • AutoCAD
  • ArcMap
  • HEC-RAS model built to obtain water levels profiles at the AQWC under existing conditions and two proposed scenarios: original design criteria and sustainable design restoration. 
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  • HEC-RAS model to obtain water levels profiles at the offsite mitigation channels.
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​Outcome:
The suitability and cost-effectiveness evaluation of the different scenarios lead to some recommendations that are helping the stake holders in their decisions. 
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Modeling Services
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- Data mining & Processing
- Conceptualization & Setup
- Sensitivity Tests
- Model Calibration
- Model Telescoping
- Design Storm Simulations
- Scenario Evaluations
​- Post-Processing of results
- Peer review
- Model QA/QC
- Mass balance checks
- Fixing numerical instabilities
- Calibration/validation checks
​- Reservoir Storage Modeling
- GIS data mgmt. and tools

Consulting Areas
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- Natural resources planning
- Stormwater management
- Groundwater management
- Surface water structure design
- Water supply planning
- Species and sediment transport
- Salt water intrusion
- Floodplain delineation & management
- Floodway Encroachment Analysis
​- Urban and coastal flooding
- Water quality studies
- Wetland conservation and restoration
- Wellhead protection area delineation
- Landscape ecology
- Water regulations permitting

Featured Software
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MIKE 11
MIKE SHE
MIKE21
ECOLab
MODFLOW
GWV (Vistas)
MODHMS
​GIS-ArcMap

HEC-RAS
​HEC-HMS
EPA-SWMM
​XP-SWMM
ICPR
​RiverFlow2D
WASP
HSPF

Software Development
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Spreadsheet modeling
File format converters
Pre- & post-processing tools
A la carte software (C#, Python, etc)


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