- Aquifer Storage, Recovery and Treatment
The Wichita Aquifer Storage and Recovery project involved the design and construction through design-build delivery. Facilities built include a river intake, presedimentation basin, settled water pump station and a 30 million gallon per day (MGD) surface water treatment plant with submerged membrane filtration, ozone/hydrogen peroxide advanced oxidation, ground storage, high service pumping and residuals handling.
Extensive value engineering of the 30 percent design documents prepared by others at the inception of the design-build process reduced the total project cost from $105 million to $73 million while also incorporating facilities to readily expand the plant to 60 MGD.
Burns & McDonnell completed the design of the 66 MGD surface water intake structure on the Little Arkansas River with 33 MGD pumping capacity installed in the current phase. Extensive hydraulic modeling and stream flow data analysis were performed to determine water levels at the intake structure for a wide range of operating scenarios. Computational fluid dynamic and physical modeling of the river and the intake structure were performed for flows ranging from 100 to 10,000 cubic feet per second (cfs).
The physical model consisted of a 1:5 scale model of the river, intake structure and pumps. The objectives of the modeling were to evaluate sediment movement and potential sedimentation, stability of the river banks before and after structure construction, and optimization of pump intake hydraulics. After modeling was complete, Burns & McDonnell handled the civil, structural, mechanical and electrical design associated with the intake structure, pumping systems, screens, backwash systems and all site work.
Designed to treat stormwater runoff for aquifer injection, the water treatment plant uses a combination of sedimentation, strainers and membrane filtration to clarify the water from a turbidity of 1,000 NTU to less than 0.1 NTU without chemical addition. The avoidance of chemicals allows the return of all suspended solids to the river. The proprietary advanced oxidation process provides for atrazine destruction and virus inactivation without formation of bromate. The facilities are designed for remote operation and are readily expandable to 60 MGD.
- Program management
- Hydrogeological engineering
- Water quality monitoring
- Design criteria development
- Water accounting system
- Public information program
- Permitting agency reviews
- Monthly/quarterly project reporting
- Technical publications
- Environmental clearance