1 / 12

The Salty Truth: Reducing Salt for Sustainable Water Supply in MWD Service Area

The Salty Truth emphasizes the urgent need for a long-term strategy to reduce salt levels in the local water supply, vital to over half the MWD’s service area. Currently, nearly 1,300,000 tons of salt are imported annually, primarily from the Colorado River. This presents a significant challenge for maintaining water quality. The Santa Ana Watershed faces a salt imbalance, demonstrating the need for balanced imports and discharges. Strategies to mitigate this issue include reducing salt content in various water sources and managing urban contributions effectively.

ethel
Télécharger la présentation

The Salty Truth: Reducing Salt for Sustainable Water Supply in MWD Service Area

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. “The Salty Truth” ACWA 8, 9, & 10 September 30, 2010 Peer A. Swan

  2. “The Salty Truth” Need long term focus on reducing SALT to protect local water supply, which makes up over half the water supply in the MWD service area Currently importing nearly 1,300,000 tons of salt per year into the MWD service area with the largest amount coming from the Colorado River.

  3. “The Salty Truth” • 1,200,000 SWP at 250 ppm = 272,000 t/yr • 1,150,000 CRA at 650 ppm = 1,017,000 t/yr ---------------- • Total 1,289,000 t/yr ========

  4. “The Salty Truth” Santa Ana Watershed • Imports about 700,000 AF/YR • Average TDS of about 610 ppm • 580,720 tons of salt per year

  5. “The Salty Truth” Santa Ana Watershed • Orange County Sanitation 140 MGD discharge • 156,800 AF / yr at 1100 ppm salt • 235,000 T/yr to ocean

  6. “The Salty Truth” Santa Ana Watershed Imported water salt = 580,720 T/yr Less ocean discharge 235,000 T/yr ----------- Net imported salt 345,720 T/yr ======

  7. “The Salty Truth” Santa Ana Watershed • Estimated salt imbalance 524,000 T/yr • Imports less ocean discharge 345,720 T/yr ----------- Other Salt contribution 178,280 T/yr ======

  8. “The Salty Truth” Santa Ana Watershed - How to achieve balance • Estimated salt imbalance 524,000 T/yr • Lower salt in CRA to 200 ppm <217,600>T/yr • Lower recycled water to 200 ppm <65,280> T/yr • Lower SWP to 150 ppm <40,800> T/yr • Reduce urban contribution 50 ppm <47,600> T/yr • Reduce import 100,000 AF 200 ppm <27,200> T/yr ----------- Remaining imbalance 125,520 T/yr =======

  9. Questions or Comments?

  10. Questions or Comments?

  11. Questions or Comments?

  12. Questions or Comments?

More Related