Department of Water Resources Home

Michal Koller
Environmental Planning and Information Branch
Dayflow Program
3500 Industrial Blvd.
West Sacramento, CA 95691
(916) 376-9728

Mailing Address:
P.O. Box 942836
Sacramento, CA 94236-0001
Input Data for Calculating Current Water Year NDOI

If you want to obtain net Delta Outflow Index (NDOI) for the current water year, here are two ways to do it:

  1. DWR Operations Control Office (OCO):
  2. This site provides an estimate of NDOI for the most recent month. Contact Bryant Giorgi for data older than one month.

  3. California Data Exchange Center (CDEC):
  4. To calculate your own estimate of NDOI, use CDEC to fill in variables in the following equation:*

    *for inflow data use previous day value.

    Note: This NDOI estimate will differ from the Dayflow estimate and should be consider preliminary.