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NID’s Plan for Water Continues with an overview of Hydrologic Modeling System (HEC-HMS) development.

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NID’s Plan for Water process continues on Tuesday, April 11. This meeting will take a deeper dive into Hydrology and Hydrography, with a presentation on Hydrologic Modeling System (HEC-HMS)development. The workshop will start at 4:00 p.m at NID’s main office and also via Zoom. 

Overview of current Plan for Water stages:


This stage will seek to determine design assumptions, principles, and standards of data-driven modeling as it relates to the hydrology and hydrography of NID’s water systems while reconfirming previous efforts of FERC re-licensing models and determining appropriate climate and drought scenario analysis. 


This stage will seek to determine the District’s future demand scenarios as they pertain to land use designations, growth projections, water use trends, and environmental & regulatory demands. 


This stage will seek to determine the District’s future supply scenarios as they pertain to land use designations, growth projections, water use trends and environmental & regulatory demands.


Recap of February 21 Meeting:

NID staff provided an overview of its Reservoir Operations Model (ResSim Model) which will be used to model reservoir operations at one or more reservoirs simultaneously.

NID also adopted its proposed Plan for Water Policy, which outlines staff’s intent to provide an annual report to the Board of Directors to monitor the accuracy of Plan for Water modeling scenarios and also includes the intent to update Plan for Water model data every 5 years to incorporate new climate change, water demand and water diversion data.

Looking ahead to April 11:

Next, NID staff will provide an overview of the Hydrologic Modeling System (HEC-HMS). HEC-HMS is used for simulating the precipitation-runoff processes of drainage basins, including large river basin water supply, flood hydrology, and small urban or natural watershed runoff.

In the near future, there will also be a discussion on Global Climate Projections and 
Unimpaired Hydrology.

See meeting materials below, for additional detail.

NID’s community partners and allies are ready and willing to be of assistance in the planning process. As Plan for Water progresses, it will be essential that key stakeholders, experts, and community members are utilized to help inform the decision-making process, as we believe that the best policies are informed by science and data. SYRCL will continue to be an active participant in the Plan for Water Process and encourages the public to stay informed and engaged as well. 

Join the Plan for Water Meeting either in person or virtually on April 11 




  • Call the Meeting to Order
  • Pledge of Allegiance
  • Roll Call


  • Plan for Water Matrix and Process Check-in – Matrix
  • Plan for Water Workshop – Stage 7, 8, and 9: Hydrology and Hydrography – HECHMS Development – Presentation


The workshop will be held at NID’s main office at 1036 West Main Street, Grass Valley.

 To participate via Zoom, click the following: https://us02web.zoom.us/j/81569893448

To join audio using telephone: (669) 900-6833 or (346) 248-7799 or (253) 215 8782

Webinar ID: 815 6989 3448 Or One tap mobile: US: +16694449171,,81569893448# or +16699006833,,81569893448#

Read more about the Plan for Water, click here.

You can also write to NID with comments or questions at pfw@nidwater.com

Thank you for your continued support and vigilance on this vital issue.  

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