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Roundtable: Hetch Hetchy Reservoir Forecasting and Planning
Tuesday, May 10, 2022, 3:30 AM - 4:30 PM EDT
Category: Events

Hetch Hetchy Reservoir Forecasting and Planning: Information and Techniques for Addressing Multiple Management Objectives and Variable Conditions

River Management Roundtable
May 10 | 3:30 - 4:30 p.m. ET

San Francisco Public Utilities Commission (SFPUC)'s Hetch Hetchy Water and Power Division operates three storage reservoirs on the Tuolumne River system in the Sierra Nevada Mountains in central California. The primary water storage reservoir is Hetch Hetchy Reservoir, which provides approximately 85% of the SFPUC annual water supply. Management objectives include: 1) meeting minimum environmental release standards, 2) safe operation of the dam and reservoir, 3) satisfying year-round water delivery demands, 4) producing power generation with excess available water and 5) scheduling valve releases to mitigate environmental impacts downstream on the Tuolumne River. Although these objectives can sometimes be at odds with one another, forecasting and planning techniques can be leveraged to optimally manage natural inflows. Forecasting and planning occurs on various time scales, ranging from daily to seasonally, with the frequency of updates sometimes dependent on changing weather regimes. This talk will provide an overview of the reservoir system and will focus on techniques and strategies that the SFPUC uses for management of variable river runoff in a mountain watershed.


Reggie Walters Reggie Walters is a Water Operations Analyst with Hetch Hetchy Water & Power, division of the San Francisco Public Utilities Commission. He's been with the agency since June 2018, before which he worked in water resources at Idaho Power Company in Boise, ID. He holds master’s degree in Hydrologic Science from Boise State University.


River Management Roundtables are open to both RMS members and non-members. There is no cost to attend, but registration is required! We share recordings from our Roundtables, so even if you can't make it, you can register to receive the recording and links. You can access this recording as well as dozens of previous Roundtables, webinars and workshops in our River Training Channel.


About RMS River Management Roundtables

Each month, the River Management Society hosts virtual conversations with professional river, greenway, and water trails leaders, planners, and managers whose community, region, state and federal river will benefit from the experiences of peer-to-peer sharing. Our goal is to facilitate an open forum to support your work managing rivers. We work together to tackle common issues by asking questions, sharing solutions and building comradery.