Hydraulics & Waterways

Oral

394958 - Field Study of Total Dissolved Gas Generation Downstream of the Seven Mile Dam in British Columbia

Monday, June 4
2:00 PM - 3:30 PM
Location: Regency Room
Co-Authors: David Zhu, Edmonton – University of Alberta

The generation and super-saturation of total dissolved gases (TDGs) is an important issue for hydropower operators given its implication in fish mortality downstream of hydropower facilities. In order to evaluate the mechanism of generation and dissipation of TDGs in rivers, field work was carried out at the Seven Mile Dam in the Pend d’Oreille River in British Columbia during the summer of 2017 with a variety of operational scenarios. Two scenarios were conducted considering the combinations of different spillway discharges and generation flows. Continuous monitoring probes were installed to measure TDG levels in the forebay and downstream of the Seven Mile Dam, and spot measurements were taken at a number of river cross-section from a boat. The results of the field work show that much higher levels of TDG existed in the forebay of the Seven Mile Dam due to the spill from an upstream dam. However, when these flows passed through the spillways the TDG levels were significantly decreased. Analysis of both generation and degas of TDGs were conducted in this study, and degassing is supposed to be an essential process for predicting TDG generation of spillways.

Pengcheng Li

PhD Student
University of Alberta

Presentation(s):

Send Email for Pengcheng Li


Assets

394958 - Field Study of Total Dissolved Gas Generation Downstream of the Seven Mile Dam in British Columbia



Attendees who have favorited this

Please enter your access key

The asset you are trying to access is locked. Please enter your access key to unlock.

Send Email for Field Study of Total Dissolved Gas Generation Downstream of the Seven Mile Dam in British Columbia