Jump to content
Sign in to follow this  
FishnChips

Bow River Flow and Colour Summer 2019

Recommended Posts

Hello Folks

I am puzzled as to the above normal water level in the Bow this summer. Early on, late melt and rain may have been factors. As summer progressed, it is noted that daytime temperatures in the Bow Valley have been slightly below normal. The colour of the Bow, is tinted with slightly more green than usual. It is the colour of spring melt, not mid-summer, and certainly not autumn. I notice more green grasses and more green algae as well.

My thought is that as the Bow glacier melts and retreats, the ice that creates the meltwater is from older ice. It may consist of ice with different particulate matter, which is then suspended in the water. It may also have a different chemical constituents, perhaps more beneficial to algae and such.

I would be most interested to hear other's thoughts on this.

Share this post


Link to post
Share on other sites

It's from organic pollutants, thanks to the city's 60,000 plus storm drains that send untreated water directly into the river. Flows have been healthy due to a cooler, wetter year, which has also increased the loading of organic pollutants .

Share this post


Link to post
Share on other sites

I was up to Lake Louise on Saturday last, and the river is higher there as well. The river is tinted blue-green over its entire course which is a bit unusual for this time of year. 

In my meandering sampling of reading disparate sources I came across a statement that rain can increase ice melt by up up to seven (7) times. I wonder if our wetter summer has played a part there? Your phrase about organic pollutants makes sense to me in this context as well. More rain would mean more organic material in suspension, some of which is natural fertilizer for algae and river grasses and so forth. 

Thank you toolman  

 

 

Share this post


Link to post
Share on other sites

Rain would also be over top of the moraines, such that it’s acting like glacier melt. I was out on a moraine last week hiking and it was leaking glacial milk in the rainy weather. 

You won’t see me complain about high flows!

Share this post


Link to post
Share on other sites

Yes, I agree, these above average flows are good, but the nutrient loading is becoming very high downstream of the Weir. This why the Brown trout move up into the NW sections of the river to spawn. Cleaner gravel.

Share this post


Link to post
Share on other sites

Has anyone been past the Elbow lately?  It's been about 4 days for me but it looked like your morning double/double thru Stanley Park. My guess is the dam refit may have something to do with it.

 

Share this post


Link to post
Share on other sites

I drove by the Elbow today and saw a few pieces of equipment in the river around Wood's Park. I must have made my first observation before they got there silt curtains installed. It's cleared considerably. Doesn't seem like the most ideal time to be causing that sort of disturbance with the spawn coming on. 

Share this post


Link to post
Share on other sites
5 hours ago, tika said:

I drove by the Elbow today and saw a few pieces of equipment in the river around Wood's Park. I must have made my first observation before they got there silt curtains installed. It's cleared considerably. Doesn't seem like the most ideal time to be causing that sort of disturbance with the spawn coming on. 

They have till the 15th to be in river unless they have an extension under the water act. I believe the work is also for increasing spawning habitat by relocating gravels that don’t get through the dam  soooo prob not one to hate on

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...