Water Quality

HFF BLOGS

Scroll through to read the most recent HFF Blogs and articles. Or click on the keywords at the top of the page to sort blogs and articles by topic.

Jamie Laatsch

Sep 14

Why has turbidity been high this year?

The short answer: A record cold spring, followed by extreme heat and record dry conditions contributed to a need for high outflow from...

16 views

Major weather change brings potential for sediment delivery at Island Park Dam

Rob Van Kirk

Sep 8

Major weather change brings potential for sediment delivery at Island Park Dam

A major weather pattern change away from recent record-breaking heat to more seasonable early-autumn conditions brings with it the...

47 views

Frequently Asked Questions: Turbidity in Island Park Reservoir Outflow

Rob Van Kirk

Aug 11

Frequently Asked Questions: Turbidity in Island Park Reservoir Outflow

Why is turbidity higher when flow comes out of the gates? Two dam outflow points: 1) original dam gates and 2) power plant siphon Gates...

77 views

How Drought Affects the Henry's Fork: A unique case among western rivers

Jamie Laatsch

May 3

How Drought Affects the Henry's Fork: A unique case among western rivers

What is the state of the drought in the Henry’s Fork Watershed? As of early April, water year precipitation sat at 79% of average (21%...

323 views

Henry's Fork Water Supply: Lowest water supply since 2001 and possibly 1934

Rob Van Kirk

May 3

Henry's Fork Water Supply: Lowest water supply since 2001 and possibly 1934

Each spring, Dr. Rob Van Kirk analyzes water supply data for the water year so far (Oct 1 - April 1) to assess the water situation and...

384 views

The Upper Henry’s Fork Project: bottlenecks limiting fish populations

Jack McLaren

Mar 4

The Upper Henry’s Fork Project: bottlenecks limiting fish populations

This is the second blog in a series about research activity in the Upper Henry’s Fork. Click here for part 1 and stay tuned for the next...

603 views

The Upper Henry’s Fork Project: uncovering the diamond in plain sight

Jack McLaren

Feb 4

The Upper Henry’s Fork Project: uncovering the diamond in plain sight

Background: Since 2018, PhD student Jack McLaren (that’s me!) has been working with the Foundation to understand what restricts fisheries...

362 views

Jamie Laatsch

Jan 19

HFF's Top 10 for 2021

At the end of each year, the Henry's Fork Foundation (HFF) takes a moment to reflect back on some memorable events and accomplishments...

178 views

Henry's Fork Macroinvertebrate Monitoring, 2020 & 2021

Bryce Oldemeyer

Jan 13

Henry's Fork Macroinvertebrate Monitoring, 2020 & 2021

Highlights In 2020, HFF staff were unable to collect macroinvertebrate samples at Ashton, Ora, and St. Anthony due to Covid-19. HFF staff...

191 views

Water Year 2021: Average reservoir carryover with a 2016 water supply

Rob Van Kirk

Jan 7

Water Year 2021: Average reservoir carryover with a 2016 water supply

Water year 2021 turned out to be as dry or drier than 2016 by most measures, yet Island Park Reservoir volume on September 30 was just a...

127 views

AJ Mabaka

Aug 4, 2021

That’s A Wrap!

Throughout these last few weeks I have truly been amazed by how time has flown by. As I now enter my ninth week with the Henry’s Fork...

51 views

AJ Mabaka

Jul 16, 2021

AJ’s Adventures in Ashton

Wow, having just finished my fifth week with the Henry’s Fork Foundation, I can’t believe half of my time with HFF has passed by! From...

51 views

Kam Allison

Jun 17, 2021

4th Annual HFF Summer Seminar Series

Click here to view the presentations. 4:00 to 5:00 p.m. on Tuesdays from June 15 – August 10 Presentations will be held virtually via...

72 views

Official Drought Designation and First “Dry” Year Since 2016

Rob Van Kirk

Jun 16, 2021

Official Drought Designation and First “Dry” Year Since 2016

After enjoying four years of average or slightly above average water supply, plus near record trout populations, we knew a dry year would...

47 views

Bryce Oldemeyer

Jun 16, 2021

South Fork Water and Weather Outlook

Photo Credit: Michelle Bliss Photography The South Fork watershed has been blessed with average to above-average water supply the last...

18 views

South Fork Snake River Macroinvertebrate Study 2019

Bryce Oldemeyer

May 12, 2021

South Fork Snake River Macroinvertebrate Study 2019

Highlights February 2019, we began our long-term monitoring of aquatic macroinvertebrates (insects and other creatures that live in the...

58 views

Rob Van Kirk

Apr 13, 2021

Summer 2021 Predictions: Another 2016?

This is the 5th consecutive year I have predicted upcoming spring and summer streamflow conditions based on April-1 data, including...

4 views

What Do Macroinvertebrates (Aquatic Insects) Tell Us About the Henry's Fork?

Rob Van Kirk

Apr 8, 2021

What Do Macroinvertebrates (Aquatic Insects) Tell Us About the Henry's Fork?

Highlights Aquatic macroinvertebrates—insects and other creatures that live in the stream bottom—feed trout and are the basis of...

107 views

Rob Van Kirk

Dec 30, 2020

Winter Flow Shows Increasing Trend

Winter flow at Island Park Dam is the single biggest management factor determining trout recruitment in the Henry's Fork downstream of...

1 view

Sediment Transport in 2020: What Caused the September Event?

Rob Van Kirk

Nov 13, 2020

Sediment Transport in 2020: What Caused the September Event?

Sediment export from Island Park Reservoir was 134% of average in 2020, due primarily to the highest reservoir draft since 2016. Thanks...

22 views

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