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Water Quality
Jamie Powell

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%…

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Jamie Powell May 3, 2022
bugs
Water Quality
Rob Van Kirk

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…

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Rob Van Kirk April 8, 2021
Constant outflow scenario
Water Quality
Rob Van Kirk

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…

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Rob Van Kirk December 30, 2020
Henry's Fork Watershed Total Diverson
Fisheries
Rob Van Kirk

The Paradox of Irrigation Efficiency

Diversion from the Henry’s Fork has decreased 30% over the past 40 years, yet consumptive use of water by crops has increased, there is…

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Rob Van Kirk December 10, 2018
Henry's Fork Watershed Snow Water Equivalent graph
Fisheries
Rob Van Kirk

Timing of snowmelt: Why is it Important and What Do We Know About it?

Timing of snowmelt runoff affects river ecology, trout behavior, fishing experience, and mid-summer streamflow in natural and regulated…

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Rob Van Kirk March 19, 2017
Man fishing
Fisheries
Christina Morrisett

Winter on the Henry’s Fork: Flow, Temperature, and Trout

By Christina Morrisett and Rob Van Kirk During the Thanksgiving Holiday, we received a number of calls from concerned anglers about low…

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Christina Morrisett December 4, 2015
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Recent Posts
  • How to Train Your Aquatic Vertebrate
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  • Summer 2026: Water Quality Reflection and Forecast for Island Park
  • SUMMER ON THE SOUTH FORK
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Ashton, Idaho 83420
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