Conservation Directory 2004 : The Guide to Worldwide Environmental Organizations

802 hlm., 26.5 cm

Beavers P.2

Property of the Utah Dept. of fish and Game, reproduction prohibited without Dept. consent (may be reproduced only with the credit line:"National Wildlife Federation Photo

Personal Papers (MS 80-0002)

Letter from Claude D. Kelley of the National Wildlife Federation urging the recipient to purchase some specially made Wildlife Conservation Stamps to help fund the effort to conserve the natural wealth of America

Bounties are bunk /

Title from cover.Mode of access: Internet

President and Chief Executive Officer National Wildlife Federation Acknowledgements

for shepherding this report through its final edits and coordinating its release. We also sincerely thank Dr. Doug Canning of the School of Marine Affairs and Climate Impacts Group at the University o

Mitigating Impact of Devils Lake Flooding on the Sheyenne River Sulfate Concentration

Devils Lake is a terminal lake located in northeast North Dakota. Because of its glacial origin and accumulated salts from evaporation, the lake has a high concentration of sulfate compared to the surrounding water bodies. From 1993 to 2011, Devils Lake water levels rose by ~10 m, which flooded surrounding communities and increased the chance of an overspill to the Sheyenne River. To control the flooding, the State of North Dakota constructed two outlets to pump the lake water to the river. However, the pumped water has raised concerns about of water quality degradation and potential flooding risk of the Sheyenne River. To investigate these perceived impacts, a Soil and Water Assessment Tool (SWAT) model was developed for the Sheyenne River and it was linked to a coupled SWAT and CE‐QUAL‐W2 model that was developed for Devils Lake in a previous study. While the current outlet schedule has attempted to maintain the total river discharge within the confines of a two‐year flood (36 m3/s), our simulation from 2012 to 2018 revealed that the diversion increased the Sheyenne River sulfate concentration from an average of 125 to \u3e750 mg/L. Furthermore, a conceptual optimization model was developed with a goal of better preserving the water quality of the Sheyenne River while effectively mitigating the flooding of Devils Lake. The optimal solution provides a “win–win” outlet management that maintains the efficiency of the outlets while reducing the Sheyenne River sulfate concentration to ≤600 mg/L