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Determining Minimum Drawdown Elevations in Lake Powell Using CRSS


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Created: Apr 28, 2026 at 2:26 a.m. (UTC)
Last updated: Apr 28, 2026 at 3:03 p.m. (UTC) (Metadata update)
Published date: Apr 28, 2026 at 3:03 p.m. (UTC)
DOI: 10.4211/hs.f00a71f1f6744630ad63d74cab26a8ed
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Sharing Status: Published
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Abstract

Minimum drawdown elevations have not been defined for Lake Powell, which is a gap in Lake Powell’s management that threatens hydropower generation and downstream ecosystems. To resolve this gap, we ran nine simulations using the Colorado River Simulation System (CRSS) model to evaluate four potential minimum drawdown elevation thresholds. The scenarios implemented two inflow based operational rules. An elevation of 3,500 ft is the preferred minimum drawdown elevation because it balances basin demands, ecosystem stability, and hydropower performance.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Colorado River Basin
Longitude
-111.4335°
Latitude
36.9924°

Temporal

Start Date:
End Date:

Content

How to Cite

McAllister, A. (2026). Determining Minimum Drawdown Elevations in Lake Powell Using CRSS, HydroShare, https://doi.org/10.4211/hs.f00a71f1f6744630ad63d74cab26a8ed

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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