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Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System

Decreases in shallow-water habitat area (SWHA) in the Lower Columbia River and Estuary (LCRE) have adversely affected salmonid populations. We investigate the causes by hindcasting SWHA from 1928 to 2004, system-wide, based on daily higher high water (HHW) and system hypsometry. Physics-based regres...

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Main Authors: Templeton, William J., Jay, David A., Diefenderfer, Heida L.
Format: Book
Language:English
Published: Springer 2023
Subjects:
SWHA
HHW
Online Access:https://link.springer.com/article/10.1007/s12237-023-01229-3
https://dlib.phenikaa-uni.edu.vn/handle/PNK/9442
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spelling oai:localhost:PNK-94422023-10-04T03:19:43Z Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System Templeton, William J. Jay, David A. Diefenderfer, Heida L. SWHA HHW Decreases in shallow-water habitat area (SWHA) in the Lower Columbia River and Estuary (LCRE) have adversely affected salmonid populations. We investigate the causes by hindcasting SWHA from 1928 to 2004, system-wide, based on daily higher high water (HHW) and system hypsometry. Physics-based regression models are used to represent HHW along the system as a function of river inflow, tides, and coastal processes, and hypsometry is used to estimate the associated SWHA. Scenario modeling is employed to attribute SWHA losses to levees, flow regulation, diversion, navigational development, and climate-induced hydrologic change, for subsidence scenarios of up to 2 m, and for 0.5 m fill. For zero subsidence, the system-wide annual-average loss of SWHA is 55 ± 5%, or 51 × 105 ha/year; levees have caused the largest decrease (54+5−14 %, or ~ 50 × 105 ha/year). The loss in SWHA due to operation of the hydropower system is small, but spatially and seasonally variable. 2023-10-04T03:19:42Z 2023-10-04T03:19:42Z 2023 Book https://link.springer.com/article/10.1007/s12237-023-01229-3 https://dlib.phenikaa-uni.edu.vn/handle/PNK/9442 en application/pdf Springer
institution Digital Phenikaa
collection Digital Phenikaa
language English
topic SWHA
HHW
spellingShingle SWHA
HHW
Templeton, William J.
Jay, David A.
Diefenderfer, Heida L.
Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System
description Decreases in shallow-water habitat area (SWHA) in the Lower Columbia River and Estuary (LCRE) have adversely affected salmonid populations. We investigate the causes by hindcasting SWHA from 1928 to 2004, system-wide, based on daily higher high water (HHW) and system hypsometry. Physics-based regression models are used to represent HHW along the system as a function of river inflow, tides, and coastal processes, and hypsometry is used to estimate the associated SWHA. Scenario modeling is employed to attribute SWHA losses to levees, flow regulation, diversion, navigational development, and climate-induced hydrologic change, for subsidence scenarios of up to 2 m, and for 0.5 m fill. For zero subsidence, the system-wide annual-average loss of SWHA is 55 ± 5%, or 51 × 105 ha/year; levees have caused the largest decrease (54+5−14 %, or ~ 50 × 105 ha/year). The loss in SWHA due to operation of the hydropower system is small, but spatially and seasonally variable.
format Book
author Templeton, William J.
Jay, David A.
Diefenderfer, Heida L.
author_facet Templeton, William J.
Jay, David A.
Diefenderfer, Heida L.
author_sort Templeton, William J.
title Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System
title_short Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System
title_full Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System
title_fullStr Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System
title_full_unstemmed Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System
title_sort shallow-water habitat in the lower columbia river estuary: a highly altered system
publisher Springer
publishDate 2023
url https://link.springer.com/article/10.1007/s12237-023-01229-3
https://dlib.phenikaa-uni.edu.vn/handle/PNK/9442
_version_ 1779307182524727296
score 8.881002

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