Lower American River restoration snorkel surveys at the project and control reaches

Sacramento Water Forum will implement spawning and rearing habitat
enhancement projects on the Lower American River at the Lower Sailor
Bar, Nimbus Basin, and Upper River Bend reaches. Enhancements
include installation of gravel to restore over 18 acres of spawning
habitat and in-channel/floodplain grading to create over 14 acres of
rearing habitat. Construction of Lower Sailor Bar and Nimbus Basin
were completed in summer 2022 and Upper River Bend will be completed
in summer 2023.The goal of the projects is to increase existing
spawning and rearing habitat for salmonids under typical flows. This
work supports effectiveness monitoring for this project, including
spawning and rearing (snorkel) surveys before and after restoration.
This work also informs performance metrics and adaptive management
strategies.

萨克拉门托水务论坛（Sacramento Water Forum）将在美国河下游的下水手滩（Lower Sailor Bar）、宁姆巴斯盆地（Nimbus Basin）及河曲上游段（Upper River Bend）实施产卵场与育幼栖息地改善工程。本次改善工程涵盖两项内容：一是投放砾石以恢复超18英亩的产卵栖息地，二是开展河道内/漫滩地形整饰以打造超14英亩的育幼栖息地。下水手滩与宁姆巴斯盆地的工程已于2022年夏季完工，河曲上游段工程预计于2023年夏季竣工。本系列工程的目标是在常规流量条件下，扩增鲑科鱼类（salmonids）现有产卵与育幼栖息地的面积。本次工作将支撑本项目的效果监测，包括修复前后的产卵与育幼栖息地浮潜（snorkel）调查，同时可为绩效指标制定与适应性管理策略提供参考依据。