Lower American River restoration spawning surveys at project and control reaches

Sacramento Water Forum has implemented 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 was 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.

萨克拉门托水论坛（Sacramento Water Forum）已在美洲河下游的下水手滩（Lower Sailor Bar）、尼姆巴斯盆地（Nimbus Basin）及河弯上游段（Upper River Bend）区域，实施了鲑科鱼类产卵与育幼栖息地修复增强项目。本次修复工程涵盖铺设砾石以恢复超18英亩的产卵栖息地，以及开展河道内/漫滩地形修整以营造超14英亩的育幼栖息地。下水手滩与尼姆巴斯盆地的工程已于2022年夏季完工，河弯上游段工程则于2023年夏季竣工。本项目的目标是在常规流量条件下，提升鲑科鱼类现有产卵与育幼栖息地的规模与质量。此项工作服务于本项目的成效监测，包括修复前后的产卵与育幼（浮潜）调查，同时可为绩效指标设定及适应性管理策略的制定提供支撑。