Building upon successful collaborative studies within the basin, this USGS-PSU collaborative study will utilize a novel spatial statistical approach in combination with DTS to determine: 1) locations of watershed attributes that control spatio-temporal variations of stream temperature with different degrees of disturbance; 2) degree to which beaver restoration and riparian shading affect stream temperature; and 3) the effectiveness of DTS technology combined with a distance weighted spatial algorithm in detecting thermal dynamics in study streams.
We will collect both spatial (land cover, topography, management related) and temporal factors (solar radiation, air temperature, streamflow) affecting the spatiotemporal variation of stream temperature. We will conduct two different levels of analysis - 1) a broad analysis of the whole basin with each sub-basin as a unit of analysis and 2) a detailed analysis of three sub-basins with reach as a unit of analysis.
Collect horizontal stream temperature data using DTS for three sub-basin reaches (August 2022 and 2023 - hot summer periods), as well as stream depth and canopy cover for sub-basin reaches (summer 2022 and 2023).
Derive landscape variables (slope, elevation, % vegetation and degree of fragmentation, urbanization, etc.) at each stream temperature monitoring station using GIS (Fall and Winter 2023).
Conduct spatial statistical analysis between stream temperature and landscape variables (Spring - Fall 2023).
Summarize the main findings of the project: for local agencies and organizations and the other for the broad scientific community (Winter-Fall 2024).
Create a geospatial database and a website for wider dissemination and engagement of stakeholders (Summer and Fall 2024).