The Challenge
Record low streamflow flows are being recorded during droughts that have similar precipitation amounts to previous droughts. The “Drivers of Low Flow” study is examining which of the hypothesized factors are most contributing to this new trend such as increased developed, increased water withdrawals, climate variables (e.g., changing precipitation distribution, increased evapotranspiration). Among many impacts, low flows affect public water suppliers that depend on sufficient streamflow for withdrawals or to refill reservoirs, the integrity of aquatic habitats and the aquatic and terrestrial species that depend on them, hydropower, and recreational activities.
Project Scope
By March 2026, this study will identify the driving factors behind deteriorating streamflows during droughts. Once these factors are known and their relative importance then the State can examine which factors can be mitigated and create projects or programs around those factors.
Metrics
Process metrics are 1) data compilation (done) 2) exploratory analyses (on-going) 3) report (to be completed)
Outcome metrics: Identification of factors and their relative importance that are causing new record low flows during droughts. Then the state will assess potential actions for mitigating the driving factors.
Results
The project is still conducting exploratory analyses to determine which final analyses will be compiled in the report so results are not yet available.
Project Alignment with ResilientMass Plan Priority Actions
This project is named as a high priority action of the 2023 State Hazard Mitigation and Climate Adaptation Plan under “Identify causes of low streamflows (therefore decrease water availability) during a drought.”
Further Action
After the completion of the project, the State will assess potential actions for mitigating the driving factors of low flows during droughts.