Authors: Emma Parry, Nikki Trush, Christina Pondell
Mentors: Christina Pondell
Insitution: Utah Tech University
Rivers in arid environments provide extremely important sources of freshwater for local ecosystems and communities. These regions are highly vulnerable to climate change and are seeing high rates of human population growth. This leads to unsustainable demand on progressively more threatened freshwater resources. Despite the importance of these water resources for residential, agricultural, and environmental needs, there is little information available to describe long term changes to water quality in response to human and climate change. The Santa Clara River in southern Utah is one prime example of a threatened arid river system that serves as an important drinking water source to a rapidly growing human population. This 52-mile-long river flows from the Pine Valley Mountains and past the cities of Ivins, Santa Clara, and St. George before meeting with the Virgin River. This research discusses results from a water quality monitoring program initiated in February 2023. Our sampling efforts focused on the lower Santa Clara River between Gunlock Reservoir and the Virgin River confluence. We selected four sites to monitor the impacts of changes in land use and restoration efforts on the river’s water quality. In this presentation we discuss results from time series analysis and correlations between water quality, flow rates, and land use to describe how water quality responds to human and climate impacts on this arid freshwater resource. This research underscores the importance of establishing long-term monitoring capabilities for critical water quality parameters and provides valuable insights for sustainable water management and environmental conservation in southern Utah.