Date of Award
5-2024
Document Type
Independent Study
Degree Name
Master of Science (MS)
Department
Geography & Geographic Information Science
First Advisor
Dr. Gregory Vandeberg
Abstract
The water quality of recreational lakes degrades with Harmful Algal Blooms (HABs). HABs can block sunlight, lower oxygen levels, and may produce toxins. Industrial and domestic waste and fertilizer runoffs can enrich nutrients for HABs. Chlorophyll-a (Chl-a) is a significant indicator for tracking HABs and has been monitored increasingly using remote sensing techniques. In search for significant trends in hotspots of Chl-a concentrations in small and medium lakes of northeastern North Dakota, Chl-a water samples were collected in summer and fall of 2023. The study lakes include: Fordville Dam Recreation Area, Larimore Dam RecreationArea, Homme Dam Recreation Area, and South and North Golden Lakes. Six multi-bandcombination indexes of Sentinel-2 and Landsat 8 remote sensing satellite imagery were compared with in-situ water sampling for Chl-a concentration. The Chl-a concentration trends and patterns were discovered through Hotspot Analysis using the Getis-Ord Gi* method.
Recommended Citation
Lee, Sae Young, "Water Quality Hotspot Analysis on Chlorophyll-a to Monitor Harmful Algal Blooms in Small and Medium Lakes of North Dakota" (2024). Theses and Dissertations. 6470.
https://commons.und.edu/theses/6470