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Turbidity in Lake Sunapee (2011 - 2023)

This series of maps shows the changes in turbidity across Lake Sunapee from 2011 to 2023, offering a visual representation of how water clarity has fluctuated over time. The IDW interpolation used here also helps highlight areas in the lake that experience more significant variations than others. 

Turbidity, which is a measure of the cloudiness or haziness of water, can indicate the presence of suspended particles like sediment, silt, or organic material, and is closely tied to water quality and ecosystem health. 

High turbidity levels reduce sunlight penetration, impacting aquatic plants and disrupting the food chain. Fish and other organisms that rely on clear water for survival may struggle in areas of high turbidity. Additionally, elevated turbidity often accompanies other pollutants, like phosphorus, which can fuel algal growth and decrease oxygen availability.

Notice the relatively high turbidity around the lake in 2021, concentrating near Sunapee Ski resort. This suggests possible influences like elevated human activity or runoff in that area during that time period.

Also notice in 2023 the patterns shifting to an overall darker color scheme than the previous years. Further research is needed to determine the causes of these trends.

By tracking turbidity trends in Lake Sunapee, we can assess the impact of land use changes, stormwater management, and erosion control efforts. Consistent increases in turbidity may indicate a need for better soil conservation or water filtration practices within the watershed to prevent further sedimentation.

Total Phosphorus Over Time (2011-2023)

Phosphorus is one of the most significant nutrients influencing lake health, especially in New Hampshire’s freshwater systems like Lake Sunapee. While some phosphorus is essential for supporting aquatic life, too much can lead to eutrophication, causing harmful algal blooms and degraded water quality. This map series of Total Phosphorus (TP) from 2011 to 2023 illustrates changes in phosphorus concentrations, highlighting potential problem areas where nutrient loading may be occurring.

Elevated phosphorus levels can come from sources such as agricultural runoff, septic systems, or stormwater that carries fertilizers and organic matter into the lake. As phosphorus levels increase, algae populations can spike, leading to decreased oxygen levels, murky water, and negative impacts on fish and other wildlife. 

Notice how the areas with higher TP concentrations often coincide with regions of elevated turbidity during the same time periods, suggesting a clear connection between these factors and their impact on water quality in those zones. 

Monitoring TP levels helps guide restoration efforts and assess the long-term health of Lake Sunapee. Keeping phosphorus in check is vital for preventing further nutrient pollution and protecting the water clarity and aesthetic quality of the lake, which is crucial for recreational activities like boating and swimming.

pH Levels Over Time (2011-2023)

The pH of a lake can influence a range of biological processes, from aquatic life health to nutrient cycling. In this series of maps, we observe the spatial variability in pH across Lake Sunapee from 2011 to 2023. 

pH is a crucial indicator of water quality, as it determines the acidity or alkalinity of the lake. In New Hampshire, the natural pH of lakes can fluctuate due to factors like acidic rainfall, surrounding vegetation, or watershed development. The pH of Lake Sunapee has historically remained within a neutral range, which is essential for the survival of aquatic species.

Though the pH in this series generally remains within a narrow range of about 6.5 - 7.0, slight changes can signal shifts in the lake's chemistry or incoming pollutants. By comparing these maps, you can see how pH levels have remained relatively stable but with small fluctuations that may warrant further investigation. 

Maintaining a balanced pH is vital for lake health. Aquatic organisms are sensitive to even small pH fluctuations; when pH drops too low or rises too high, it can affect species composition, disrupt food webs, and hinder the ability of fish and other organisms to thrive. The pH data visualized from 2011 to 2023 provides insights into potential stressors on Lake Sunapee’s ecosystem, with any downward trends possibly signaling acidification risks that could negatively impact the lake’s overall health.

The GIF shows pH distribution across the lake, allowing us to pinpoint areas that may require closer monitoring. Observing how pH changes spatially and temporally helps inform lake management efforts and supports initiatives to reduce sources of pollution or other influences driving pH shifts. For Lake Sunapee, maintaining a stable pH is critical to preserving its recreational value and biodiversity.