The Impact of Gravel Road on Streams in Alaska

Impact of Gravel Road on Streams

A new gravel road being cut into the side of a mountain just north of Anchorage, Alaska can have significant effects on the nearby streams. As the snow melts in June, the fine gravel and sand from the disturbed region quickly tumbles into the bottom of the streams. This sudden influx of sediment can alter the composition of the streams and their erosion capacity.

Changes in Stream Content: The addition of more rocks and silt from the gravel road would make the water of the stream cloudier. This increase in sediment can have various impacts on the ecosystem of the stream. It may affect the ability of hunters that rely on clear water to catch prey, and it may also disrupt the balance of aquatic life in the stream.

Influence on Erosion Capacity: The new sediment introduced to the stream can enhance its ability to erode the stream bed. Through processes like abrasion and attrition, the increased sediment load can lead to faster erosion of the stream banks. This erosion can change the shape and depth of the stream, affecting the surrounding environment.

Effects on Plant Life and Sunlight Penetration: The presence of more sediments in the stream can also impact the plant life at the bottom of the stream. It may limit the growth of aquatic plants and disrupt the habitat of various organisms. Additionally, the increased sediment load can affect the amount of sunlight that can penetrate to the stream bottom during the summer, potentially impacting the entire stream ecosystem.

In conclusion, the construction of a gravel road near streams in Alaska can have far-reaching effects on the streams' content, erosion capacity, plant life, and overall ecosystem. It is essential to consider these impacts and implement measures to mitigate any negative consequences on the delicate balance of aquatic environments.