Snow can affect groundwater levels by replenishing groundwater supplies as it melts. When snow melts, the water seeps into the ground and recharges the aquifers, which can help to increase groundwater levels. This is particularly important in regions where snowmelt is a significant source of water for groundwater recharge. Additionally, snowmelt can also contribute to surface runoff, which can indirectly impact groundwater levels by influencing water availability in rivers and streams that feed into aquifers.