Here is some natural ideas that make sense.
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Stabilize Shorelines
Geese are discouraged if access to water is difficult and includes a vegetative barrier. It is best to use a combination of deciduous, evergreen, and seasonal perennial color to provide an aesthetically pleasing yet effective landscape barrier or goose deterrent.
Canada Geese prefer a gentle, grassy slope coming out of the water that enables them to easily walk into and out of the water to feed or rest. This provides a clear line of vision to avoid would-be predators and provides them easy access to the water. If access to the water is poor, the adult geese may leave that area to raise their young elsewhere.
Rock barriers make good goose deterrents. To steepen the shoreline, build a vertical seawall 3 feet above the surface of the water or create a 63-degree angle from the water's edge. Then allowing vegetation to grow tall along this slope will help protect it from erosion and keep the geese from walking up.
Rock Barriers – Place boulders that measure two feet or more in diameter along the shoreline. This will deter geese that prefer walking out on banks that are bare and gently sloping. Using a vegetative barrier in combination with the rock barrier increases its effectiveness.
Vegetative barriers are also used as geese deterrents along shorelines. These vegetative buffers need to retain their mature height throughout the year and be 10’ wide to be effective. The tall, stiff-stemmed, native warm season grasses are an ideal plant for this purpose since they maintain an upright form and height throughout the winter. Keep in mind, if you mow this vegetation, you will have eliminated the barrier. Some mixtures of cool season grasses and legumes can also function as an effective “goose deterring” buffer strip.
Most reputable landscaping companies and custom seed establishment facilities are able to provide plant selection specific to the needs of the area needing to be modified. The objective is to create a solid buffer strip that establishes a physical barrier at the shoreline. A landscape professional can help you reach your objective taking into consideration other factors like cost, how long the plants will live and be effective, the surrounding environment and soil.