Landowners whose property borders a stream or river can do a great deal to increase the survival of salmon by increasing the habitat complexity. The first step, of course, is to preserve the stream-bank vegetation that is already there. Protect wetlands on your property. They help absorb floods, filter pollutants, and store and release water slowly to maintain stream flows during the summer. Fence animals away from streams.
Animals can operate inexpensive nose-pumps to get water.
Never throw leaves or grass clippings in the stream. As the decay they use up the oxygen in the water. Minimize or eliminate use of herbicides, pesticides and fertilizers. When these chemicals reach waterways in run-off they can harm fish and water quality. Keep banks free from trash.