A person shall not place or cause to be placed in the channel or bed of any river, stream, wash, or arroyo, or upon any property over which the Los Angeles County flood control district has an easement for flood control purposes duly recorded in the office of the county recorder of Los Angeles County, any wires, fence, building or other structure, or any rock, gravel, refuse, rubbish, tin cans or other matter which may impede, retard, or change the direction of the flow of water in such river, stream, wash or arroyo, or that will catch or collect debris carried by such water, or that is placed where the natural flow of the stream and flood-waters would carry the same downstream to the damage or detriment of either private or public property adjacent to such river, stream, wash, arroyo or channel.