ANTHROPOGENIC REDUCTION OF THE NATURAL SUPPLY OF SEDIMENTS TO THE COASTS OF WASHINGTON, OREGON, AND CALIFORNIA

The general increase of human activities, including the exploitation of the hydraulic and sediment resources of rivers, has caused extensive coastal erosion throughout the world, especially during the last 150 years or so. The true costs and impacts of this erosion have not been reflected in the price of providing commodities such as sand and gravel. These impacts and their estimated costs are presented using information from the states of Washington, Oregon, and California on the Pacific Coast of the United States of America.