Valuing Aquatic Ecosystem Health at a National Scale: Modeling Biological Indicators Across Space and Time
EPA estimates the benefits of preserving aquatic resources using the water quality index (WQI). The WQI focuses on metrics related to human use, such as recreation, but fails to fully capture aspects important to nonuse values of aquatic ecosystems, such as existence values. Stated preference surveys can quantify the nonuse values of streams and lakes […]