Black Rock Desert (IMAGE) University of Massachusetts Amherst Caption 94% of the water coming out of the river systems in Black Rock Desert, Nevada, and Humboldt County, California, comes from ephemeral streams. Credit Craig Brinkerhoff Usage Restrictions To be used in coverage of the study Ephemeral stream water contributions to United States drainage networks License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.