Ephemeral streams, often overlooked, are major contributors to US river flow and water quality
Ephemeral streams – temporary streams that only flow after rainfall or snowmelt – contribute more than 50% of the flow in downstream river systems and likely have a major influence on water quality across the United States, according to a new modeling study. The findings show how important ephemeral streams are for the transport of water and pollution into larger, more permanent water bodies. Excluding these streams from coverage under the U.S. Clean Water Act, say the authors, would significantly limit federal authority to protect downstream water quality. Ephemeral streams, which flow only in direct response to precipitation and are disconnected from groundwater sources, ...
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