The service handles exchanges of hydrologic data between servers, databases, and applications for data sharing and analysis. It provides a specialized flavor of XML known as WaterML. Provided by a consortium of university hydrology programs, it is part of a Hydrology Information Service (HIS) that documents and supports research in water supplies and environmental activities within many watersheds studied by affiliated researchers.
API methods support retrieval of a list of sites studied with information objects and metadata summarizing location and conditions. The API also returns variables tracked and values logged.
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