Attributes for NHDPlus Version 2.1 Catchments and Modified Routing of Upstream Watersheds for the Conterminous United States: Contact Time

This tabular data set represents contact time, the length of time it takes for water to drain along subsurface flow paths to the stream, compiled for two spatial...本表格数据集表征了水体沿地下渗流路径汇入溪流所需的接触时间，即水体沿此类路径排至溪流的耗时时长，该数据集基于两类空间构建。