Characterization of natural and anthropogenic features that define the environmental settings of sampling sites for streams and groundwater, including drainage basins and groundwater study areas, is an essential component of water-quality and ecological i
Nakagaki, Naomi nakagaki@usgs.gov,Hitt, Kerie J.,Price, Curtis V. cprice@usgs.gov,et al. Methods to characterize environmental settings of stream and groundwater sampling sites for National Water-Quality Assessment. 2012-01-01.