SPARROW Modeling of Surface-Water Quality

SPAtially Referenced Regressions On Watershed Attributes

SPARROW relates in-stream water-quality measurements to spatially referenced characteristics of watersheds, including contaminant sources and factors influencing terrestrial and stream transport.

http://water.usgs.gov/nawqa/sparrow/

Water Measurement Manual (USDoI BoR)

Everything you ever wanted to know about how to measure water flow: rivers, streams, pipes, canals, weirs, flumes, dilution-tracer, equipment, velocity-area, and more

http://www.usbr.gov/pmts/hydraulics_lab/pubs/wmm/wmm.html