Phosphorus inputs into a stream draining an agricultural watershed

✍ Scribed by A. N. Sharpley; J. K. Syers; P. W. O'Connor

• Book ID: 104648326
• Publisher: Springer Netherlands
• Year: 1976
• Tongue: English
• Weight: 681 KB
• Volume: 6
• Category: Article
• ISSN: 0049-6979
• DOI: 10.1007/bf00158714

✦ Synopsis

Changes in the concentrations of P forms with flow for the three runoff types and the stream draining an agricultural watershed were evaluated. Flow was found to be more important than concentration in determining P fluxes in surface runoff, subsurface runoff, the stream, and to a lesser extent in accelerated subsurface runoff (tile drainage). The sampling interval required to reliably evaluate the loading of P forms was 15, 60, 720, and 60 min, for surface, accelerated subsurface, and subsurface runoff, and the stream, respectively. The errors in estimates of loadings of P forms were maintained at less than 15% for the sampling time intervals selected. An inadequate frequency of sampling leads to appreciable errors in the estimates of loadings of P forms in the runoff types and the stream.