| Abstract: | In 1996, the US Geological Survey converted its occurrence and distribution-based National Stream Quality Accounting Network (NASQAN) to a national, flux-based water-quality monitoring programme. The main objective of the revised programme is to characterize large USA river basins by measuring the fluxes of selected constituents at critical nodes in various basins. Each NASQAN site was instrumented to determine daily discharge, but water and suspended sediment samples are collected no more than 12-15 times per year. Due to the limited sampling programme, annual suspended sediment fluxes were determined from site-specific sediment rating (transport) curves. As no significant relationship could be found between either discharge or suspended sediment concentration (SSC) and suspended sediment chemistry, trace element and nutrient fluxes are estimated using site-specific mean or median chemical levels determined from a number of samples collected over a period of years, and under a variety of flow conditions. |
| Genre: | Conference Paper |
| ProdID: | 70026815 |
| Citation Author: | Horowitz, A. J. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 428 |
| Citation Issue: | 288 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | IAHS-AISH Publication |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 10 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Monitoring suspended sediment and associated trace element and nutrient fluxes in large river basins in the USA; 2004; Conference Paper; IAHS-AISH Publication; Horowitz, A. J. |
| Citation Start Page: | 419 |
| Citation Volume: | |
| Citation Year: | 2004 |
| Type: | citation/reference |
| Text: | Monitoring suspended sediment and associated trace element and nutrient fluxes in large river basins in the USA; 2004; Conference Paper; IAHS-AISH Publication; Horowitz, A. J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 2004 00:00 -0600 |
| Publisher: | |
