| Main Title |
Mass Balance Model of Trace Metals in Several Delaware Watersheds. |
| Author |
Bigg, R. B. ;
Mille, J. C. ;
|
| CORP Author |
Delaware Univ., Newark. Coll. of Marine Studies. |
| Year Published |
1973 |
| Report Number |
DI-14-31-0001-3508 ;DI-14-31-0001-3808; OWRR-A-018-DEL; 02443,; A-018-DEL(2) |
| Stock Number |
PB-226 243 |
| Additional Subjects |
Delaware ;
Trace elements ;
Watersheds ;
Water pollution ;
Cadmium ;
Copper ;
Lead(Metal) ;
Mercury(Metal) ;
Concentration(Composition) ;
Rainfall ;
Hydrogeology ;
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-226 243 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
48p |
| Abstract |
Concentrations of copper, cadmium, lead, and mercury were measured in seven Delaware streams and in rainfall at four locations. Annual inputs of metal to watersheds from rainfall and outputs of metal dissolved in streams were calculated. High (exceeding U.S.P.H.S. drinking water standards) concentrations of cadmium and lead were evident in rainfall especially during the winter. Metal concentrations in streams never reached such high concentrations. In southern Delaware 90% of the cadmium and 70% of the copper that enters the watershed dissolved in rain is retained by the watershed or passes out associated with suspended particulate matter. In northern Delaware, 80% of the cadmium and all of the copper (on a mass balance) that enters watersheds dissolved in rain exits the watersheds dissolved in the streams. |
