Trend Analysis of Nutrient Concentrations and Loads in Surface Water in an Intensively Fertilized Watershed
Bouraoui, F; Turpin, N; Boerlen, P
| HERO ID | 4489898 |
|---|---|
| In Press | No |
| Year | 1999 |
| Title | Trend Analysis of Nutrient Concentrations and Loads in Surface Water in an Intensively Fertilized Watershed |
| Authors | Bouraoui, F; Turpin, N; Boerlen, P |
| Journal | Journal of Environmental Quality |
| Volume | 28 |
| Issue | 6 |
| Page Numbers | 1878-1885 |
| Abstract | At a watershed in an intensively farmed region of Brittany, France, nutrient concentrations and loads in surface water were examined over a 10-yr period. The annual nitrate and total phosphorus concentrations were compared with rainfall and land use to evaluate the major factors affecting the nutrient losses. The watershed was characterized by heavy fertilization. The mean nutrient concentration was determined as the sum of instantaneous fluxes of nutrients over the desired time period divided by the water flux over the same time period. Resulting data are presented to show the monthly and annual nitrate and total phosphorus concentrations. The results show no statistical evidence of a trend for the monthly mean NO sub(3) and total P loads. In terms of NO sub(3), the percent area of the watershed covered by corn had the largest absolute impact on the annual concentration, but rainfall also played a major role, as the drier years corresponded to the lowest annual NO sub(3) concentrations. Most of the excess P was stored in the soil profile. |
| Doi | 10.2134/jeq1999.00472425002800060026x |
| Wosid | WOS:000084288300026 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: ISSN:1687-2054 |
| Is Public | Yes |
| Keyword | FRANCE; WATERSHEDS; RAINFALL; AGRICULTURAL RUNOFF; NUTRIENTS; PHOSPHORUS; NITRATES; WATER ANALYSIS; AGRICULTURAL LAND; TEMPORAL COMPARISONS |