Transport and Retention of Nitrogen, Phosphorus and Carbon in North America’s Largest River Swamp Basin, the Atchafalaya River Basin
| Autor: | Y. Jun Xu |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
riverine carbon
lcsh:Hydraulic engineering Floodplain riverine wetlands Geography Planning and Development Drainage basin Wetland Aquatic Science Biochemistry Swamp chemistry.chemical_compound lcsh:Water supply for domestic and industrial purposes Nitrate lcsh:TC1-978 Mississippi-Atchafalaya River system Water Science and Technology Total organic carbon Hydrology lcsh:TD201-500 geography geography.geographical_feature_category riverine nutrients nutrient removal eutrophication chemistry Environmental science Water quality Eutrophication |
| Zdroj: | Water; Volume 5; Issue 2; Pages: 379-393 Water, Vol 5, Iss 2, Pp 379-393 (2013) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w5020379 |
| Popis: | Floodplains and river corridor wetlands may be effectively managed for reducing nutrients and carbon. However, our understanding is limited to the reduction potential of these natural riverine systems. This study utilized the long-term (1978–2004) river discharge and water quality records from an upriver and a downriver location of the Atchafalaya River to quantify the inflow, outflow, and inflow–outflow mass balance of total Kjeldahl nitrogen (TKN = organic nitrogen + ammonia nitrogen), nitrate + nitrite nitrogen (NO3 + NO2), total phosphorous (TP), and total organic carbon (TOC) through the largest river swamp basin in North America. The study found that, over the past 27 years, the Atchafalaya River Basin (ARB) acted as a significant sink for TKN (annual retention: 24%), TP (41%), and TOC (12%), but a source for NO3 + NO2 nitrogen (6%). On an annual basis, ARB retained 48,500 t TKN, 16,900 t TP, and 167,100 t TOC from the river water. The retention rates were closely and positively related to the river discharge with highs during the winter and spring and lows in the late summer. The higher NO3 + NO2 mass outflow occurred throughout spring and summer, indicating an active role of biological processes on nitrogen as water and air temperatures in the basin rise. |
| Databáze: | OpenAIRE |
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