Effect of Environmental Setting on Sediment, Nitrogen, and Phosphorus Concentrations in Albemarle-Pamlico Drainage Basin, North Carolina and Virginia, USA

1998 ◽  
Vol 22 (6) ◽  
pp. 887-903 ◽  
Author(s):  
G. MCMAHON ◽  
D. A. HARNED
Keyword(s):  
North Carolina ◽  
Drainage Basin ◽  
Nitrogen And Phosphorus ◽  
Environmental Setting

Contribution of nitrogen and phosphorus by precipitation in the drainage basin of the Santillana Reservoir (Madrid)

1994 ◽  
Vol 23 (2) ◽  
pp. 99-104 ◽  
Author(s):  
B. Lacalle Pareja ◽  
C. G�mez Artola ◽  
F. L�pez Vera
Keyword(s):  
Drainage Basin ◽  
Nitrogen And Phosphorus

Fine-root biomass and nutrient cycling in Aristida stricta in a North Carolina coastal plain savanna

1984 ◽  
Vol 62 (4) ◽  
pp. 823-829 ◽  
Author(s):  
Kathryn A. Saterson ◽  
Peter M. Vitousek
Keyword(s):  
North Carolina ◽  
Coastal Plain ◽  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Low Fertility ◽  
Root Production ◽  
Nitrogen And Phosphorus ◽  
Different Tissues ◽  
Slow Turnover

Seasonal changes in total fine-root biomass and the allocations of nitrogen and phosphorus to roots, root crowns, and leaves of Aristida stricta were measured on a North Carolina coastal plain savanna. Total fine-root biomass was determined from sequential root cores taken over 12 months. Total root biomass decreased from spring to late fall and then increased in winter. Root production and turnover estimates indicate that this low-fertility savanna has a relatively large root biomass and slow turnover. The pattern of allocation of biomass, nitrogen, and phosphorus to different tissues of Aristida stricta indicates that throughout the year the greatest percentage of biomass and nutrients is in roots.

Modeling water and nutrients fluxes in the Büyük Menderes drainage basin, Turkey

2009 ◽  
Vol 59 (3) ◽  
pp. 531-541 ◽  
Author(s):  
Ö. F. Durdu ◽  
V. Cvetkovic
Keyword(s):  
Point Source ◽  
Drainage Basin ◽  
Temporal Distribution ◽  
Aegean Sea ◽  
Nitrogen And Phosphorus ◽  
Industrial Sectors ◽  
Modeling Process ◽  
Nutrient Emissions ◽  
Catchment Modeling ◽  
River Loads

Büyük Menderes catchment, located in the southwestern part of Turkey, is one of the most populated river basins in Turkey with 2.5 millions inhabitants. Due to increasing activities in agriculture and industrial sectors, water resources management in the basin is one of the biggest matters for the future. During the past decade, it has been observed a basinwide shift to larger monocultural, intensively operated farm units. Therefore, there is land use conversion from native lands to agriculture. The threat of nutrients pollution, nitrogen and phosphorus, has become a preoccupation since many lands and rivers undergo a eutrophication process. The discharge of nutrients from Büyük Menderes basin to the Aegean Sea through Büyük Menderes river also needs to be reduced in order to bring the eutrophication problems under lasting control. In this paper, the PolFlow model embedded in PCraster is applied to the catchment for quantifying water and substances fluxes for the five-year period, 1999–2004. The implementation of the model in the catchment allows describing the water balance and thus nutrient transport on the landscape surface but also through the soil and aquifer's layers. Modeling process is complicated by the transfer of nutrients from diffuse and point-source emissions, managed by retention and periodic release from storages within the catchment. Modeling diffuse and point-source nutrient emissions contribution to river loads can be improved by better knowledge about spatial and temporal distribution of this retention and release in the basin.

Effects of stream channelization on exports of nitrogen and phosphorus from north Carolina coastal plain watersheds

1984 ◽  
Vol 8 (2) ◽  
pp. 151-160 ◽  
Author(s):  
Laura A. Yarbro ◽  
Edward J. Kuenzler ◽  
Patrick J. Mulholland ◽  
Robert P. Sniffen
Keyword(s):  
North Carolina ◽  
Coastal Plain ◽  
Nitrogen And Phosphorus
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