搜索结果: 31-45 共查到“水文学 Nitrogen”相关记录66条 . 查询时间(0.69 秒)
What affects the nitrogen retention in Tatra Mountains lakes' catchments in Poland?
nitrogen retention Tatra Mountains lakes' catchments
2009/4/29
The study of acidification and recovery of two lakes situated in the Polish Tatra Mountains, exposed to similar deposition of acidic substances but differing in altitude, catchment morphology, hydrol...
Climate control on sulphate and nitrate concentrations in alpine streams of Northern Italy along a nitrogen saturation gradient
surface waters nitrate concentrations sulphate nitrogen saturation gradient
2009/4/29
The role of meteorology, hydrology and atmospheric deposition on the temporal pattern of SO4 and NO3 concentrations was investigated for three streams draining alpine catchments in Northern Italy.
...
The runoff of suspended, substances, nitrogen, and phosphorus by enforced draining during the ploughing season Experiments in paddy fields
enforced draining Lake Biwa nitrogen paddy field phosphorus SS
2009/4/2
The runoff of suspended substances (SS), nitrogen, and phosphorus by enforced draining during the ploughing season was calculated from experiments in two paddy fields. The area of a paddy field was 30...
Critical loads of sulphur and nitrogen for freshwaters in Great Britain and assessment of deposition reduction requirements with the First-order Acidity Balance (FAB) model
critical loads acidification nitrate FAB model
2009/3/24
The critical loads approach is widely used within Europe to assess the impacts of acid deposition on terrestrial and freshwater ecosystems.
Controls on nitrate leaching from upland moorland catchments are not yet fully understood and yet, despite agreements on emission reductions, increased surface water nitrate concentrations may affect ...
Modelling the effects of acid deposition: refinements, adjustments and inclusion of nitrogen dynamics in the MAGIC model
process-based model acid deposition
2009/3/24
The MAGIC model of the responses of catchments to acidic deposition has been applied and tested extensively over a 15 year period at many sites and in many regions around the world. Overall, the model...
Sulphur and nitrogen fluxes and budgets in the Bohemian Forest and Tatra Mountains during the Industrial Revolution (1850-2000)
emission deposition acidification
2009/3/24
Major fluxes of sulphur and dissolved inorganic nitrogen were estimated in Central European mountain ecosystems of the Bohemian Forest (forest lakes) and Tatra Mountains (alpine lakes) over the indust...
Trends in nitrogen deposition and leaching in acid-sensitive streams in Europe
Europe acid deposition nitrogen
2009/3/23
Long-term records of nitrogen in deposition and streamwater were analysed at 30 sites covering major acid sensitive regions in Europe. Large regions of Europe have received high inputs of inorganic ni...
A nitrogen model for European catchments: INCA, new model structure and equations
modelling water quality nitrogen
2009/3/17
A new version of the Integrated Nitrogen in Catchments model (INCA) was developed and tested using flow and streamwater nitrate concentration data collected from the River Kennet during 1998. INCA is ...
Nitrogen circulation in a Mediterranean holm oak forest, La Castanya, Montseny, northeastern Spain
nitrate discharge regime hyporheic zone groundwater
2009/3/17
The importance of storm frequency as well as the groundwater and hyporheic inputs on nitrate (NO3-N) and ammonium (NH4-N) levels in stream water were studied in a small perennial Mediterranean catchme...
Nitrogen concentrations in a small Mediterranean stream: 1. Nitrate 2. Ammonium
Nitrogen concentrations Nitrate Ammonium
2009/3/17
The importance of storm frequency as well as the groundwater and hyporheic inputs on nitrate (NO3-N) and ammonium (NH4-N) levels in stream water were studied in a small perennial Mediterranean catchme...
Effect on nitrate concentration in stream water of agricultural practices in small catchments in Brittany: I. Annual nitrogen budgets
nitrate diffuse pollution agricultural catchment
2009/3/17
The hydrological and biogeochemical monitoring of catchments has become a common approach for studying the effect of the evolution of agricultural practices on water resources. In numerous studies, t...
INCA Modelling of the Lee System: strategies for the reduction of nitrogen loads
modelling water quality nitrogen nitrate ammonium INCA
2009/3/17
The Integrated Nitrogen Catchment model (INCA) was applied successfully to simulate nitrogen concentrations in the River Lee, a northern tributary of the River Thames for 1995-1999. Leaching from urba...
Excess nitrogen leaching and C/N decline in the Tillingbourne catchment, southern England: INCA process modelling for current and historic time series
acid deposition recovery nitrogen Carbon-Nitrogen ratios
2009/3/17
Measurements of nitrate deposition and streamwater chemistry in the Tillingbourne Catchment, in Southern England, made in 1979-1982 and 1999-2001 show a 216% increase in Nitrogen leaching despite a r...
Modelling nitrogen dynamics and distributions in the River Tweed, Scotland: an application of the INCA model
Nitrate nitrogen modelling Tweed INCA
2009/3/17
The INCA (Integrated Nitrogen in Catchments) model was applied to the River Tweed in the Scottish Borders, a large-scale (4400km2), spatially heterogeneous catchment, draining a wide range of agricult...