搜索结果: 1-15 共查到“水文学 Nitrate”相关记录28条 . 查询时间(0.437 秒)
Development of a Multivariate Regression Model for Soil Nitrate Nitrogen Content Prediction
linear regression multivariate statistics nitrogen NPS soil moisture spatial analysis visualization
2015/8/11
Although soil nitrate nitrogen (N) is a nutrient source for crop, it could be a potential nonpoint pollution source to the environment when its content remains high with an inappropriate management. S...
Development of a Multivariate Regression Model for Soil Nitrate Nitrogen Content Prediction
NPS soil moisture spatial analysis visualization
2015/1/6
Although soil nitrate nitrogen (N) is a nutrient source for crop, it could be a potential nonpoint pollution source to the environment when its content remains high with an inappropriate management. S...
An Attempt to Reduce Nitrate Content in Ground Water Used for Municipal Water Supply by Changing Agricultural Practices
Nitrate Content Ground Water Water Supply Agricultural Practices
2009/10/28
The heavy use of manure and fertilizers has in some parts of Sweden resulted
in unacceptable concentrations of nitrate in ground water used for private and
municipal water supply. In Halland for exa...
Trends in Nitrate Pollution of Groundwater in Denmark
Trends Nitrate Pollution Groundwater in Denmark
2009/10/28
A nation-wide investigation of nitrate concentrations in groundwater in
Denmark has been carried out. The investigation is based on analyses of
groundwater samples from app. 11,000 wells and drinkin...
Simulation of Runoff and Nitrate Transport from Mixed Basins in Sweden
Simulation of Runoff Nitrate Transport Basins in Sweden
2009/10/27
A conceptual model for simultaneous computation of runoff and inorganic
nitrogen leaching is described. The model is semi-empirical with coefficients
that are calibrated against observed data. It ha...
The Effect of Riverine Nitrate Loads on Winter Concentrations in the Great Belt,Denmark
Riverine Nitrate Loads Winter Concentrations Great Belt
2009/10/23
This paper presents a method that models the fraction of the NO, concentrations
(nitrate and nitrite) in a marine recipient resulting from riverine runoff from
land. The analysis is performed on the...
NITRATE-POLLUTED GROUNDWATER AT AZUL, ARGENTINA：CHARACTERIZATION AND MANAGEMENT ISSUES
NITRATE-POLLUTED ARGENTINA GROUNDWATER
2009/10/19
The City of Azul (Buenos Aires Province, Argentina), as many small cities in the country, is supplied entirely by local groundwater. Such waters contain variable, but generally high concentrations of ...
NITROUS OXIDE FLUXES FROM A CLAYPAN SOIL OVERLYING NITRATE-ENRICHED GLACIAL DRIFT
nitrous oxide glacial-drift aquifer claypan soil
2009/10/19
The closed chamber method was used to assess nitrous oxide (N2O) fluxes from corn (Zea mays, L.) fields during the 1995 growing season. The study area was characterized by a claypan soil overlying a n...
NITRATE CONTAMINATION IN THE PHREATIC AQUIFER OF AN AGROECOSYSTEM OF THE CHACOPAMPEANA PLAIN, CORDOBA, ARGENTINA
agroecosystem phreatic aquifer nitrate levels Los Jagüeles
2009/10/19
The functionality and pollution potential of the agroecosystem of the Los Jagüeles basin were characterized and an initial spatial assessment of nitrate levels in the phreatic aquifer was made. This a...
ELECTRONIC WATER TABLE CONTOUR MAPPING AND GROUNDWATER NITRATE INTERPOLATION AT A DAIRY FARM IN TEAGASC, JOHNSTOWN CASTLE, WEXFORD, IRELAND
ELECTRONIC WATER TABLE hydraulic conductivity CONTOUR MAPPING
2009/10/12
The objective of the present study was to construct electronic groundwater maps for the 60.5 ha dairy farm in the Teagasc Environment Research Centre at Johnstown Castle, Wexford, Ireland. Monitoring ...
Hydro-chemical characteristics of river water around Toyama bay and preliminary consideration of nitrate load toward the bay
NO3--N load Stable isotopic ratio Inorganic ion chemistry Tritium activity Toyama bay
2009/7/14
To understand hydro-chemical characteristics of river water and NO3--N load toward Toyama bay through the base flow. The hydrological field survey and analysis of inorganic ion chemistry, stable isoto...
Acidification in Three Lake District Tarns：Historical Iong term trends and modelled future behaviour under changing sulphate and nitrate deposition
Acidification nitrate deposition sulphate
2009/6/8
Three upland Lake District Tarns, Scoat, Greendale and Burnmoor, have been evaluated using MAGIC (Model of Acidification of Groundwater In Catchments) to reconstruct past, present and future chemical ...
Applying MERLIN for modelling nitrate leaching in a nitrogen saturated Douglas fir forest in the Netherlands after decreased atmospheric nitrogen input
refractory organic matter atmospheric nitrogen input nitrate leaching
2009/6/5
The MERLIN model was applied on the results of a field-scale manipulation experiment with decreased nitrogen (N) deposition in an N saturated forest ecosystem in the Netherlands. The aim was to invest...
Spatial variability of nitrate concentration in lakes in Snowdonia, North Wales, UK
Spatial variability North Wales nitrate concentration
2009/5/26
At a regional scale, high nitrate (NO3‾) concentrations in upland surface waters generally occur in tandem with high nitrogen (N) deposition levels. However, significant differences in the patte...
Assessing the model performance of an integrated hydrological and biogeochemical model for discharge and nitrate load predictions
integrated hydrological biogeochemical model
2009/5/7
In this study, we evaluate the performance of the SWAT-N model, a modified version of the widely used SWAT version, for discharge and nitrate predictions at the mesoscale Dill catchment (Germany) for ...