搜索结果: 1-15 共查到“水文学 Nitrogen”相关记录66条 . 查询时间(0.125 秒)
Heavy rainfall drives one-third of nitrogen runoff, according to new study（图）
Heavy rainfall drives one-third nitrogen runoff according new study
2020/11/13
Heavy rain events that occur only a few days a year can account for up to one-third of the annual nitrogen runoff from farmland in the Mississippi River basin, according to a new study by Iowa St...
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...
Nitrogen, Phosphorus and Carbon Dynamics during Storms in a Glaciated Third-Order Watershed in the US Midwest
DOC nitrate phosphorus hydrology
2015/1/16
The characterization of the nutrients nitrogen, phosphorus and carbon (NPC) export to streams during storms is an integral part of understanding processes affecting water quality. Despite the fact tha...
NITROGEN AND PHOSPHORUS CYCLING IN MIDWESTERN AGRICULTURAL WETLANDS IN RESPONSE TO ALTERED HYDROLOGIC REGIMES
Wetland soil Midwest agriculture
2015/1/16
The transfer of nutrients from US Midwest croplands into surface waters causes eutrophication and a decline in water quality. Temporary retention of nutrient-rich runoff in constructed wetlands can he...
Using satellite hyperspectral imagery to map soil organic matter, total nitrogen and total phosphorus
total nitrogen total phosphorus partial least squares
2015/1/16
Up-to-date and accurate information on soil properties is important for precision farming and environmental management. The spatial information of soil properties allows adjustments of fertilizer appl...
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...
Atmospheric inputs of phosphorus and nitrogen to the southwest Mediterranean region: Biogeochemical responses of high mountain lakes
Biogeochemical responses Atmospheric inputs
2014/5/4
We quantified dry and wet deposition of dust, nitrogen, and phosphorus over the southwest Mediterranean region (Sierra Nevada, Spain) and assessed its effects on the nutrient status and the chlorophyl...
Ensemble modelling of nitrogen fluxes: data fusion for a Swedish meso-scale catchment
Ensemble modelling nitrogen fluxes data fusion
2010/12/22
Model predictions of biogeochemical fluxes at the landscape scale are highly uncertain, both with respect to stochastic (parameter) and structural uncertainty. In this study 5 different models (LASCAM...
Modelling the inorganic nitrogen behaviour in a small Mediterranean forested catchment,Fuirosos (Catalonia)
inorganic nitrogen behaviour Mediterranean forested catchment Fuirosos
2010/2/20
The aim of this work was to couple a nitrogen (N) sub-model to already existent hydrological lumped (LU4-N) and semi-distributed (LU4-R-N and SD4-R-N) conceptual models, to improve our understanding o...
Modelling the inorganic nitrogen behaviour in a small Mediterranean forested catchment,Fuirosos (Catalonia)
inorganic nitrogen behaviour Mediterranean forested catchment Fuirosos
2010/3/5
The aim of this work was to couple a nitrogen (N) sub-model to already existent hydrological lumped (LU4-N) and semi-distributed (LU4-R-N and SD4-R-N) conceptual models, to improve our understanding o...
EXPERIMENTAL STUDY ON THE NITROGEN CIRCULATION OF A BIOLOGICAL POND
EXPERIMENTAL STUDY NITROGEN CIRCULATION BIOLOGICAL POND
2009/10/29
The ammonification and nitritation potentials of a biological pond in
southern Finland have been expcrirnentally explored at the laboratory
scale.
The intention of this study was to explore experim...
Movement and leaching of residual nitrogen in soil has been studied in some
details in a lysimeter experiment. Profile measurements of soil water and of
nitrogen concentration in addition to measure...
Effects of Land Use on the Diffuse Load of Phosphorus and Nitrogen
Land Use Diffuse Load Phosphorus Nitrogen
2009/10/28
The diffuse load of phosphorus and nitrogen was studied in 23 small drainage
basins in different parts of Finland between 1965 and 1974. Total phosphorus
and total nitrogen concentrations were analy...
Nitrogen in Soil Water
Nitrogen Soil Water
2009/10/28
This review comprises a general description of nitrogen in soil water and the
use of nitrogen fertilizer. The following investigations on nitrogen leaching
and transformations are described: Investi...
Nitrogen Balance in Fertilizer Application and Plant Production
Nitrogen Balance Fertilizer Application Plant Production
2009/10/28
The investigation comprises several agricultural crops, a Karup locality (56O16'
N, 9"9' E) with an average annual precipitation of 775 mm and coarse sand
(soil I), and a T5strup locality (5Y40' N, ...