The objective of this work is to understand and to propose a conceptual model for the hydrologica... more The objective of this work is to understand and to propose a conceptual model for the hydrological processes controlling N cycling and stream nitrate export (concentration, flux) throughout the hydrologic year in agricultural headwater catchments with shallow groundwater. Nitrate export by stream is controlled by hydrological processes related to water flow-paths, by nitrogen cycle processes (plant uptake, mineralization, nitrification and
In a context of water quality degradation induced by agricultural intensification, assessing the ... more In a context of water quality degradation induced by agricultural intensification, assessing the role of landscape structures as buffers represents a scientific objective as well as a necessary prerequisite for the sustainable management of water resources. Because water resources are managed at a large basin scale, we need to understand how the processes change and integrate through time and space scales. The objective of this study is to assess the buffer role of the riparian wetlands and stream system in controlling nitrate fluxes and concentrations at the outlet of an agricultural catchment of 377 km ² and analyze the influence of the seasons and the stream order on the this buffer role. Initially, we identify the physical and anthropic characteristics of the landscape that regulate nitrate fluxes in a catchment area, by investigating the role of the wetlands and streams. We then evaluate the impact of hydrological seasonal variation on the nitrate concentrations and their relat...
The objective of this work is to understand and to propose a conceptual model for the hydrologica... more The objective of this work is to understand and to propose a conceptual model for the hydrological processes controlling N cycling and stream nitrate export (concentration, flux) throughout the hydrologic year in agricultural headwater catchments with shallow groundwater. Nitrate export by stream is controlled by hydrological processes related to water flow-paths, by nitrogen cycle processes (plant uptake, mineralization, nitrification and
The objective of this work is to understand and to propose a conceptual model for the hydrologica... more The objective of this work is to understand and to propose a conceptual model for the hydrological processes controlling N cycling and stream nitrate export (concentration, flux) throughout the hydrologic year in agricultural headwater catchments with shallow groundwater. Nitrate export by stream is controlled by hydrological processes related to water flow-paths, by nitrogen cycle processes (plant uptake, mineralization, nitrification and
The Observatory for Research on Environment AgrHyS (AgroHydroSystems) is located in a catchment a... more The Observatory for Research on Environment AgrHyS (AgroHydroSystems) is located in a catchment area of intensive farming in Britain. This is a twin site (Kerbernez and Naizin) monitoring since 1976, and where various measures were greatly strengthened since ...
The objective of this work is to understand and to propose a conceptual model for the hydrologica... more The objective of this work is to understand and to propose a conceptual model for the hydrological processes controlling N cycling and stream nitrate export (concentration, flux) throughout the hydrologic year in agricultural headwater catchments with shallow groundwater. Nitrate export by stream is controlled by hydrological processes related to water flow-paths, by nitrogen cycle processes (plant uptake, mineralization, nitrification and
In a context of water quality degradation induced by agricultural intensification, assessing the ... more In a context of water quality degradation induced by agricultural intensification, assessing the role of landscape structures as buffers represents a scientific objective as well as a necessary prerequisite for the sustainable management of water resources. Because water resources are managed at a large basin scale, we need to understand how the processes change and integrate through time and space scales. The objective of this study is to assess the buffer role of the riparian wetlands and stream system in controlling nitrate fluxes and concentrations at the outlet of an agricultural catchment of 377 km ² and analyze the influence of the seasons and the stream order on the this buffer role. Initially, we identify the physical and anthropic characteristics of the landscape that regulate nitrate fluxes in a catchment area, by investigating the role of the wetlands and streams. We then evaluate the impact of hydrological seasonal variation on the nitrate concentrations and their relat...
The objective of this work is to understand and to propose a conceptual model for the hydrologica... more The objective of this work is to understand and to propose a conceptual model for the hydrological processes controlling N cycling and stream nitrate export (concentration, flux) throughout the hydrologic year in agricultural headwater catchments with shallow groundwater. Nitrate export by stream is controlled by hydrological processes related to water flow-paths, by nitrogen cycle processes (plant uptake, mineralization, nitrification and
The objective of this work is to understand and to propose a conceptual model for the hydrologica... more The objective of this work is to understand and to propose a conceptual model for the hydrological processes controlling N cycling and stream nitrate export (concentration, flux) throughout the hydrologic year in agricultural headwater catchments with shallow groundwater. Nitrate export by stream is controlled by hydrological processes related to water flow-paths, by nitrogen cycle processes (plant uptake, mineralization, nitrification and
The Observatory for Research on Environment AgrHyS (AgroHydroSystems) is located in a catchment a... more The Observatory for Research on Environment AgrHyS (AgroHydroSystems) is located in a catchment area of intensive farming in Britain. This is a twin site (Kerbernez and Naizin) monitoring since 1976, and where various measures were greatly strengthened since ...
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