Non-point source pollution research trend over three decades and possible directions Prof. Dr. Ouyang Wei School of Environment Beijing Normal University wei@bnu.edu.cn
Yearly publications web of science core database,all languages,all document types,1990-2017 ts=(((diffuse pollution)or("non point"pollut*)or(nonpoint pollut*))not(air or gas)) Date 10-17-2017,6964
Publication by countries
Main Source Journals
International cooperation
1990-1994 1995-1999 International cooperation
2005-2009 2010-2014 International cooperation
Keywords patterns
Topic words patterns
Temporal patterns of keywords 1990-1994 1995-1999 2000-2004 2005-2009 2010-2014 2015-2017 BMPS Clear water act Erosion Eutrophication Modeling Nitrogen/nitrate NPS pollution Nutrients Pesticide Phosphorus Pollution Runoff Water quality Watershed management Agriculture BMPS Diffuse pollution Erosion Eutrophication GIS Groundwater Modeling NPS pollution Nutrients Phosphorus Runoff Water quality Watershed management Agriculture Diffuse pollution Eutrophication GIS Modeling Nitrogen NPS pollution Nutrients Phosphorus Pollution Water quality Watershed management Agriculture BMPS Diffuse pollution Eutrophication GIS Nitrate Nitrogen NPS pollution Nutrients Phosphorus Pollution Sediment SWAT Water quality Watershed management Agriculture BMPs Diffuse pollution Eutrophication Groundwater Nitrate Nitrogen NPS pollution Nutrients Phosphorus Pollution Runoff Sediment SWAT Water quality Watershed management Agriculture BMPs Diffuse pollution Eutrophication Heavy metals Land use Nitrate Nitrogen NPS pollution Nutrients Phosphorus Pollution Runoff SWAT Water quality Watershed management
Temporal patterns of topic words 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1990-1994 1995-1999 2000-2004 2005-2009 2010-2014 2015-2017 Water Pollution Runoff Pollution Management NPS pollution Model Water Quality Management Water quality Management Soil Runoff Nitrogen Nitrogen Nitrogen Pollution Nitrogen Nitrogen Pollution Runoff Pollution China Water quality NPS pollution Water quality Quality Phosphorus Water quality Sediment Quality Management Phosphorus Runoff Runoff Groundwater Management Runoff Pollution Erosion Nitrate Nutrient Phosphorus Atrazine System Quality Soil Phosphors Model Water quality Management Groundwater Transport Losses Erosion Dynamics Sediment Phosphorus NPS pollution Transport Water Model Soil Land use Sediment Losses Nitrate Escherichia-coli Water quality Model Land use Transport Soil NPS pollution Water Sediment Contamination Catchment Flow NPS pollution Quality Land use Model Soil Water Sediment Catchment River Transport China Nitrogen Quality Phosphorus Model Land use Soil Water River River basin Sediment Impact
Topic words cluster distribution in 1990-1994
Topic words cluster distribution in 1995-1999
Topic words cluster distribution in 2000-2004
Topic words cluster distribution in 2005-2009
Topic words cluster distribution in 2010-2014
Topic words cluster distribution in 2015-2017
Leading agency--- with citation
Leading agency- with paper numbers
High cited authors
SWAT-N 2 O Coupler Tool: An integration tool for soil N 2 O emission modeling Methodological development Soil N 2 O emission model at the global scale Soil N 2 O emission model at the landscape or watershed scale Wagena et al., 2017, EMS Yang et al., 2017 SWAT-GHG, SWAT coupled with Daycent Simple algorithm,exists uncertainty. but still can capture soil N 2 O emission Based-meta analysis model Zhou et al, 2015, EST Shcherbak et al., 2014 CASA, CENTURY, Daycent, DNDC, LandscapeDNDC Complicated algorithm, need a lot of observed data Based-meta analysis model SWAT An alternative way for simulating soil N 2 O emission IPCC coefficient method HIP concept model
Operational structure of the SWAT-N 2 O Coupler Toolboxes SWAT-N2O coupler SWAT project Soil temperature and moisture validation SWAT soil parameters output (soil temp, moisture and soil NO3) Executing N 2 O non-paddy and N 2 O paddy models Output N 2 O emission Plot N 2 O flux on daily, monthly, quarterly and yearly for specific HRU For plotting spatial distribution of N 2 O flux Packaging in ARCGIS using Python
SWAT-N 2 O Coupler Tools interface
Case study: validation for soil temperature, moisture simulated by SWAT SMAP datasets Soil temperature and moisture(9*9 km)
Paddy field eco-hydrological modification
National NPS manageme nt tool
Combined with watershed geographic data
各流域图层图例 Watershed geographic data survey and navigation
Temporal-spatial NPS pattern survey of each sub-basins
Temporal-spatial NPS pattern export of each sub-basins
Thanks for your attentions