Nitrogen Transport Estimates in the San Antonio River Basin

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Presentation transcript:

Nitrogen Transport Estimates in the San Antonio River Basin Term Project for GIS in Water Resources Seungwon Chung 2016-11-22 Source: https://www.lakeforest.edu, UNEP (2014)

How Does Landscape Nitrogen Dynamics Affect Coastal Water Quality?

Nitrogen Transport Modeling Objectives Nitrogen Transport Modeling 1. Investigate anthropogenic nitrogen input data 2. Simulate nitrogen transport under the impacts of terrestrial nitrogen inputs, dynamics and transports 3. Understand the relationship between nitrogen inputs, transports and processes

Processing Steps

Study Region

Land Cover in the San Antonio River Basin

Net Anthropogenic Nitrogen Inputs (NANI) - Generate input data (feature)

Grid-based Land Surface Model: Noah-MP-CN Net Anthropogenic Nitrogen Inputs (NANI) - Convert to land surface model input file (raster) Grid-based Land Surface Model: Noah-MP-CN NO3- Runoff Atmospheric Forcing Energy, water, carbon and Nitrogen cycles Wrfinput/geo_em Mineralization Decomposition Immobilization Nitrification Volatilization Atmospheric deposition Denitrification Fertilizer application Leaching Uptake Fixation Leaf N retranslocation

Land Surface Model and River Routing Model - Simulate NO3-, Runoff, Streamflow

Future Work Nutrient Transport Stored or lagged from previous day NO3- in mobile water Runoff COMID, Catchment area, River connectivity Flow wave celerity/diffusion USGS gage stations Runoff to Streamflow Muskingum method NO3- concentration (mg/L) Discharge (cfs) NO3- transports Streamflow River Routing Model: RAPID Nutrient Transport Stored or lagged from previous day In stream nutrient process Oxidation Uptake by algae (Originally from SWAT)

Thank you for your attention Any question?