Total Nitrogen Input, Output, and Land Cover in the Mission and Aransas Watersheds Hengchen Wei Department of Marine Science.

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Presentation transcript:

Total Nitrogen Input, Output, and Land Cover in the Mission and Aransas Watersheds Hengchen Wei Department of Marine Science

Watershed Inputs (?) River Outputs (?) (?) (modified from Philips and others, 1999)

Land cover data (NLCD 2006)

Land Cover Change From 1992 to 2006

MissionAransas Annual Export (kg/yr) % Export during storms Annual Export (kg/yr) % Export during storms Nitrate Ammonium DON PON TN Discharge (m3/yr) 30*10^70.6*10^78*10^71*10^7 Table 1. Annual TN riverine export from LoadRunner/LOADEST. Modified from (Mooney and McClelland, 2012 )

Future Work Obtain and use ArcGIS to compile the TN input data for the Mission and Aransas watersheds. TX-ANB dataset (Mayer, 2012) Compare the TN input with riverine output and land cover.