total nitrogen input, output, and land cover in the mission and aransas watersheds hengchen wei...
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![Page 1: Total Nitrogen Input, Output, and Land Cover in the Mission and Aransas Watersheds Hengchen Wei Department of Marine Science](https://reader035.vdocuments.site/reader035/viewer/2022081520/5697c0241a28abf838cd492e/html5/thumbnails/1.jpg)
Total Nitrogen Input, Output, and Land Cover in the Mission and Aransas Watersheds
Hengchen WeiDepartment of Marine Science
![Page 2: Total Nitrogen Input, Output, and Land Cover in the Mission and Aransas Watersheds Hengchen Wei Department of Marine Science](https://reader035.vdocuments.site/reader035/viewer/2022081520/5697c0241a28abf838cd492e/html5/thumbnails/2.jpg)
Watershed Inputs (?)
River Outputs (?)
(?)
(modified from Philips and others, 1999)
![Page 3: Total Nitrogen Input, Output, and Land Cover in the Mission and Aransas Watersheds Hengchen Wei Department of Marine Science](https://reader035.vdocuments.site/reader035/viewer/2022081520/5697c0241a28abf838cd492e/html5/thumbnails/3.jpg)
![Page 4: Total Nitrogen Input, Output, and Land Cover in the Mission and Aransas Watersheds Hengchen Wei Department of Marine Science](https://reader035.vdocuments.site/reader035/viewer/2022081520/5697c0241a28abf838cd492e/html5/thumbnails/4.jpg)
![Page 5: Total Nitrogen Input, Output, and Land Cover in the Mission and Aransas Watersheds Hengchen Wei Department of Marine Science](https://reader035.vdocuments.site/reader035/viewer/2022081520/5697c0241a28abf838cd492e/html5/thumbnails/5.jpg)
Agriculture63%
Development6%
Forest3%
OpenWater0%
Shrub-ScrubGrass
24%
SnowIceBarren0%
Wetland3%
2006 Aransas
Agriculture37%
Development4%
Forest7%
OpenWater1%
Shrub-ScrubGrass
47%
SnowIceBarren0%
Wetland4%
2006 Mission
Land cover data (NLCD 2006)
![Page 6: Total Nitrogen Input, Output, and Land Cover in the Mission and Aransas Watersheds Hengchen Wei Department of Marine Science](https://reader035.vdocuments.site/reader035/viewer/2022081520/5697c0241a28abf838cd492e/html5/thumbnails/6.jpg)
Land Cover Change From 1992 to 2006
Agricu
lture
Develo
pment
Fores
t
OpenW
ater
Shru
bScrubGras
s
SnowIce
Barren
Wetl
and
0.00
200.00
400.00
600.00
800.00
1000.00
1200.00
1400.00
1600.00
1800.00
2000.00
Aransas
1992 Area (km2)2001 Area (km2)2006 Area (km2)
Agricu
lture
Develo
pment
Fores
t
OpenW
ater
Shru
bScrubGras
s
SnowIce
Barren
Wetl
and
0.00
200.00
400.00
600.00
800.00
1000.00
1200.00
1400.00
1600.00
1800.00
Mission
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Mission Aransas
Annual Export (kg/yr) % Export during storms
Annual Export (kg/yr)
% Export during storms
2007 2008 2007 2008 2007 2008 2007 2008
Nitrate 32547 262 96 5 67324 22376 66 23
Ammonium 12242 142 94 4 5492 773 90 73
DON 195815 1742 97 8 54600 5388 95 76
PON 91286 1057 95 3 77496 4786 97 84
TN 331890 3203 204912 33323
Discharge (m3/yr) 30*10^7 0.6*10^7 8*10^7 1*10^7
Table 1. Annual TN riverine export from LoadRunner/LOADEST. Modified from (Mooney and McClelland, 2012 )
![Page 8: Total Nitrogen Input, Output, and Land Cover in the Mission and Aransas Watersheds Hengchen Wei Department of Marine Science](https://reader035.vdocuments.site/reader035/viewer/2022081520/5697c0241a28abf838cd492e/html5/thumbnails/8.jpg)
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.