Title: Transports of Organic Carbon and Nutrients in the Kaoping River-Sea System
1Transports of Organic Carbon and Nutrients in the
Kaoping River-Sea System
- J.-J. Hung, H.-M. Yang, E.-T. Yeh, Y.-C. Yeh,
C.-M. Ho and I..-J. Lai Institute of Marine
Geology and Chemistry, National Sun Yat-Sen
UniversityKaohsiung, Taiwan E-mail
hungjj_at_mail.nsysu.edu.tw
2Outlines
- Riverine fluxes of suspended sediment, and
dissolved and particulate carbon, nitrogen and
phosphorus - Meterological conditions vs. riverine fluxes
- Transformation of riverine CNP in the Kaoping
Estuary (net fluxes) - Coastal CNP budgets (on-going studies)
3Kaoping River
Dadson et al., 2003
4Historical
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- Sampling period
- Aug/1999-July/2000 (1998-2000 La Nina event)
- 2002 (2002-04 El Nino event)
1999
2000
5Sampling locations in the Kaoping River
6Sampling locations and their elevations and
discharge contributions
7Sediment Yield (Kaoping watershed)
- 1999/2000 3.6103 g/m2/yr
- 2002 0.656103 g/m2/yr
- Worlds rivers (mean) 150 g/m2/yr
- Islands rivers (mean) 3103 g/m2/yr
- derived from suspended load only
8Particle size vs. river discharge (water
elevation)
Krosa Typhoon
Pabuk Typhoon
Wutip Typhoon
Sepat Typhoon
Wet season
Dry season
9Particulate organic carbon (POC)
Particulate inorganic nitrogen (PON)
10Particulate organic phosphorus (POP)
Particulate inorganic phosphorus (PIP)
11Chemical Yield (Ca, Mg, K, Na, Cl, SO4, HCO3, Si)
- 1999/2000 1.14103 g/m2/yr
- 2002 0.416103 g/m2/yr
- Worlds rivers (ave) 3340 g/m2/yr
12Transport of C and N in the Kaoping River
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14Kaoping River
Industrial wastewater
Others
Animal wasterwater
Domestic
15Foot and Mouth Disease
16Nitrogen Fluxes (Anthropogenic contributions)
- Estimated from wastewater discharge 5.6104
kg/day - Estimated from difference between baseline and
in-situ measurements 6.5104 kg/day (Particulate
nitrogen 4.8 103 kg/day) - EPA(ROC) report 5.7 104 kg/day
- Anthropogenic contributions to total fluxes 89
(64715/7297789)
17Phosphorus Fluxes (Anthropogenic contributions)
- Estimated from wastewater discharge 4.7 103
kg/day - Estimated from the difference between baseline
and in-situ measurements 7.4 103
kg/day(Particulate P 4.4 103 kg/day) - EPA(ROC) report 1.3 104 kg/day
- Anthropogenic contributions to total fluxes 61
(7399/1212461)
18 Carbon and nutrient yields from the
Kaoping Watershed
08/1999-07/2000 (a) 2002 (b) a/b
Discharge (cms) 270 102 2.6
POC (g/m2/yr) 44.9 2.92 15.4
PIC (g/m2/yr) 18.4 1.27 14.5
DOC (g/m2/yr) 2.27 1.8 1.3
DIC (g/m2/yr) 111 47.7 2.3
PN (g/m2/yr) 0.70 0.47 1.5
DIN (mol/m2/yr) 0.59 0.13 4.5
DIP (mmol/m2/yr) 6.29 5.43 1.2
DSi (mol/m2/yr) 0.41 0.31 1.3
19Meterological conditions primarily determine the
material fluxes and proportions of natural and
anthropogenic contributions
20 21DO
Dec./2003
22Salinity
Salinity
July, 2003
23- Dissolved inorganic nutrients (except for
DIP-addition in high S range) and DOC were
transported conservatively through the estuary
during the wet season. - Nitrate reduction/denitrification occurred in the
low S range during the dry season - Non-conservative transports - for particulate
phases of carbon and nutrients - Using Biogeochemical (box) model to derive net
fluxes
24Dissolved CNP Budgets
25Particulate CNP Budgets
26Carbon, Nitrogen and Phosphorus Budgets
Net fluxes
- Coastal Zone
- ? Primary production
- ? Recycling
- Kaoping Estuary
- ? Addition
- ? Removal
River
Kaoping Watershed
Dissolved Particulater matter
DissolvedRelease
Settling
Denitrification
Sediments ? Recycled
? Preserved
On-going studies
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