Journal
SCIENTIFIC REPORTS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-018-38276-x
Keywords
-
Categories
Funding
- Taiwan Ministry of Science and Technology [MOST 107-2621-B-002-003-MY3, MOST 106-2116-M-002-020, MOST 105-2116-M-003-006]
- Austrian Science Fund [FWF I 1396-B16]
- NTU Research Center for Future Earth [107L901004]
- Austrian Science Fund (FWF) [I1396] Funding Source: Austrian Science Fund (FWF)
Ask authors/readers for more resources
Riverine dissolved organic carbon (DOC), responsible for riverine productivity, is rarely documented in subtropical small mountainous rivers (SMRs) where high rainfall and steep slopes are the main features. This study investigated the DOC export at eight sites in three Taiwan SMRs to characterize the dynamics and controlling factors of DOC transport. Results showed that the mean DOC concentration of similar to 0.78 mg L-1 is much lower than the global average of similar to 5.29 mg L-1. However, the mean DOC yield, similar to 22.51 kg-C ha(-1) yr(-1), is higher than the global average of 14.4-19.3 kg-C ha(-1) yr(-1). Comparing with worldwide rivers from literature, the annual discharge, slope, and SOC (soil organic carbon) are controlling factors as expected, though they influence in different ways. SOC stock likely regulated by elevation-dependent biomes dominate the DOC supply, while slope restrains the DOC generation due to shallow soil depth and fast runoff velocity. However, the abundant discharge flushing this persistent low supply leads to a large DOC export in the SMRs. Furthermore, the DOC dynamics during typhoon periods showed a clockwise hysteresis, suggesting that the DOC is mainly from the riparian zone or downslope area during the rising limb of the hydrograph. This study elucidates the DOC transport in SMRs and provides an atypical yet significant piece of understanding on DOC transport in a global context.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available