Unusual Roles of Discharge, Slope and SOC in DOC Transport in Small Mountainous Rivers, Taiwan.

ABSTRACT: 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 ~0.78 mg L-1 is much lower than the global average of ~5.29 mg L-1. However, the mean DOC yield, ~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

SUBMITTER: Lee LC 

PROVIDER: S-EPMC6367504 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature