Table 2. Total diffusive CO₂ and CH₄ flux in Terengganu River and the estimated contributions from specific anthropogenic activities.

Sampling period	CO2 (mmol m−2 d−1 ) median ± std	Total river emission (Mmol d−1 )	Contribution (%)
			Dam discharge	Sand extraction	Other
Mar-18	7.5 ± 7.1	0.08	8	49	43
Apr-18	26 ± 42	0.43	10	71	18
Apr-19	37 ± 14	0.40	24	32	45
		Average contribution (%)	14	51	35
	CH4 (mmol m−2 d−1)
Mar-18	0.5 ± 3.0	0.01	55	38	7
Apr-18	1.0 ± 5.7	0.03	16	79	5
Apr-19	0.3 ± 0.4	0.003	18	47	35
		Average contribution (%)	30	55	15