Table 2. CH₄ Fluxes from the Different Sides of the Sludge Deposit and Total Flux from Mass Balance^a.

component	flux (kg CH4 d–1)
east side	+196.2 ± 6.0
north side	–11.5 ± 0.7
west side	–50.3 ± 0.9
south side	+44.0 ± 5.3
total CH4 flux	178.4 ± 8.1

^aPlus and minus signs indicate the net fluxes out from and into the area, respectively.