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Fig. 1. Fluxes of N2ON (mg m2 d1) (mean and standard error of the mean [SE]) from various sections within each examined constructed wetland. (a) and (b) Free surface water (FSW) wetlands; (c) and (d) overland and groundwater flow (OGF) wetlands; (e) and (f) horizontal subsurface flow (HSSF) wetlands; (g) and (h) vertical subsurface flow (VSSF) wetlands for the summer and winter seasons, respectively.
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