Fig. 1: Hydrological and nutrient concentrations in the Wax Lake Delta. | Communications Earth & Environment

Fig. 1: Hydrological and nutrient concentrations in the Wax Lake Delta.

From: Isotopic evidence for preferential transport of fertilizer nitrogen into the northern Gulf of Mexico during high water discharge

Fig. 1

a Map of the study area in the Wax Lake Delta (WLD), Louisiana, USA. The blue symbols indicate the water and particle isotope sampling locations in the wet season, while the red symbols indicate the dry season. b Daily water discharge in 2021 (m3 s−1), with the arrows indicating the sampling time for this study. c Monthly dissolved inorganic nitrogen (NO3−, NH4+, NO2−) in the Wax Lake Delta. Note that NH4+ concentrations are consistently lower than 1 μM throughout the year, indicating quantitative nitrification in the WLD watershed. Daily water discharge and nutrient data were obtained from U.S. Geological Survey (USGS). The locations can be found in Supplementary Fig. 1.

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