Article Ecosystem Organic Carbon Stock Estimations in the River, North Eastern

Alessandro Buosi *, Yari Tomio, Abdul-Salam Juhmani and Adriano Sfriso

Department of Environmental Sciences, Informatics and Statistics (DAIS), Ca’ Foscari University of , Via Torino 155, 30170, Venice, Italy; [email protected] (Y.T.); [email protected] (A.-S.J.); [email protected] (A.S.) * Correspondence: [email protected]; Tel.: +39-041 234 8621

Table S1. Water and sediment environmental parameters .

Storga Morgano Summer Winter Summer Winter Summer Winter N-NH4 (µM) 0.95 1.58 1.12 1.54 1.68 1.82 N-NO3 (µM) 75.9 79.2 64.8 70.0 60.2 60.2 N-NO2 (µM) 0.19 0.48 0.42 0.27 0.70 0.41 DIN (µM) 77.1 81.3 67.4 71.8 62.6 64.5 P-PO4 (µM) 1.01 0.93 1.24 0.93 0.32 0.31 Water DO (mg/l) 14.5 11.9 10.1 13.3 10.3 13.7 DO (% ) 110 128 110 119 86 121 pH 7.90 7.80 7.9 7.7 7.6 7.7 TSS (mg/l) 5.60 4.10 8.00 11.30 24.20 7.20 Chl-a (µg/l) 1.91 1.77 2.67 2.14 1.12 0.95 pH 7.3 7.2 7.1 7.1 7.4 7.3 Sediment Eh (mV) 228.0 212.0 226.0 220.0 86.2 82.3 * N-NH4: ammonium, N-NO3: Nitrate; N-NO2: Nitrite, DIN: dissolved inorganic nitrogen, P-PO4: Citation: Buosi, A.; Tomio, Y.; Juh- reactive phosphorus, DO: dissolved oxygen, TSS: total suspended sediment, Chl-a: Chlorophyll- mani, A.-S.; Sfriso A. Ecosystem Or- a. ganic Carbon Stock Estimations in the Sile River, North Eastern Italy. Water 2020, 13, 77. https://doi.org/10.3390/w13010077

Received: 30 November 2020 Accepted: 28 December 2020 Published: 31 December 2020

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Table S2. Sediment grain size distribution with depth (% of Fines).

Storga Morgano Treviso Summer Winter Summer Winter Summer Winter 0–5 cm 82.1 83.1 58.7 55.7 68.5 67.2 5–15 cm 82.3 82.7 20.7 22.0 52.6 60.1 15–25 cm 90.5 89.1 22.0 21.9 76.2 77.2 25–35 cm 94.7 94.0 77.1 79.2 72.9 72.8 Mean 87.4 87.2 44.6 44.7 67.6 69.3

Table S3: Sediment total nitrogen (TN) concentrations with depth (Mg TN ha−1).

Storga Morgano Treviso Summer Winter Summer Winter Summer Winter 0-5 cm 0.73 0.81 0.57 0.46 0.98 0.54 5-15 cm 1.74 1.78 1.45 1.13 1.56 1.29 15-25 cm 1.54 1.48 1.75 1.22 1.62 1.10 25-35 cm 1.87 1.34 1.98 2.21 1.67 1.25 Total 5.87 5.41 5.75 5.02 5.83 4.18 Mean 1.47 1.35 1.44 1.26 1.46 1.05