/* DATA DESCRIPTION: Citation: Schreckinger, José; Koschorreck, Matthias; Marcon-Henge, Lediane; Brauns, Mario; Rudolph, Simon; Osorio-Pelaez, Catalina; Meador, Travis B; Mendoza-Lera, Clara: CO₂, CH₄, and N₂O fluxes and porewater concentrations, δ¹⁵N-N₂ dynamics, and nutrient (NO₃⁻, NH₄⁺, PO₄³⁻) release and uptake rates throughout the experiment [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.988281 (dataset in review), In: Schreckinger, J et al.: Flume experiment data on O₂, CO₂, CH₄, N₂O, δ¹⁵N-N₂, and sediment nutrient dynamics under six flow velocities and two flow-resumption modes using dried Queich River sediment (Germany) [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.987877 (dataset in review) Abstract: This dataset supports the publication "Dry-to-flow mode: impacts on river carbon and nitrogen dynamics". In where we investigated how instant and gradual surface flow resumption (the latter preceded by 6 h inundation), combined with six flow velocities and five levels of sediment transport, affect streambed biogeochemistry in the Queich River (Germany). Over 24 h, we measured CO₂, CH₄, and N₂O fluxes, porewater gas concentrations, and dissolved oxygen dynamics. Additionally, we applied a ¹⁵N-NO₃ tracer to track denitrification via changes in δ¹⁵N-N₂, and determined NO₃⁻ and NH₄⁺ release and uptake rates. The repository also includes videos documenting sediment transport conditions at flow velocities of 0.15, 0.17, 0.18, and 0.21 m s⁻¹. Keyword(s): Experiment Funding: German Research Foundation (DFG) (URI: http://www.dfg.de/en/), grant/award no. 455048778: FlowReSet (ME5498/2-1) (URI: https://gepris.dfg.de/gepris/projekt/455048778) Parameter(s): Experimental run (Exp run) * PI: Schreckinger, José (schrejos@b-tu.de) Method comment (Method comm) * PI: Schreckinger, José (schrejos@b-tu.de) * COMMENT: Dry-to-flow mode Flow velocity, experimental [m/s] (Vel exp) * PI: Schreckinger, José (schrejos@b-tu.de) Sediment transport [kg/m/s] (Sed transport) * PI: Schreckinger, José (schrejos@b-tu.de) Period (Period) * PI: Schreckinger, José (schrejos@b-tu.de) Methane, flux [µmol/m**2/day] (CH4 flux) * PI: Schreckinger, José (schrejos@b-tu.de) * METHOD/DEVICE: Gas analyzer, Los Gatos Research and Gas chromatograph, SRI Instruments USA, SRI8610 Carbon dioxide, flux [mmol/m**2/day] (CO2 flux) * PI: Schreckinger, José (schrejos@b-tu.de) * METHOD/DEVICE: Gas analyzer, Los Gatos Research and Gas chromatograph, SRI Instruments USA, SRI8610 Ammonium, flux [µg/m**2/h] ([NH4]+ flux) * PI: Schreckinger, José (schrejos@b-tu.de) * METHOD/DEVICE: Flow analyzers, SEAL Analytical, AutoAnalyzer 3 and Bran+Luebbe, CFA Autoanalyzer Nitrate, flux [µg/m**2/h] ([NO3]- flux) * PI: Schreckinger, José (schrejos@b-tu.de) * METHOD/DEVICE: Flow analyzers, SEAL Analytical, AutoAnalyzer 3 and Bran+Luebbe, CFA Autoanalyzer Nitrous oxide, flux [µmol/m**2/day] (N2O flux) * PI: Schreckinger, José (schrejos@b-tu.de) * METHOD/DEVICE: Gas analyzer, Los Gatos Research and Gas chromatograph, SRI Instruments USA, SRI8610 Phosphate, flux [µg/m**2/h] ([PO4]3- flux) * PI: Schreckinger, José (schrejos@b-tu.de) * METHOD/DEVICE: Flow analyzers, SEAL Analytical, AutoAnalyzer 3 and Bran+Luebbe, CFA Autoanalyzer δ15N, gas, fractional (δ15N N2 fract) * PI: Schreckinger, José (schrejos@b-tu.de) * METHOD/DEVICE: Isotope Ratio Mass Spectrometer (IRMS), Thermo Scientific * COMMENT: change in d15N-N2, unitless Methane, porewater [µmol/l] (CH4 pw) * PI: Schreckinger, José (schrejos@b-tu.de) * METHOD/DEVICE: Gas analyzer, Los Gatos Research and Gas chromatograph, SRI Instruments USA, SRI8610 Carbon dioxide, porewater [µmol/l] (CO2 pw) * PI: Schreckinger, José (schrejos@b-tu.de) * METHOD/DEVICE: Gas analyzer, Los Gatos Research and Gas chromatograph, SRI Instruments USA, SRI8610 Nitrous oxide, porewater [µmol/l] (N2O pw) * PI: Schreckinger, José (schrejos@b-tu.de) * METHOD/DEVICE: Gas analyzer, Los Gatos Research and Gas chromatograph, SRI Instruments USA, SRI8610 License: Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/) (License comes into effect after moratorium ends) Size: 1038 data points */ Exp run Method comm Vel exp [m/s] Sed transport [kg/m/s] Period CH4 flux [µmol/m**2/day] CO2 flux [mmol/m**2/day] [NH4]+ flux [µg/m**2/h] [NO3]- flux [µg/m**2/h] N2O flux [µmol/m**2/day] [PO4]3- flux [µg/m**2/h] δ15N N2 fract CH4 pw [µmol/l] CO2 pw [µmol/l] N2O pw [µmol/l] 1 Instant 0.127846154 0.000000000 0-12 h 2.120452222 10.78085895 1 Instant 0.127846154 0.000000000 12-24 h 1.630173580 20.04871538 1 Instant 0.127846154 0.000000000 0-24 h 1.875312901 15.41478717 -0.552188552 0.505471380 32.405329450 -0.319865320 2.585254951 0.038578776 128.77366260 0.676960775 1 Instant 0.140846154 0.000000000 0-12 h 1.426016414 18.22321254 1 Instant 0.140846154 0.000000000 12-24 h 1.103298403 28.20016427 1 Instant 0.140846154 0.000000000 0-24 h 1.264657408 23.21168840 -0.552188552 0.973063973 19.981751800 -0.261363636 2.880685241 0.051358865 136.91620100 0.117048535 1 Instant 0.153133333 0.000684346 0-12 h 2.077045336 19.83938157 1 Instant 0.153133333 0.000684346 12-24 h 1.641870299 28.73825308 1 Instant 0.153133333 0.000684346 0-24 h 1.859457817 24.28881732 -0.552188552 0.751683502 13.048082620 -0.259259259 3.447328414 0.071140546 87.35475923 0.048228671 1 Instant 0.169230769 0.001087393 0-12 h 0.832525008 20.77912578 1 Instant 0.169230769 0.001087393 12-24 h 1.224577552 34.03763659 1 Instant 0.169230769 0.001087393 0-24 h 1.028551280 27.40838119 -0.552188552 1.192340067 17.525374260 -0.228535354 2.394561366 0.095144486 39.74033619 0.033961342 1 Instant 0.184076923 0.004459900 0-12 h 0.207366331 23.77564988 1 Instant 0.184076923 0.004459900 12-24 h 0.659954102 39.54555226 1 Instant 0.184076923 0.004459900 0-24 h 0.433660216 31.66060107 -0.552188552 1.614478114 14.473736940 -0.227272727 1.962950633 0.072943939 56.67182121 0.032093218 1 Instant 0.206230769 0.011876490 0-12 h 0.467825670 22.95763539 1 Instant 0.206230769 0.011876490 12-24 h 0.575391641 44.49037040 1 Instant 0.206230769 0.011876490 0-24 h 0.521608655 33.72400290 -0.552188552 1.217171717 9.304154287 -0.215488215 2.055994979 0.057460749 103.88415970 0.029708947 2 Instant 0.127846154 0.000000000 0-12 h -0.033926526 13.64655212 2 Instant 0.127846154 0.000000000 12-24 h 1.515217299 56.33773570 2 Instant 0.127846154 0.000000000 0-24 h 0.740645387 34.99214391 -0.549242424 1.220538721 19.183745600 -0.404040404 1.172759008 0.020000000 158.99637020 1.171168360 2 Instant 0.140846154 0.000000000 0-12 h 0.501686376 27.87635700 2 Instant 0.140846154 0.000000000 12-24 h 1.102514291 61.94283437 2 Instant 0.140846154 0.000000000 0-24 h 0.802100334 44.90959568 -0.549242424 1.907407407 14.915472720 -0.370791246 1.635387822 0.067885260 113.08717150 0.085424049 2 Instant 0.153133333 0.000684346 0-12 h 0.880552113 28.27346277 2 Instant 0.153133333 0.000684346 12-24 h 1.846887017 57.29473558 2 Instant 0.153133333 0.000684346 0-24 h 1.363719565 42.78409918 -0.549242424 1.913720539 16.859273970 -0.356060606 1.878046703 0.044403108 107.43758630 0.048598673 2 Instant 0.169230769 0.001087393 0-12 h 0.229004484 30.50763421 2 Instant 0.169230769 0.001087393 12-24 h 1.591462745 60.75337237 2 Instant 0.169230769 0.001087393 0-24 h 0.910233614 45.63050329 -0.549242424 1.643097643 9.120472366 -0.327861953 1.782917393 0.044504750 107.64431400 0.029394228 2 Instant 0.184076923 0.004459900 0-12 h 0.393423402 21.38831711 2 Instant 0.184076923 0.004459900 12-24 h 1.137779987 60.45860585 2 Instant 0.184076923 0.004459900 0-24 h 0.765601694 40.92346148 -0.549242424 2.057659933 9.668888320 -0.311868687 1.798754607 2 Instant 0.206230769 0.011876490 0-12 h 1.359207552 23.78540604 2 Instant 0.206230769 0.011876490 12-24 h 1.313003045 56.67837946 2 Instant 0.206230769 0.011876490 0-24 h 1.336105298 40.23189275 -0.549242424 2.203282828 5.578813893 -0.305555556 1.707439194 0.016276853 114.59164660 0.023370086 3 Instant 0.127846154 0.000000000 0-12 h 2.701332098 23.40010559 3 Instant 0.127846154 0.000000000 12-24 h 2.034680210 58.60968515 3 Instant 0.127846154 0.000000000 0-24 h 2.368006154 41.00489537 -0.537878788 0.413720539 10.021532880 -0.370791246 2.473539664 0.022148081 109.17468660 0.036083110 3 Instant 0.140846154 0.000000000 0-12 h 1.948214922 35.26993829 3 Instant 0.140846154 0.000000000 12-24 h 1.926450972 53.81747079 3 Instant 0.140846154 0.000000000 0-24 h 1.937332947 44.54370454 -0.537878788 0.941498316 7.994606709 -0.312710438 2.442248398 0.047412884 120.37365480 0.038821025 3 Instant 0.153133333 0.000684346 0-12 h 2.125481139 35.30704967 3 Instant 0.153133333 0.000684346 12-24 h 3.223039086 51.12951145 3 Instant 0.153133333 0.000684346 0-24 h 2.674260112 43.21828056 -0.537878788 1.355639731 8.275603332 -0.283249158 2.038715490 0.019742849 122.70488900 0.032118437 3 Instant 0.169230769 0.001087393 0-12 h 1.766359587 45.12858297 3 Instant 0.169230769 0.001087393 12-24 h 2.701418999 54.26344846 3 Instant 0.169230769 0.001087393 0-24 h 2.233889293 49.69601571 -0.537878788 0.824915825 6.499785094 -0.313552189 2.202896703 0.020556617 116.54503440 0.023097498 3 Instant 0.184076923 0.004459900 0-12 h 0.733085888 30.43207676 3 Instant 0.184076923 0.004459900 12-24 h 1.884511009 57.07657814 3 Instant 0.184076923 0.004459900 0-24 h 1.308798449 43.75432745 -0.537878788 1.154461279 7.112961926 -0.288720539 1.741622546 0.015496081 137.29296500 0.021442802 3 Instant 0.206230769 0.011876490 0-12 h 1.342450675 33.31778933 3 Instant 0.206230769 0.011876490 12-24 h 2.467994128 56.64673343 3 Instant 0.206230769 0.011876490 0-24 h 1.905222402 44.98226138 -0.537878788 1.465488215 0.557293784 -0.277356902 0.016944950 146.90516120 0.019633400 4 Gradual 0.127846154 0.000000000 0-12 h 2.037214189 48.45877300 4 Gradual 0.127846154 0.000000000 12-24 h 2.179445281 34.95731986 4 Gradual 0.127846154 0.000000000 0-24 h 2.108329735 41.70804643 -0.441919192 2.573232323 23.448739460 -0.268097643 3.478340301 0.071552417 182.59938030 0.045199710 4 Gradual 0.140846154 0.000000000 0-12 h 0.373505940 59.34813991 4 Gradual 0.140846154 0.000000000 12-24 h 2.098454574 30.59954095 4 Gradual 0.140846154 0.000000000 0-24 h 1.235980257 44.97384043 -0.510101010 2.699494949 9.050718388 -0.239057239 3.526480545 0.045325308 77.16585335 0.040706523 4 Gradual 0.153133333 0.000684346 0-12 h 1.930899625 57.61942112 4 Gradual 0.153133333 0.000684346 12-24 h 2.644303626 28.41662008 4 Gradual 0.153133333 0.000684346 0-24 h 2.287601626 43.01802060 -0.564393939 3.153198653 9.161856325 -0.240319865 3.430391005 0.054164722 70.93634031 0.034860598 4 Gradual 0.169230769 0.001087393 0-12 h 1.557146002 63.99469503 4 Gradual 0.169230769 0.001087393 12-24 h 2.361394359 28.41114856 4 Gradual 0.169230769 0.001087393 0-24 h 1.959270180 46.20292179 -0.564393939 3.231481481 4.972344109 -0.239057239 3.690181300 0.070330173 108.24366040 0.032736292 4 Gradual 0.184076923 0.004459900 0-12 h 1.121881540 56.22629601 4 Gradual 0.184076923 0.004459900 12-24 h 1.896078788 30.04383047 4 Gradual 0.184076923 0.004459900 0-24 h 1.508980164 43.13506324 -0.564393939 3.651936027 9.524289885 -0.254629630 3.449780973 0.068411504 83.94527320 0.025802650 4 Gradual 0.206230769 0.011876490 0-12 h 1.299400500 55.93378797 4 Gradual 0.206230769 0.011876490 12-24 h 2.196859966 26.20184316 4 Gradual 0.206230769 0.011876490 0-24 h 1.748130233 41.06781557 -0.564393939 3.549663300 7.437913861 -0.222222222 2.671690316 0.069089468 80.04401336 0.025084380 5 Gradual 0.127846154 0.000000000 0-12 h 1.028292916 62.55034054 5 Gradual 0.127846154 0.000000000 12-24 h 2.102497855 25.14479505 5 Gradual 0.127846154 0.000000000 0-24 h 1.565395385 43.84756780 -0.474747475 2.497053872 38.246675850 -0.164983165 3.119490670 0.058414142 115.97919290 1.285977776 5 Gradual 0.140846154 0.000000000 0-12 h 0.867572592 70.55397456 5 Gradual 0.140846154 0.000000000 12-24 h 1.764869860 20.22833037 5 Gradual 0.140846154 0.000000000 0-24 h 1.316221226 45.39115246 -0.474747475 3.144360269 38.032269640 -0.108585859 3.653793844 0.021153310 110.98982690 0.087188043 5 Gradual 0.153133333 0.000684346 0-12 h 2.042456369 64.71448875 5 Gradual 0.153133333 0.000684346 12-24 h 1.904179577 18.73891702 5 Gradual 0.153133333 0.000684346 0-24 h 1.973317973 41.72670288 -0.474747475 3.575336700 29.647731480 -0.109427609 0.017634902 119.73564920 0.054666885 5 Gradual 0.169230769 0.001087393 0-12 h 0.415412480 75.46196391 5 Gradual 0.169230769 0.001087393 12-24 h 1.900500573 16.71570246 5 Gradual 0.169230769 0.001087393 0-24 h 1.157956527 46.08883318 -0.474747475 3.160353535 23.037120970 -0.101851852 3.765867514 0.020883610 142.47138140 0.062553499 5 Gradual 0.184076923 0.004459900 0-12 h 0.953777368 66.89265575 5 Gradual 0.184076923 0.004459900 12-24 h 1.178887296 24.88077803 5 Gradual 0.184076923 0.004459900 0-24 h 1.066332332 45.88671689 -0.474747475 3.041666667 21.075823150 -0.122474747 3.244778562 0.020094456 166.94440680 0.043674201 5 Gradual 0.206230769 0.011876490 0-12 h 0.837101725 63.63586921 5 Gradual 0.206230769 0.011876490 12-24 h 1.207015364 21.17673527 5 Gradual 0.206230769 0.011876490 0-24 h 1.022058544 42.40630224 -0.474747475 3.803451178 26.017824350 -0.117845118 2.446192079 0.018344695 153.33573950 0.047441413 6 Gradual 0.127846154 0.000000000 0-12 h 0.443660297 73.62875262 6 Gradual 0.127846154 0.000000000 12-24 h 2.004102421 26.16735548 6 Gradual 0.127846154 0.000000000 0-24 h 1.223881359 49.89805405 -0.551346801 1.854797980 11.792077970 -0.237373737 2.504776995 0.029752731 130.70927470 1.181411257 6 Gradual 0.140846154 0.000000000 0-12 h 0.447107398 80.73723811 6 Gradual 0.140846154 0.000000000 12-24 h 1.781896892 23.02687170 6 Gradual 0.140846154 0.000000000 0-24 h 1.114502145 51.88205490 -0.486111111 1.409090909 9.854546766 -0.208754209 2.731021699 0.023164496 138.66043570 0.052171839 6 Gradual 0.153133333 0.000684346 0-12 h 2.511023813 77.32543846 6 Gradual 0.153133333 0.000684346 12-24 h 2.617571920 21.73060596 6 Gradual 0.153133333 0.000684346 0-24 h 2.564297866 49.52802221 -0.471380471 2.107323232 5.456519502 -0.186026936 3.421057048 0.026167694 126.31921500 0.074892460 6 Gradual 0.169230769 0.001087393 0-12 h 0.962145475 83.23300152 6 Gradual 0.169230769 0.001087393 12-24 h 2.037192377 19.73572408 6 Gradual 0.169230769 0.001087393 0-24 h 1.499668926 51.48436280 -0.499579125 1.924242424 6.466301918 -0.195707071 3.115801980 0.020318322 119.58532420 0.025886728 6 Gradual 0.184076923 0.004459900 0-12 h 0.423033612 78.73491609 6 Gradual 0.184076923 0.004459900 12-24 h 1.759310965 25.20562859 6 Gradual 0.184076923 0.004459900 0-24 h 1.091172289 51.97027234 -0.551346801 2.289983165 5.947115206 -0.210016835 2.040413638 0.022590296 110.00875830 0.019936559 6 Gradual 0.206230769 0.011876490 0-12 h 1.200298044 76.22150785 6 Gradual 0.206230769 0.011876490 12-24 h 1.952070035 21.51191727 6 Gradual 0.206230769 0.011876490 0-24 h 1.576184039 48.86671256 -0.551346801 2.955387205 4.206681348 -0.188552189 0.022432422 150.02172470 0.020076936