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Journal articles on the topic 'Riverine retention'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Huang, Jr-Chuan, Tsung-Yu Lee, Teng-Chiu Lin, et al. "Effects of different N sources on riverine DIN export and retention in a subtropical high-standing island, Taiwan." Biogeosciences 13, no. 6 (2016): 1787–800. http://dx.doi.org/10.5194/bg-13-1787-2016.

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Abstract. Increases in nitrogen (N) availability and mobility resulting from anthropogenic activities have substantially altered the N cycle, both locally and globally. Taiwan characterized by the subtropical montane landscape with abundant rainfall, downwind of the most rapidly industrializing eastern coast of China, can be a demonstration site for extremely high N input and riverine DIN (dissolved inorganic N) export. We used 49 watersheds with similar climatic and landscape settings but classified into low, moderate, and highly disturbed categories based on population density to illustrate

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2

Huang, J. C., T. Y. Lee, T. C. Lin, et al. "Effects of different N sources on riverine DIN export and retention in subtropical high-standing island, Taiwan." Biogeosciences Discussions 12, no. 19 (2015): 16397–430. http://dx.doi.org/10.5194/bgd-12-16397-2015.

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Abstract. Increases in nitrogen (N) availability and mobility resulting from anthropogenic activities has substantially altered N cycle both locally and globally. Taiwan characterized by the subtropical montane landscape with abundant rainfall, downwind to the most rapidly industrializing east coast of China can be a demonstration site for extreme high N input and riverine DIN (dissolved inorganic N) export. We used 49 watersheds classified into low-, moderate-, and highly-disturbed categories based on population density to illustrate their differences in nitrogen inputs through atmospheric N

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3

Mitsch, William J., Li Zhang, Christopher J. Anderson, Anne E. Altor, and Maria E. Hernández. "Creating riverine wetlands: Ecological succession, nutrient retention, and pulsing effects." Ecological Engineering 25, no. 5 (2005): 510–27. http://dx.doi.org/10.1016/j.ecoleng.2005.04.014.

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4

Adame, María Fernanda, Bernardino Virdis, and Catherine E. Lovelock. "Effect of geomorphological setting and rainfall on nutrient exchange in mangroves during tidal inundation." Marine and Freshwater Research 61, no. 10 (2010): 1197. http://dx.doi.org/10.1071/mf10013.

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One of the key ecosystem services provided by mangroves is their role in mediating nutrient exchange, thereby protecting coastal ecosystems from negative impacts of nutrient enrichment. In this study, we tested whether geomorphological setting and level of rainfall affect the intensity and direction of nutrient exchange. Our hypotheses were that tidal mangroves retain more nutrients than riverine mangroves and that nutrient retention is stronger during periods of high rainfall. Concentrations of soluble reactive phosphorus (SRP), nitrogen oxides (NOx–-N) and ammonium (NH4+) were measured from

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5

Noe, Gregory B., and Cliff R. Hupp. "Retention of Riverine Sediment and Nutrient Loads by Coastal Plain Floodplains." Ecosystems 12, no. 5 (2009): 728–46. http://dx.doi.org/10.1007/s10021-009-9253-5.

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6

Vassiljev, A., and P. Stålnacke. "Statistical modelling of riverine nutrient sources and retention in the Lake Peipsi drainage basin." Water Science and Technology 51, no. 3-4 (2005): 309–17. http://dx.doi.org/10.2166/wst.2005.0605.

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Implementation of the Water Framework Directive calls for methodologies and tools to quantify nutrient losses from diffuse sources at a river basin district scale. Here, we examine the possibility of using a statistical model for source apportionment and retention of nutrients in a large transboundary drainage basin (44,000 km2). The model approach uses non-linear regression for simultaneous estimation of e.g. source strength, i.e. export coefficients to surface waters, for the different specified land-use or soil categories and retention coefficients for pollutants in a drainage basin. The mo

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7

Stålnacke, P., A. Pengerud, A. Vassiljev, et al. "Nitrogen surface water retention in the Baltic Sea drainage basin." Hydrology and Earth System Sciences 19, no. 2 (2015): 981–96. http://dx.doi.org/10.5194/hess-19-981-2015.

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Abstract. In this paper, we estimate the surface water retention of nitrogen (N) in all the 117 drainage basins to the Baltic Sea with the use of a statistical model (MESAW) for source apportionment of riverine loads of pollutants. Our results show that the MESAW model was able to estimate the N load at the river mouth of 88 Baltic Sea rivers, for which we had observed data, with a sufficient degree of precision and accuracy. The estimated retention parameters were also statistically significant. Our results show that around 380 000 t of N are annually retained in surface waters draining to th

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8

Stålnacke, P., A. Pengerud, A. Vassiljev, et al. "Nitrogen surface water retention in the Baltic Sea drainage basin." Hydrology and Earth System Sciences Discussions 11, no. 9 (2014): 10829–58. http://dx.doi.org/10.5194/hessd-11-10829-2014.

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Abstract. In this paper, we estimate the surface water retention of nitrogen (N) in all the 117 drainage basins to the Baltic Sea with the use of a statistical model (MESAW) for source apportionment of riverine loads of pollutants. Our results show that the MESAW model was able to estimate the N load at the river mouth of 88 Baltic Sea rivers, for which we had observed data, with a sufficient degree of precision and accuracy. The estimated retention parameters were also statistically significant. Our results show that around 380 000 t of N are annually retained in surface waters draining to th

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9

Humphries, Paul, Alison King, Nicole McCasker, et al. "Riverscape recruitment: a conceptual synthesis of drivers of fish recruitment in rivers." Canadian Journal of Fisheries and Aquatic Sciences 77, no. 2 (2020): 213–25. http://dx.doi.org/10.1139/cjfas-2018-0138.

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Most fish recruitment models consider only one or a few drivers in isolation, rarely include species’ traits, and have limited relevance to riverine environments. Despite their diversity, riverine fishes share sufficient characteristics that prediction of recruitment should be possible. Here we synthesize the essential components of fish recruitment hypotheses and the key features of rivers to develop a model that predicts relative recruitment strength, for all fishes, in rivers under all flow conditions. The model proposes that interactions between flow and physical complexity will create loc

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10

Maavara, Taylor, Christopher T. Parsons, Christine Ridenour, et al. "Global phosphorus retention by river damming." Proceedings of the National Academy of Sciences 112, no. 51 (2015): 15603–8. http://dx.doi.org/10.1073/pnas.1511797112.

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More than 70,000 large dams have been built worldwide. With growing water stress and demand for energy, this number will continue to increase in the foreseeable future. Damming greatly modifies the ecological functioning of river systems. In particular, dam reservoirs sequester nutrient elements and, hence, reduce downstream transfer of nutrients to floodplains, lakes, wetlands, and coastal marine environments. Here, we quantify the global impact of dams on the riverine fluxes and speciation of the limiting nutrient phosphorus (P), using a mechanistic modeling approach that accounts for the in

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11

Beusen, Arthur H. W., Alexander F. Bouwman, Ludovicus P. H. Van Beek, José M. Mogollón, and Jack J. Middelburg. "Global riverine N and P transport to ocean increased during the 20th century despite increased retention along the aquatic continuum." Biogeosciences 13, no. 8 (2016): 2441–51. http://dx.doi.org/10.5194/bg-13-2441-2016.

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Abstract. Various human activities – including agriculture, water consumption, river damming, and aquaculture – have intensified over the last century. This has had a major impact on nitrogen (N) and phosphorus (P) cycling in global continental waters. In this study, we use a coupled nutrient-input–hydrology–in-stream nutrient retention model to quantitatively track the changes in the global freshwater N and P cycles over the 20th century. Our results suggest that, during this period, the global nutrient delivery to streams increased from 34 to 64 Tg N yr−1 and from 5 to 9 Tg P yr−1. Furthermo

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12

Beusen, A. H. W., A. F. Bouwman, L. P. H. Van Beek, J. M. Mogollón, and J. J. Middelburg. "Global riverine N and P transport to ocean increased during the twentieth century despite increased retention along the aquatic continuum." Biogeosciences Discussions 12, no. 23 (2015): 20123–48. http://dx.doi.org/10.5194/bgd-12-20123-2015.

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Abstract. Various human activities, including agriculture, water consumption, river damming, and aquaculture, have intensified over the last century. This has had a major impact on nitrogen (N) and phosphorus (P) cycling in global continental waters. In this study, we use a coupled nutrient-input, hydrology, in-stream nutrient retention model to quantitatively track the changes in the global freshwater N and P cycles over the 20th century. Our results suggest that, during this period, the global nutrient delivery to streams increased from 34 to 64 Tg N yr−1 and from 5 to 9 Tg N yr−1. Furthermo

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13

Cook, Perran L. M., K. T. Aldridge, S. Lamontagne, and J. D. Brookes. "Retention of nitrogen, phosphorus and silicon in a large semi-arid riverine lake system." Biogeochemistry 99, no. 1-3 (2009): 49–63. http://dx.doi.org/10.1007/s10533-009-9389-6.

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14

Ouellet, Patrick, and Julian J. Dodson. "Tidal Exchange of Anadromous Rainbow Smelt (Osmerus mordax) Larvae Between a Shallow Spawning Tributary and the St, Lawrence Estuary." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 8 (1985): 1352–58. http://dx.doi.org/10.1139/f85-170.

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The factors involved in the riverine transport and tidal exchange of yolk-sac rainbow smelt (Osmerus mordax) larvae between Ouelle River and the St. Lawrence estuary were documented. A 72-h sampling series provided evidence of synchronous nighttime hatching of larvae independent of water temperature and river hydrodynamics. Although light conditions influence the vertical distribution of yolk-sac larvae at the river's mouth, the influence of current speed on larval vertical distribution appears to be a more important element in the dynamics of riverine drift and tidal exchange. Yolk-sac larvae

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15

Sadaoui, Mahrez, Wolfgang Ludwig, François Bourrin, Yves Bissonnais, and Estela Romero. "Anthropogenic Reservoirs of Various Sizes Trap Most of the Sediment in the Mediterranean Maghreb Basin." Water 10, no. 7 (2018): 927. http://dx.doi.org/10.3390/w10070927.

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The purpose of this study is to obtain a spatially explicit assessment of the impact of reservoirs on natural river sediment fluxes to the sea in the Mediterranean Maghreb Basin (MMB), a region where both mechanical erosion rates and the anthropogenic pressure on surface water resources are high. We combined modeling of riverine sediment yields (sediment fluxes divided by the drainage basin area) and water drainage intensities in a 5’ × 5’ grid point resolution (~10 km × 10 km) with a compilation of existing reservoirs in the area, and calculated sediment trapping based on average water reside

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16

Andersson, Lotta, and Berit Arheimer. "Consequences of changed wetness on riverine nitrogen – human impact on retention vs. natural climatic variability." Regional Environmental Change 2, no. 3 (2001): 93–105. http://dx.doi.org/10.1007/s101130100024.

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17

Venohr, M., I. Donohue, S. Fogelberg, B. Arheimer, K. Irvine, and H. Behrendt. "Nitrogen retention in a river system and the effects of river morphology and lakes." Water Science and Technology 51, no. 3-4 (2005): 19–29. http://dx.doi.org/10.2166/wst.2005.0571.

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The mean annual transfer (loss and retention) of nitrogen in a river system was estimated using a conceptual approach based on water surface area and runoff. Two different approaches for the calculation of water surface area were applied to determine riverine nitrogen retention in four European catchments, ranging between 860–14,000 km2 in area, and differing considerably in the proportion and distribution of surface waters, specific runoff and specific nutrient emissions. The transfer rate was estimated sequentially as either the mean value for the total catchment, on a sub-catchment scale, o

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18

Bartl, Ines, Dana Hellemann, Christophe Rabouille, et al. "Particulate organic matter controls benthic microbial N retention and N removal in contrasting estuaries of the Baltic Sea." Biogeosciences 16, no. 18 (2019): 3543–64. http://dx.doi.org/10.5194/bg-16-3543-2019.

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Abstract. Estuaries worldwide act as “filters” of land-derived nitrogen (N) loads, yet differences in coastal environmental settings can affect the N filter function. We investigated microbial N retention (nitrification, ammonium assimilation) and N removal (denitrification, anammox) processes in the aphotic benthic system (bottom boundary layer (BBL) and sediment) of two Baltic Sea estuaries differing in riverine N loads, trophic state, geomorphology, and sediment type. In the BBL, rates of nitrification (5–227 nmol N L−1 d−1) and ammonium assimilation (9–704 nmol N L−1 d−1) were not enhanced

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19

Carbonnel, Vincent, Jean-Pierre Vanderborght, and Lei Chou. "Silica Mass-Balance and Retention in the Riverine and Estuarine Scheldt Tidal System (Belgium/The Netherlands)." Aquatic Geochemistry 19, no. 5-6 (2013): 501–16. http://dx.doi.org/10.1007/s10498-013-9201-z.

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20

Compton, Jana E., Kara E. Goodwin, Daniel J. Sobota, and Jiajia Lin. "Seasonal Disconnect Between Streamflow and Retention Shapes Riverine Nitrogen Export in the Willamette River Basin, Oregon." Ecosystems 23, no. 1 (2019): 1–17. http://dx.doi.org/10.1007/s10021-019-00383-9.

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21

Gabriel, O., D. Balla, T. Kalettka, and S. Maassen. "Sink or source? - The effect of hydrology on phosphorus release in the cultivated riverine wetland Spreewald (Germany)." Water Science and Technology 58, no. 9 (2008): 1813–22. http://dx.doi.org/10.2166/wst.2008.564.

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The cultivated riverine wetland region Spreewald faces detrimental changes in the hydrological conditions due to a significant discharge reduction. With its dense network of impounded waterways and a forced tendency of sedimentation of soluble reactive phosphorus adsorbed to large amounts of FeOH/FeOOH available from mining water and groundwater discharges the 320 km2 region is favoured to accumulate large amounts of total phosphorus (TR) and thus act as an effective phosphorus sink. The change of conditions strongly challenges this function hereafter. This is especially important because eutr

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22

Grimes, CB, and MJ Kingsford. "How do Riverine Plumes of Different Sizes Influence Fish Larvae: do they Enhance Recruitment?" Marine and Freshwater Research 47, no. 2 (1996): 191. http://dx.doi.org/10.1071/mf9960191.

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A review of the literature suggests that river discharge plumes strongly influence fish larvae and may play a significant role in the recruitment of local fishes. Some rivers drain large land masses to discharge shallow, turbid and nutrient-rich plumes that interact with ocean currents as well as with local oceanography and meteorology; these plumes may extend hundreds of kilometres offshore and alongshore. The frontal, or mixing, zone between plume and ocean waters is characterized by strong physical and biological processes. Physical dynamics, e.g. hydrodynamic convergence, and abundant nutr

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23

BERGSTRÖM, ANN-KRISTIN, CHRISTIAN BIGLER, ULRIKA STENSDOTTER, and EVA S. LINDSTRÖM. "Composition and dispersal of riverine and lake phytoplankton communities in connected systems with different water retention times." Freshwater Biology 53, no. 12 (2008): 2520–29. http://dx.doi.org/10.1111/j.1365-2427.2008.02080.x.

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24

Sullivan, B. J., G. S. Baxter, A. T. Lisle, L. Pahl, and W. M. Norris. "Low-density koala (Phascolarctos cinereus) populations in the mulgalands of south-west Queensland. IV. Abundance and conservation status." Wildlife Research 31, no. 1 (2004): 19. http://dx.doi.org/10.1071/wr02037.

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Urban encroachment on dense, coastal koala populations has ensured that their management has received increasing government and public attention. The recently developed National Koala Conservation Strategy calls for maintenance of viable populations in the wild. Yet the success of this, and other, conservation initiatives is hampered by lack of reliable and generally accepted national and regional population estimates. In this paper we address this problem in a potentially large, but poorly studied, regional population in the State that is likely to have the largest wild populations. We draw o

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25

Zilius, Mindaugas, Irma Vybernaite-Lubiene, Diana Vaiciute, et al. "Spatiotemporal patterns of N<sub>2</sub> fixation in coastal waters derived from rate measurements and remote sensing." Biogeosciences 18, no. 5 (2021): 1857–71. http://dx.doi.org/10.5194/bg-18-1857-2021.

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Abstract. Coastal lagoons are important sites for nitrogen (N) removal via sediment burial and denitrification. Blooms of heterocystous cyanobacteria may diminish N retention as dinitrogen (N2) fixation offsets atmospheric losses via denitrification. We measured N2 fixation in the Curonian Lagoon, Europe's largest coastal lagoon, to better understand the factors controlling N2 fixation in the context of seasonal changes in phytoplankton community composition and external N inputs. Temporal patterns in N2 fixation were primarily determined by the abundance of heterocystous cyanobacteria, mainly

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26

Wendland, F., R. Kunkel, A. Grimvall, B. Kronvang, and D. I. Müller-Wohlfell. "The SOIL-N/WEKU model system – a GIS-supported tool for the assessment and management of diffuse nitrogen leaching at the scale of river basins." Water Science and Technology 45, no. 9 (2002): 285–92. http://dx.doi.org/10.2166/wst.2002.0260.

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The SOIL-N/WEKU model system was developed to estimate groundwater-borne nitrogen inputs into river systems. The core of this model system is composed of a soil nitrogen leaching model (SOIL-N) and a groundwater residence time/denitrification model (WEKU). The application of the model system was carried out in the framework of the EU-project RANR (Regional analysis of subsurface nitrogen retention and its impact on the nitrogen export from land to sea) for a macroscale study river basin in Germany (the Uecker basin, ca. 2,400 km2) and a mesoscale study catchment area in Denmark (the Gjern basi

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27

Smith, C. J., F. X. Dunin, R. Poss, and J. F. Angus. "Nitrogen budget of wheat growing on a Riverine clay soil." Australian Journal of Agricultural Research 51, no. 7 (2000): 867. http://dx.doi.org/10.1071/ar99138.

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The fate of nitrogen in wheat grown on a Mesotrophic, Red Kandosol near Wagga Wagga was studied in the 1993 growing season, which had above-average rainfall: 417 mm (31 May–30 November 1993) compared with an average (June–November) of 289 mm. Nitrogen supply (fertiliser and mineralisation) was partitioned between crop uptake, gaseous and leaching losses, and residual mineral N in the soil profile. The study plots were 2 adjacent 5-ha areas. At stem elongation (Zadock’s decimal code 31), one area was topdressed with urea at 14 g N/m2 (fertilised crop). The total N supply to the fertilised crop

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28

Perera, A. "Movement and retention of propanil N-(3,4-dichlorophenyl)propanamide in a paddy-riverine wetland system in Sri lanka." Agriculture, Ecosystems & Environment 72, no. 3 (1999): 255–63. http://dx.doi.org/10.1016/s0167-8809(98)00184-4.

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29

Bayley, R., C. T. Ta, C. J. Sherwin, and P. J. Renton. "Traditional and novel reservoir management techniques to enhance water quality for subsequent potable water treatment." Water Supply 1, no. 1 (2001): 9–16. http://dx.doi.org/10.2166/ws.2001.0002.

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Thames Water treats approximately 2800MI/d of water originating mainly from the lowland rivers Thames and Lee for supply to over 7.3 million customers, principally in the cities of London and Oxford. Most of the river water sources are stored in bank-side, pumped, storage reservoirs prior to treatment for potable use. Storage reservoir sizes vary and typical theoretical retention times lie between a few days to several weeks or months. During storage the riverine biota is largely replaced by lacustrine taxa which can cause problems for subsequent water treatment, particularly filtration. Recen

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30

Dürr, H. H., M. Meybeck, J. Hartmann, G. G. Laruelle, and V. Roubeix. "Global spatial distribution of natural riverine silica inputs to the coastal zone." Biogeosciences Discussions 6, no. 1 (2009): 1345–401. http://dx.doi.org/10.5194/bgd-6-1345-2009.

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Abstract. Silica, SiO2, in dissolved (DSi) and particulate (PSi) form, is both a major product of continental weathering as well as an essential nutrient in terrestrial and aquatic systems. Here we present estimates of the spatial distribution of riverine silica fluxes under natural conditions, i.e. without human influence, to ~140 segments of the global coastal zone. Focussing on the construction of the DSi budget, natural DSi concentration is multiplied with discharge of rivers for each segment for documented basins and segments. Segments with no documentation available are estimated using c

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31

Quellet, Patrick, and Julian J. Dodson. "Dispersion and Retention of Anadromous Rainbow Smelt (Osmerus mordax) Larvae in the Middle Estuary of the St. Lawrence River." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 2 (1985): 332–41. http://dx.doi.org/10.1139/f85-042.

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The vertical and horizontal distribution of anadromous rainbow smelt (Osmerus mordax) larvae from hatching in their natal river to their occupation of nursery areas in the middle estuary of the St. Lawrence River was documented to describe the mechanism responsible for the retention of smelt larvae in this area. Peaks of larval abundance observed downstream of the spawning grounds indicate a 24-h periodicity in hatching and the introduction of larvae into the riverine circulation. No retention of larvae was observed between the spawning ground and the downstream portion of the natal river. Our

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32

Ackermann, Andrea, Judith Mahnkopf, Claudia Heidecke, and Markus Venohr. "Reducing agricultural nitrogen inputs in the German Baltic Sea catchment – trends and policy options." Water Science and Technology 74, no. 5 (2016): 1060–68. http://dx.doi.org/10.2166/wst.2016.267.

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We depict recent agricultural nitrogen input and future loads to be expected in 2021 in the German Baltic Sea catchment to assess the feasibility of reaching water quality targets defined by the Marine Strategy Framework Directive (MSFD). We calculate recent and future nitrogen balances from agriculture by applying an interdisciplinary modelling system, also considering the effects of the Nitrate Directive. The nitrogen surpluses are transferred to a nutrient emission model to simulate nitrogen emissions, in-stream retention and resulting riverine loads to the sea until 2021. Finally, we analy

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Dürr, H. H., M. Meybeck, J. Hartmann, G. G. Laruelle, and V. Roubeix. "Global spatial distribution of natural riverine silica inputs to the coastal zone." Biogeosciences 8, no. 3 (2011): 597–620. http://dx.doi.org/10.5194/bg-8-597-2011.

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Abstract. Silica, SiO2, in dissolved (DSi) and particulate (PSi) form, is both a major product of continental weathering as well as an essential nutrient in terrestrial and aquatic systems. Here we present estimates of the spatial distribution of riverine silica fluxes under natural conditions, i.e. without human influence, to ~140 segments of the global coastal zone. Focussing on the construction of the DSi budget, natural DSi concentration is multiplied with discharge of rivers for each segment for documented basins and segments. Segments with no documentation available are estimated using c

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34

Perbiche-Neves, Gilmar, Geoffrey A. Boxshall, Marcos G. Nogueira, and Carlos E. F. da Rocha. "Trends in planktonic copepod diversity in reservoirs and lotic stretches in a large river basin in South America." Marine and Freshwater Research 65, no. 8 (2014): 727. http://dx.doi.org/10.1071/mf13109.

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Copepod assemblages were analysed across La Plata River basin, the second largest in South America. High values of species richness and Shannon–Wiener diversity were found in the lower Paraná River, the main and largest river of the basin, and in eutrophic reservoirs located in the upper basin. The species richness was negatively correlated with turbidity, probably because of the negative impact on filtration rates in calanoids. There was a trend of decreasing richness correlated with high water flow in reservoirs with short water-retention time (<40 days) and simple morphometric shape, and

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35

Wendland, F., R. Kunkel, A. Grimvall, B. Kronvang, and D. I. Müller-Wohlfeil. "Model system for the management of nitrogen leaching at the scale of river basins and regions." Water Science and Technology 43, no. 7 (2001): 215–22. http://dx.doi.org/10.2166/wst.2001.0428.

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In the framework of the EU-project RANR (Regional analysis of subsurface nitrogen retention and its impact on the nitrogen export from land to sea) a model system was developed to estimate groundwater-borne nitrogen inputs into river systems. The core of this model system is composed of a soil nitrogen leaching model (SOIL-N) and a groundwater residence time/denitrification model (WEKU). The application of the model system was carried out for the study catchment areas of the Uecker basin (ca. 2400 km2, Germany) and the Gjern basin (ca. 200 km2, Denmark). For both catchment areas, the modelled

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36

Oliveira, Eduardo Negri de, Bastiaan Adriaan Knoppers, João Antônio Lorenzzetti, Paulo Ricardo Petter Medeiros, Maria Eulália Carneiro, and Weber Friederichs Landim de Souza. "A satellite view of riverine turbidity plumes on the NE-E Brazilian coastal zone." Brazilian Journal of Oceanography 60, no. 3 (2012): 283–98. http://dx.doi.org/10.1590/s1679-87592012000300002.

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Turbidity plumes of São Francisco, Caravelas, Doce, and Paraiba do Sul river systems, located along the NE/E Brazilian coast, are analyzed for their dispersal patterns of Total Suspended Solids (TSS) concentration using Landsat images and a logarithmic algorithm proposed by Tassan (1987) to convert satellite reflectance values to TSS. The TSS results obtained were compared to in situ collected TSS data. The analysis of the satellite image data set revealed that each river system exhibits a distinct turbidity plume dispersal pattern. The behavior, dimension and degree of turbidity of the São Fr

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Shih, Y. T., T. Y. Lee, J. C. Huang, S. J. Kao, K. K. Liu, and F. J. Chang. "Inverse isolation of dissolved inorganic nitrogen yield for individual land-uses from mosaic land-use patterns within a watershed." Hydrology and Earth System Sciences Discussions 12, no. 1 (2015): 449–87. http://dx.doi.org/10.5194/hessd-12-449-2015.

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Abstract. This study combines the observed riverine DIN (dissolved inorganic nitrogen) export and the controlling factors (land-use, population and discharge) to inversely estimate the effective DIN yield factors for individual land-use and DIN per capita loading. A total of 16 sub-catchments, with different land-use compositions on the Danshui River of Taiwan, were used in this study. Observed riverine DIN concentrations and yields varied from 20–450 μM and 400–10 000 kg N km−2 yr−1 corresponding to the increase of urbanization gradient (e.g. building and population). Meanwhile, the transport

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Hawkings, Jon R., Mark L. Skidmore, Jemma L. Wadham, et al. "Enhanced trace element mobilization by Earth’s ice sheets." Proceedings of the National Academy of Sciences 117, no. 50 (2020): 31648–59. http://dx.doi.org/10.1073/pnas.2014378117.

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Trace elements sustain biological productivity, yet the significance of trace element mobilization and export in subglacial runoff from ice sheets is poorly constrained at present. Here, we present size-fractionated (0.02, 0.22, and 0.45 µm) concentrations of trace elements in subglacial waters from the Greenland Ice Sheet (GrIS) and the Antarctic Ice Sheet (AIS). Concentrations of immobile trace elements (e.g., Al, Fe, Ti) far exceed global riverine and open ocean mean values and highlight the importance of subglacial aluminosilicate mineral weathering and lack of retention of these species i

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Paudel, Bhanu, Paul A. Montagna, Mark Besonen, and Leslie Adams. "Inorganic nitrogen release from sediment slurry of riverine and estuarine ecosystems located at different river regimes." Marine and Freshwater Research 68, no. 7 (2017): 1282. http://dx.doi.org/10.1071/mf16260.

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The purpose of the present study was to compare the nature of dissolved inorganic nitrogen (DIN=ammonium (NH4+) and nitrite+nitrate (NO2+3=(NO2–+NO3–)) release from aerobic sediment slurry at two different hydrologic flow regimes. The watershed of the Guadalupe River–Estuary system receives more freshwater inflow than does the watershed of the Nueces River–Estuary system; thus, the Nueces Estuary is more saline than is the Guadalupe Estuary. Sediment samples were collected using cores, analysed for organic matter and grain size, and used to perform laboratory experiments to measure DIN release

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Alongi, Daniel M. "Macro- and Micronutrient Cycling and Crucial Linkages to Geochemical Processes in Mangrove Ecosystems." Journal of Marine Science and Engineering 9, no. 5 (2021): 456. http://dx.doi.org/10.3390/jmse9050456.

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High mangrove productivity is sustained by rapid utilization, high retention efficiency and maximum storage of nutrients in leaves, roots, and soils. Rapid microbial transformations and high mineralization efficiencies in tandem with physiological mechanisms conserve scarce nutrients. Macronutrient cycling is interlinked with micronutrient cycling; all nutrient cycles are linked closely to geochemical transformation processes. Mangroves can be N-, P-, Fe-, and Cu-limited; additions of Zn and Mo stimulate early growth until levels above pristine porewater concentrations induce toxicity. Limited

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Ehrhardt, Sophie, Rohini Kumar, Jan H. Fleckenstein, Sabine Attinger, and Andreas Musolff. "Trajectories of nitrate input and output in three nested catchments along a land use gradient." Hydrology and Earth System Sciences 23, no. 9 (2019): 3503–24. http://dx.doi.org/10.5194/hess-23-3503-2019.

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Abstract. Increased anthropogenic inputs of nitrogen (N) to the biosphere during the last few decades have resulted in increased groundwater and surface water concentrations of N (primarily as nitrate), posing a global problem. Although measures have been implemented to reduce N inputs, they have not always led to decreasing riverine nitrate concentrations and loads. This limited response to the measures can either be caused by the accumulation of organic N in the soils (biogeochemical legacy) – or by long travel times (TTs) of inorganic N to the streams (hydrological legacy). Here, we compare

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Vink, Rona, Horst Behrendt, and Wim Salomons. "Development of the heavy metal pollution trends in several European rivers: an analysis of point and diffuse sources." Water Science and Technology 39, no. 12 (1999): 215–23. http://dx.doi.org/10.2166/wst.1999.0549.

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A comparison has been made between the metal pollution in several European rivers in various stages of clean-up and management for the period of 1980-1996. The investigated rivers were Rhine, Meuse, Scheldt, Weser and Elbe. The results from this comparison showed that the simple statement that characterizes the river Elbe as ‘the most polluted river in Europe’ is a simplification. Three independent methods are presented to estimate point and diffuse source contributions in emissions and riverine transports. All methods were applied to the Elbe and Rhine rivers to estimate the contribution of p

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Mitsch, William J., Li Zhang, Evan Waletzko, and Blanca Bernal. "Validation of the ecosystem services of created wetlands: Two decades of plant succession, nutrient retention, and carbon sequestration in experimental riverine marshes." Ecological Engineering 72 (November 2014): 11–24. http://dx.doi.org/10.1016/j.ecoleng.2014.09.108.

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Bouillon, S., G. Abril, A. V. Borges, et al. "Distribution, origin and cycling of carbon in the Tana River (Kenya): a dry season basin-scale survey from headwaters to the delta." Biogeosciences 6, no. 11 (2009): 2475–93. http://dx.doi.org/10.5194/bg-6-2475-2009.

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Abstract. The Tana River basin (TRB) is the largest in Kenya (~120 000 km2). We conducted a survey during the dry season throughout the TRB, analyzing a broad suite of biogeochemical parameters. Biogeochemical signatures in headwater streams were highly variable. Along the middle and lower river course, total suspended matter (TSM) concentrations increased more than 30-fold despite the absence of tributary inputs, indicating important resuspension events of internally stored sediment. These resuspended sediment inputs were characterized by a lower and 14C-depleted OC content, suggesting select

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Bouillon, S., G. Abril, A. V. Borges, et al. "Distribution, origin and cycling of carbon in the Tana River (Kenya): a dry season basin-scale survey from headwaters to the delta." Biogeosciences Discussions 6, no. 3 (2009): 5959–6023. http://dx.doi.org/10.5194/bgd-6-5959-2009.

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Abstract. The Tana River basin (TRB) is the largest in Kenya (~120 000 km2). We conducted a survey during the dry season throughout the TRB, analyzing a broad suite of biogeochemical parameters. Biogeochemical signatures in headwater streams were highly variable, but some organic carbon (OC) characteristics (δ13CPOC, DOC/POC ratios and %POC/TSM) were clearly correlated to surface soil characteristics. Along the middle and lower river course, total suspended matter (TSM) concentrations increased more than 30-fold despite the absence of tributary inputs, indicating important resuspension events

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Spieles, Douglas J., and William J. Mitsch. "The effects of season and hydrologic and chemical loading on nitrate retention in constructed wetlands: a comparison of low- and high-nutrient riverine systems." Ecological Engineering 14, no. 1-2 (1999): 77–91. http://dx.doi.org/10.1016/s0925-8574(99)00021-x.

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AHLBERG, Per E. "Follow the footprints and mind the gaps: a new look at the origin of tetrapods." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 109, no. 1-2 (2018): 115–37. http://dx.doi.org/10.1017/s1755691018000695.

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ABSTRACTThe hypothesis that tetrapods evolved from elpistostegids during the Frasnian, in a predominantly aquatic context, has been challenged by the discovery of Middle Devonian tetrapod trackways predating the earliest body fossils of both elpistostegids and tetrapods. Here I present a new hypothesis based on an overview of the trace fossil and body fossil evidence. The trace fossils demonstrate that tetrapods were capable of performing subaerial lateral sequence walks before the end of the Middle Devonian. The derived morphological characters of elpistostegids and Devonian tetrapods are rel

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Woods, Ryan J., Jed I. Macdonald, David A. Crook, Daniel J. Schmidt, and Jane M. Hughes. "Contemporary and historical patterns of connectivity among populations of an inland river fish species inferred from genetics and otolith chemistry." Canadian Journal of Fisheries and Aquatic Sciences 67, no. 7 (2010): 1098–115. http://dx.doi.org/10.1139/f10-043.

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Patterns of dispersal in riverine populations of Australian smelt ( Retropinna semoni ) were examined using otolith chemistry (Mg:Ca, Mn:Ca, Sr:Ca, Ba:Ca) and genetic markers (allozymes, mtDNA, microsatellite DNA). During a period of prolonged low flows, young-of-year smelt were collected from 13 streams within three catchments of the southern Murray–Darling Basin, Australia. Spatial differences in otolith core and edge chemical signatures and high levels of genetic assignment to sampling locations were observed, suggesting that most recruits were retained in natal areas after spawning. Follow

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Salata, Stefano, Silvia Ronchi, Carolina Giaimo, Andrea Arcidiacono, and Giulio Gabriele Pantaloni. "Performance-Based Planning to Reduce Flooding Vulnerability Insights from the Case of Turin (North-West Italy)." Sustainability 13, no. 10 (2021): 5697. http://dx.doi.org/10.3390/su13105697.

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Climate change impacts urban areas with greater frequency and exposes continental cities located on floodplains to extreme cloudbursts events. This scenario requires developing specific flooding vulnerability mitigation strategies that improve local knowledge of flood-prone areas at the urban scale and supersede the traditional hazard approach based on the classification of riverine buffers. Moreover, decision-makers need to adopt performance-based strategies for contrasting climate changes and increasing the resilience of the system. This research develops the recent Flooding Risk Mitigation

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Park, Ji-Hyung, Omme K. Nayna, Most S. Begum, et al. "Reviews and syntheses: Anthropogenic perturbations to carbon fluxes in Asian river systems – concepts, emerging trends, and research challenges." Biogeosciences 15, no. 9 (2018): 3049–69. http://dx.doi.org/10.5194/bg-15-3049-2018.

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Abstract. Human activities are drastically altering water and material flows in river systems across Asia. These anthropogenic perturbations have rarely been linked to the carbon (C) fluxes of Asian rivers that may account for up to 40–50 % of the global fluxes. This review aims to provide a conceptual framework for assessing the human impacts on Asian river C fluxes, along with an update on anthropogenic alterations of riverine C fluxes. Drawing on case studies conducted in three selected rivers (the Ganges, Mekong, and Yellow River) and other major Asian rivers, the review focuses on the imp

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