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Journal articles on the topic 'Northern rivers'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Morales, Maria C., and Jaime Meruane. "The northern river shrimp Cryphiops caementarius (Decapoda, Palaemonidae). Research chronology between 1958 and 2008, I: distribution, population status, biology and life cycle." Crustaceana 86, no. 12 (2013): 1441–51. http://dx.doi.org/10.1163/15685403-00003259.

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The present study is a review of the main inland water malacostracan species of northern Chile: Cryphiops caementarius (Molina, 1782). This species sustains the local fisheries in northern and central Chilean hydrographical basins. Cryphiops caementarius, in Chile known as the northern river shrimp, is endemic to rivers west of the Andes Mountains in Peru, and south from Chancay-Lambayeque River and the rivers in the northern Chilean littoral up to 32°55′S. Research on this species in its natural habitat consigned between 1958 to 2008 was directed to population knowledge, including mainly the

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2

Philippsen, Bente, and Jan Heinemeier. "Freshwater Reservoir Effect Variability in Northern Germany." Radiocarbon 55, no. 3 (2013): 1085–101. http://dx.doi.org/10.1017/s0033822200048001.

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The freshwater reservoir effect is a potential problem when radiocarbon dating fish bones, shells, human bones, or food crusts on pottery from sites near rivers or lakes. The reservoir age in hardwater rivers can be up to several thousand years and may be highly variable. Accurate 14C dating of freshwater-based samples requires knowing the order of magnitude of the reservoir effect and its degree of variability. Measurements on modern riverine materials may not give a single reservoir age correction that can be applied to archaeological samples, but they show the order of magnitude and variabi

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3

Ganf, George G., and Naomi Rea. "Potential for algal blooms in tropical rivers of the Northern Territory, Australia." Marine and Freshwater Research 58, no. 4 (2007): 315. http://dx.doi.org/10.1071/mf06161.

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Rivers in the Northern Territory (NT) of Australia are under pressure from increasing vegetation clearance, land use and nutrient run-off. The literature on algal blooms clearly identifies the predisposing factors but in the NT, these factors are not well researched. We report on the potential for tropical rivers to experience problems related to algal growth. NT rivers were found to have a low nutrient status and a viable inoculum of blue-green, brown and green algal communities. The growth response of these algal groups to nutrient enrichment via bioassays and pulse-amplitude-modulation (PAM

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4

Ulvan, Eva Marita, Anders Foldvik, Arne Johan Jensen, Bengt Finstad, Eva Bonsak Thorstad, Audun Håvard Rikardsen, and Tor Fredrik Næsje. "Return migration of adult Atlantic salmon (Salmo salar L.) to northern Norway." ICES Journal of Marine Science 75, no. 2 (September 18, 2017): 653–61. http://dx.doi.org/10.1093/icesjms/fsx183.

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Abstract The return migration of adult Atlantic salmon was investigated by analysing recaptures of individuals tagged and released as smolts in the River Altaelva and the River Halselva using a catch per unit effort approach. Although the salmon were recaptured over a large area along the coastline (from &gt;1100 km south to &gt; 500 km northeast of their home rivers), the results indicated a relatively accurate homeward navigation for most individuals. The straying rate to rivers other than the home river was 9%. Multi-sea-winter salmon returned earlier in the season than one-sea-wint

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5

Lehnhoff, Erik A., Fabian D. Menalled, and Lisa J. Rew. "Tamarisk (Tamarixspp.) Establishment in its Most Northern Range." Invasive Plant Science and Management 4, no. 1 (March 2011): 58–65. http://dx.doi.org/10.1614/ipsm-d-10-00036.1.

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AbstractTamarisk, a shrub or small tree native to Eurasia, was introduced to North America in the early 1800s and is now naturalized throughout many riparian areas of the southwestern United States, where extensive research has been conducted. It is a more recent invader to the northern Great Plains, and fewer studies have been conducted on tamarisk ecology and management in this area. The objectives of this research were to investigate the overwintering potential of tamarisk seeds in Montana and the relationship between hydrologic conditions and historic tamarisk establishment. Emergence of s

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6

Senay, C., S. Harvey-Lavoie, C. J. Macnaughton, G. Bourque, and D. Boisclair. "Morphological differentiation in northern pike (Esox lucius): the influence of environmental conditions and sex on body shape." Canadian Journal of Zoology 95, no. 6 (June 2017): 383–91. http://dx.doi.org/10.1139/cjz-2016-0159.

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Morphological differentiation may allow individuals to cope with prevailing environmental conditions. Morphological differentiation in fish characterized by sagittiform shape and ambush predator behaviour, such as northern pike (Esox lucius L., 1758), has rarely been addressed. Morphological differentiation was assessed in two rivers exhibiting contrasting flow regimes: a hydropeaking river characterized by large and frequent fluctuations in flow rates and an unregulated river. An increase in northern pike movement rate was observed in the hydropeaking river. Therefore, morphological features

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7

Jensen, Arne Johan, and Bjørn Ove Johnsen. "Different Adaptation Strategies of Atlantic Salmon (Salmo salar) Populations to Extreme Climates with Special Reference to some Cold Norwegian Rivers." Canadian Journal of Fisheries and Aquatic Sciences 43, no. 5 (May 1, 1986): 980–84. http://dx.doi.org/10.1139/f86-120.

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Some of the salmon rivers on the western and northern coasts of Norway are very cold, and the sea temperature outside these rivers is almost always higher than that in the river. Growth rates of Atlantic salmon (Salmo salar) parr and smolt ages and sizes have been examined in three such cold rivers. We found indications that the lower temperature limit for growth of Atlantic salmon is not a fixed temperature, but varies from population to population according to the temperature regime of their environment. Smolts are small, with average sizes of 12–13 cm total length. Females dominated in numb

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8

Degerman, Erik, Kjell Leonardsson, and Hans Lundqvist. "Coastal migrations, temporary use of neighbouring rivers, and growth of sea trout (Salmo trutta) from nine northern Baltic Sea rivers." ICES Journal of Marine Science 69, no. 6 (July 1, 2012): 971–80. http://dx.doi.org/10.1093/icesjms/fss073.

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Abstract Degerman, E., Leonardsson, K., and Lundqvist, H. 2012. Coastal migrations, temporary use of neighbouring rivers, and growth of Sea trout (Salmo trutta) from nine northern Baltic Sea rivers – ICES Journal of Marine Science, 69: 971–980. The wild migratory trout (Salmo trutta) stocks in the northern Baltic Sea are threatened, and the fishery is thought to play a significant role in the population decline. Therefore, knowledge about the migration patterns of these stocks is needed to develop appropriate management plans. For this reason, we analysed the movement pattern from recaptures o

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9

Bataragoa, Nego Elvis, and Alex D. Kambey. "Species of Fish in rivers in the Northern Peninsula of Sulawesi Island." Jurnal Ilmiah PLATAX 9, no. 1 (June 22, 2021): 66. http://dx.doi.org/10.35800/jip.9.1.2021.34330.

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This study aims to determine the species of fish found in the Poigar River, Ranoyapo River, Maruasey River, Talawaan River, and Likupang River in the northern peninsula of Sulawesi Island. These five rivers empty into the Sulawesi Sea. Sampling was carried out in the upstream, middle and downstream parts of the river, all sampling areas were freshwater areas, estuary areas with brackish water types were not included in this study. Sampling was carried out using cast nets and electric shocks. There are 58 species (16 orders, 21 families, 40 genera). Families Gobidae (9 genera, 19 species) and E

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10

Wrona, Fred J., and William Gummer. "Northern rivers ecosystem initiative: contextual overview." Hydrological Processes 20, no. 19 (2006): 4005–7. http://dx.doi.org/10.1002/hyp.6429.

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11

KO, MING-KO, and AONDOVER TARHULE. "Streamflow droughts of northern Nigerian rivers." Hydrological Sciences Journal 39, no. 1 (February 1994): 19–34. http://dx.doi.org/10.1080/02626669409492717.

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12

Curtean-Bănăduc, Angela. "Benthic Macroinvertebrate Communities in the Northern Tributaries of the “Iron Gates” Gorge (Danube River)." Transylvanian Review of Systematical and Ecological Research 16, no. 3 (December 1, 2014): 151–64. http://dx.doi.org/10.1515/trser-2015-0039.

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Abstract The paper presents the structure of the benthonic macro-invertebrates communities in the Berzasca, Sirinia, Liubcova, and Mraconia rivers. The results are based on quantitative benthos samples (95 samples), collected in July 2014 from 19 sampling stations within the study area. In longitudinal profile, the benthonic macro-invertebrate communities of the Sirinia, Liubcova and Berzasca rivers displays relatively large structural variability, while the communities of the Mraconia River displays smaller structural variability. The structure of the benthonic macro-invertebrate communities

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13

Andrishak, R., and F. Hicks. "Simulating the effects of climate change on the ice regime of the Peace River." Canadian Journal of Civil Engineering 35, no. 5 (May 2008): 461–72. http://dx.doi.org/10.1139/l07-129.

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Winter can be a critical time on many rivers, during which ice conditions and a number of environmental factors can lead to rapidly developing and damaging flood events. Also, in northern Canada, rivers are important for both summer (ferry) and winter (ice bridge) transportation; however, during periods of variable ice conditions these transportation links are temporarily interrupted. As a result, northern communities can become isolated for periods of time. With climate warming becoming an increasing concern, it is important to know how elevated temperatures might affect river ice covers so t

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14

Rawlins, Michael A., Lei Cai, Svetlana L. Stuefer, and Dmitry Nicolsky. "Changing characteristics of runoff and freshwater export from watersheds draining northern Alaska." Cryosphere 13, no. 12 (December 18, 2019): 3337–52. http://dx.doi.org/10.5194/tc-13-3337-2019.

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Abstract. The quantity and quality of river discharge in Arctic regions is influenced by many processes including climate, watershed attributes and, increasingly, hydrological cycle intensification and permafrost thaw. We used a hydrological model to quantify baseline conditions and investigate the changing character of hydrological elements for Arctic watersheds between Utqiagvik (formerly known as Barrow)) and just west of Mackenzie River over the period 1981–2010. A synthesis of measurements and model simulations shows that the region exports 31.9 km3 yr−1 of freshwater via river discharge,

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15

Morse, Brian, and Guy Trudeau. "Agencement de prises d'eau en région nordique." Canadian Journal of Civil Engineering 30, no. 1 (February 1, 2003): 69–76. http://dx.doi.org/10.1139/l02-035.

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The great quantity of small rivers in proximity of Canadian communities provide an excellent source of potable water. However, in our northern climate, intake structures must be built in rivers that are infested with ice. Since ice and hydraulic structures do not cohabit very well, the intakes must be designed to account for the many forms of ice. Referring to specific case studies, we examine the advantages and disavantages of conventional designs for municipal and industrial intakes. Conventional designs often employ weirs to raise water levels, whereas percolation systems withdraw water thr

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16

Framenau, Volker W., Randolf Manderbach, and Martin Baehr. "Riparian gravel banks of upland and lowland rivers in Victoria (south-east Australia): arthropod community structure and life-history patterns along a longitudinal gradient." Australian Journal of Zoology 50, no. 1 (2002): 103. http://dx.doi.org/10.1071/zo01039.

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Riparian sand and gravel banks are inhabited by a fauna that is well adapted to varying river water levels and frequent inundation of the banks. Arthropods found in these habitats were studied from November 1998 to January 1999 in the upper and lower floodplains of the main rivers and tributaries in ten major catchments in the Victorian Alps. Wolf spiders (Lycosidae, 68%) and ground beetles (Carabidae, 7.8%) were the most abundant arthropods, with densities averaging 14.6 ± 1.8 (s.e.) and 2.3 ± 0.4 individuals m–2 respectively. Species composition and wolf spider densities changed substantiall

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17

Woo, Ming-ko, Robin Thorne, and Laura Brown. "Comparison of runoff and river flow in two large northern basins." Hydrology Research 50, no. 6 (August 16, 2018): 1609–22. http://dx.doi.org/10.2166/nh.2018.199.

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Abstract The magnitude and timing of water delivery in two large northern basins are analysed to clarify where runoff is generated and how their rivers acquire comparable regimes (or seasonal rhythms) of flow. These two rivers, the Mackenzie in Canada and the Yenisei in Russia, traverse similar latitudes, physiographic provinces, vegetation zones and climatic regions. Within the basins, mountainous terrain and high-precipitation sections usually yield large runoff, but low runoff comes from the plains, low plateaus and areas of aridity. Winter runoff is commonly low and snowmelt is responsible

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18

Huusko, Riina, Pekka Hyvärinen, Mikko Jaukkuri, Aki Mäki-Petäys, Panu Orell, and Jaakko Erkinaro. "Survival and migration speed of radio-tagged Atlantic salmon (Salmo salar) smolts in two large rivers: one without and one with dams." Canadian Journal of Fisheries and Aquatic Sciences 75, no. 8 (August 2018): 1177–84. http://dx.doi.org/10.1139/cjfas-2017-0134.

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Connectivity problems in fish migration in regulated rivers have been widely studied, but few studies have rigorously compared parallel migration success between regulated and free-flowing rivers. Here, survival and migration speed of downstream migrating radio-tagged Atlantic salmon (Salmo salar) smolts were studied in two large neighboring rivers in the northern Baltic Sea area: one without and one with dams. Both rivers have a free-flowing upper section, where the survival and migration speed of salmon smolts were similar. Survival along the lower section of the free-flowing river was about

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19

Astrakhantseva, Olga Yu, and Oleg Yu Palkin. "Average annual background quantity of chemical elements and organic matter in the streams of the "River" environment flowing into Lake Baikal reservoirs." XXI century. Technosphere Safety 5, no. 4 (December 2020): 433–47. http://dx.doi.org/10.21285/2500-1582-2020-4-433-447.

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The aim of the article is to assess the average long-term background hydrochemical input of chemical elements and organic matter from the flows of the natural component of the environment "Rivers" flowing into the South, Selenginsky, Middle and North reservoirs of Lake. Baikal. The results of calculation of the average annual amount (g/year) of chemical elements and organic matter (Na+, K+, Ca2+, Mg2+, Al, Si, Mn2+, Feобщ , SO42-, HCO3-, Cl-, NO3-, PO43-, Cr, Cu, Cd, Hg, Pb, Sr, Zn, Co, U, V, Mo, Cорг, Nорг, Pорг, Sорг, CO2, Ti) in the streams of the natural component of the environment "River

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20

Douglas, Michael M., Stuart E. Bunn, and Peter M. Davies. "River and wetland food webs in Australia's wet - dry tropics: general principles and implications for management." Marine and Freshwater Research 56, no. 3 (2005): 329. http://dx.doi.org/10.1071/mf04084.

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The tropical rivers of northern Australia have received international and national recognition for their high ecological and cultural values. Unlike many tropical systems elsewhere in the world and their temperate Australian counterparts, they have largely unmodified flow regimes and are comparatively free from the impacts associated with intensive land use. However, there is growing demand for agricultural development and existing pressures, such as invasive plants and feral animals, threaten their ecological integrity. Using the international literature to provide a conceptual framework and

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21

Jerry, Dean R., and David J. Woodland. "Electrophoretic evidence for the presence of the undescribed ‘Bellinger’ catfish (Tandanus sp.) (Teleostei : Plotosidae) in four New South Wales mid-northern coastal rivers." Marine and Freshwater Research 48, no. 3 (1997): 235. http://dx.doi.org/10.1071/mf95141.

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Genetic data were collected from eight allopatric populations of the common freshwater catfish, Tandanus tandanus. Catfish sampled from the New South Wales (NSW) mid-northern coastal rivers of the Bellinger, Macleay, Hastings and Manning exhibited fixed allelic differences from T. tandanus from the type locality (Namoi River) at four enzymatic loci (GPI-1*, EST*, UMB-1* and UMB-2*), suggesting that, collectively, catfish from these four river systems constitute an undescribed species of Tandanus. Catfish from the northern coastal rivers of NSW (Tweed, Richmond and Clarence) displayed a complex

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22

Niemelä, Riitta, Anna-Mari Auniola, Helena Jansson, Yevgeniy Ponomarenko, Felix Stolberg, and Rikard Thurdin. "De-eutrophication of northern rivers and lakes - experiences from ProAQUA-project." River Systems 13, no. 3-4 (January 1, 2002): 423–35. http://dx.doi.org/10.1127/lr/13/2002/423.

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23

Nilsson, Christer. "Change in riparian plant community composition along two rivers in northern Sweden." Canadian Journal of Botany 64, no. 3 (March 1, 1986): 589–92. http://dx.doi.org/10.1139/b86-076.

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Large-scale spatial variation in vascular plant communities at 62 shoreline sites along the Piteälven and Laisälven–Vindelälven (rivers), in northern Sweden, was examined using two-way indicator species analysis (TWINSPAN). The first four clusters generated for each river were explained by shore substrate and wave and flow action. The Pitealven exhibited a sequence of discrete clusters, whereas along the Laisälven–Vindelälven a high degree of overlap between clusters was found. The results suggest overall “continua,” related to climatic gradients, along both rivers with other superimposed disc

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Huitu, Eeva, and Lauri Arvola. "Water Chemistry and Bacterioplankton in Two Subalpine Rivers in Finnish Lapland." Hydrology Research 34, no. 1-2 (February 1, 2003): 139–46. http://dx.doi.org/10.2166/nh.2003.0033.

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Water chemistry and bacterioplankton were analysed for two subalpine rivers, River Kidisjoki and River Utsjoki, in northernmost Finland. The data set is based on continuous runoff measurements and weekly chemical and biological samples. The data were collected during the open water period, from May to October, in year 2000. The runoff patterns during the summer were similar in the two rivers at though the size of the catchments is very different (the catchment of River Utsjoki 1,520 km2 and of River Kidisjoki 22 km2). For both rivers, variations in runoff were followed by variations in the wat

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Anagnostoudi, Th, S. Papadopoulou, D. Ktenas, E. Gkadri, I. Pyliotis, N. Kokkidis, and V. Panagiotopoulos. "THE OLVIOS, RETHIS AND INACHOS DRAINAGE SYSTEM EVOLUTION AND HUMAN ACTIVITIES INFLUNCE OF THEIR FUTURE EVOLUTION." Bulletin of the Geological Society of Greece 43, no. 2 (January 23, 2017): 548. http://dx.doi.org/10.12681/bgsg.11217.

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Olvios, Rethis and Inachos Rivers are multistory drainage systems that occur in Northern Peloponnesus, and at the present day they have and a reversed, North to South, flow element. Dervenios, Skoupeikos and Fonissa Rivers are the misfit streams of Olvios and revealed as juvenile streams and discharge to the Corinth gulf. Agiorgitikos River is the misfit stream of Rethis River and Seliandros River is the juvenile stream. Asopos, Nemeas and Rachiani Rives are the misfit streams of Inachos River and they also discharge to the Corinth gulf. Asopos River characterized as re-established stream. Phy

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Bănăduc, Doru, and Angela Curtean-Bănăduc. "The “Porţile de Fier/Iron Gates” Nature Park (Romania) Some Danube Northern Tributaries Fish Fauna." Transylvanian Review of Systematical and Ecological Research 16, no. 3 (December 1, 2014): 165–70. http://dx.doi.org/10.1515/trser-2015-0040.

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Abstract The relative larger size of the Berzasca River, respectively the relatively constant environmental conditions, with relatively stenotopic ichthyocenosis, suffered small qualitative and quantitative fish fauna modifications in time, compared to the smaller rivers such as Sirinia, Liubcova/Oreviţa and Mraconia. The Danube “Iron Gates” I Lake influences the lower sectors of the studied rivers in term of fish species exchange. The accidental droughts in the karstic zones of the studied lotic sectors have a negative influence on the spatial continuity of the local fish fauna, and the clima

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27

Salini, J., and JB Shaklee. "Genetic structure of barramundi (Lates calcarifer) stocks from northern Australia." Marine and Freshwater Research 39, no. 3 (1988): 317. http://dx.doi.org/10.1071/mf9880317.

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Barramundi, L. calcarifer, were collected from seven localities in the Northern Territory, the Daly, Finniss, Mary, Glyde, Roper and McArthur rivers and Blue Mud Bay, and from the Ord River in Western Australia. Barramundi were sampled seven times from the Daly and Finniss rivers over a 14-month period. In total, 46 loci were identified using starch-gel electrophoresis of enzymes and polyacrylamide electrophoresis of muscle proteins. Twelve loci were polymorphic at the P0.99 level. Most loci were in Hardy-Weinberg equilibrium. A contingency Χ2 analysis for homogeneity of alleles over all loci

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28

Rennermalm, A. K., L. C. Smith, V. W. Chu, R. R. Forster, J. E. Box, and B. Hagedorn. "Proglacial river stage, discharge, and temperature datasets from the Akuliarusiarsuup Kuua River northern tributary, Southwest Greenland, 2008–2011." Earth System Science Data 4, no. 1 (May 12, 2012): 1–12. http://dx.doi.org/10.5194/essd-4-1-2012.

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Abstract. Pressing scientific questions concerning the Greenland ice sheet's climatic sensitivity, hydrology, and contributions to current and future sea level rise require hydrological datasets to resolve. While direct observations of ice sheet meltwater losses can be obtained in terrestrial rivers draining the ice sheet and from lake levels, few such datasets exist. We present a new hydrologic dataset from previously unmonitored sites in the vicinity of Kangerlussuaq, Southwest Greenland. This dataset contains measurements of river stage and discharge for three sites along the Akuliarusiarsu

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29

Shrestha, Manish, and Naresh Kazi Tamrakar. "Spatial variability of shallow groundwater level in the Northern Kathmandu Valley." Journal of Nepal Geological Society 55, no. 1 (June 4, 2018): 45–54. http://dx.doi.org/10.3126/jngs.v55i1.22788.

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Groundwater is the water which is present in pore spaces and in the fractures of the geological materials beneath earth surface. Water is incompressible substance and presence of small amount of water in geological material modifies the behavior of geological material under stresses. Determination of engineering behavior of the geological material is almost impossible skipping the role of water. The objective of this study was to map and evaluate shallow groundwater level of the northern Kathmandu Valley covering main rivers such as the Bagmati River, Bishnumati River, Dhobi Khola and the Mana

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de Bont, C. "Digging the river: the historical geography of the Amstel area (800–1275 AD)." Netherlands Journal of Geosciences - Geologie en Mijnbouw 94, no. 4 (January 16, 2015): 353–60. http://dx.doi.org/10.1017/njg.2014.42.

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AbstractAround 800 AD the peatlands around Amstelland were drained by two rivers. The ‘northern’ Amstel discharged surplus water directly into Lake Almere, which from the 12th century onwards was enlarged to form the Sudersee (in Dutch: Zuiderzee). The ‘southern’ Amstel was a near-abandoned westernmost arm of the River Vecht discharging the poorly drained borderland around the river Vecht into Lake Almere/the Sudersee. As part of the reclamation of peatlands associated with agricultural activities between the end of the 10th and the mid-13th centuries, the rivers were connected via a canal, th

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Nicieza, A. G., and F. Braña. "Relationships among Smolt Size, Marine Growth, and Sea Age at Maturity of Atlantic Salmon (Salmo salar) in Northern Spain." Canadian Journal of Fisheries and Aquatic Sciences 50, no. 8 (August 1, 1993): 1632–40. http://dx.doi.org/10.1139/f93-184.

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Scale analysis indicated that two-sea-winter (2SW) Atlantic salmon (Salmo salar) had a greater growth increment during the first year at sea than 1SW of the same smolt year in the Rivers Narcea and Esva, but no differences were found between sea age-classes in the River Cares. Interannual variation in marine growth was synchronized among rivers. Variation among years was greater than variation between sea age-classes, suggesting that marine growth per se does not determine age at maturity. In the River Narcea, 2SW salmon were larger than 1SW at the end of the first marine period, but differenc

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Dahmardeh Behrooz, Reza, Abbas Esmaili-Sari, and Paromita Chakraborty. "Distribution and ECo-Toxicological Risk Assessment of Legacy Persistent Organic Pollutants in Surface Water of Talar, Babolrood and Haraz Rivers." Water 12, no. 11 (November 4, 2020): 3104. http://dx.doi.org/10.3390/w12113104.

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In the outer Alborz Range in the Northern Province of Iran, the Haraz, Talar and Babolrood Rivers are the three largest rivers where most of the agricultural, aquacultural and industrial activities are found. Total indicator polychlorinated biphenyls (iPCBs) ranged ND–474, ND–273 and ND–559 ng/L in Haraz, Talar and Babolrood Rivers, respectively. Significantly lower (p < 0.05) concentrations of DDT, lindane and dieldrin were observed in the upstream stations than downstream stations of both Babolrood and Haraz Rivers. However, in Talar River, PCB residues in upstream was significantly highe

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Power, Mary E. "Hydrologic and trophic controls of seasonal algal blooms in northern California rivers." Archiv für Hydrobiologie 125, no. 4 (October 19, 1992): 385–410. http://dx.doi.org/10.1127/archiv-hydrobiol/125/1992/385.

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Islam, MJ, MS Rahman, Rubeca Fancy, AKMS Rahman, M. Shamsuzzoha, and MAH Siddiqi. "Changes of organic phosphorus in river waters in northern Bangladesh." International Journal of Agricultural Research, Innovation and Technology 5, no. 2 (January 4, 2016): 31–36. http://dx.doi.org/10.3329/ijarit.v5i2.26267.

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The variability in phosphorus concentrations and the decomposition rates of organic phosphorus were measured in five selected rivers through four surveys in July and November of 2012, and February and May of 2013. After collection the water samples were incubated for 20 days in a dark incubator and the change of forms of phosphorus such as particulate organic phosphorus (POP), dissolved organic phosphorus (DOP) and dissolved inorganic phosphorus (DIP) were analyzed. By fitting the changes to two types of models, the decomposition rates of organic phosphorus were determined. The mean total orga

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Brodie, Jon E., and Alan W. Mitchell. "Nutrients in Australian tropical rivers: changes with agricultural development and implications for receiving environments." Marine and Freshwater Research 56, no. 3 (2005): 279. http://dx.doi.org/10.1071/mf04081.

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In tropical Australia, intensive studies of river suspended sediment (SS) and nutrient dynamics have been restricted to streams on the north-east coast between the Fitzroy and Normanby Rivers (Queensland), Magela Creek/East Alligator River (Northern Territory) and the Ord River (Western Australia). Historical conditions in these rivers were probably characterised by low–moderate SS concentrations and low concentrations of dissolved inorganic nitrogen and phosphorus in flow events. Introduction of agriculture has transformed SS and nutrient dynamics. Grazing has led to soil erosion and increase

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Gusarov, A. V., and L. F. Maksyutova. "The main regularities of the ratio between riverbed and basin components of erosion and suspended sediment yield in river basins of the USA." Geomorphology RAS, no. 1 (April 4, 2019): 3–24. http://dx.doi.org/10.31857/s0435-4281201913-24.

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Suspended sediment yield is one of the objective and sufficiently accurate measures of erosion intensity in river basins. In first approximation, it can be divided into the riverbed component –r(rb), the products of vertical and horizontal riverbed deformations), and basin component – r(bas), the products of soil and gully erosion. An attempt was made to distinguish this erosion structure in the USA river basins based on the partition of suspended sediments of 224 rivers (based on the data from the US Geological Service on the average monthly water discharges and suspended sediment yields) acc

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Deng, Guangyi, Xiaohan Yao, Haibo Jiang, Yingyue Cao, Yang Wen, Wenjia Wang, She Zhao, and Chunguang He. "Study on the Ecological Operation and Watershed Management of Urban Rivers in Northern China." Water 12, no. 3 (March 24, 2020): 914. http://dx.doi.org/10.3390/w12030914.

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Small- and medium-sized rivers are facing a serious degradation of ecological function in water resource-scarce regions of Northern China. Reservoir ecological operation can restore the damaged river ecological environment. Research on reservoir ecological operation and watershed management of urban rivers is limited in cold regions of middle and high latitudes. In this paper, the urban section of the Yitong River was selected as the research object in Changchun, Northern China. The total ecological water demand and reservoir operation water (79.35 × 106 m3 and 15.52 × 106 m3, respectively) we

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Baumgarten, Elisheva. "Daily Commodities and Religious Identity in the Medieval Jewish Communities of Northern Europe." Studies in Church History 50 (2014): 97–121. http://dx.doi.org/10.1017/s0424208400001674.

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The Hebrew chronicle written by Solomon b. Samson recounts the mass conversion of the Jews of Regensburg in 1096.’ The Jews were herded and forced into the local river where a ‘sign was made over the water, the sign of a cross’ and thus they were baptized, all together in the same river. The local German rivers play another role in the accounts of the turbulent events of the Crusade persecutions. They were also the place where Jews evaded conversion, drowning themselves in water, rather than being baptized by what the chronicles’ authors call the ‘stinking waters’ of Christianity. Reading thes

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Milburn, David, and Terry D. Prowse. "The Effect of River-Ice Break-Up on Suspended Sediment and Select Trace-Element Fluxes." Hydrology Research 27, no. 1-2 (February 1, 1996): 69–84. http://dx.doi.org/10.2166/nh.1996.0020.

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Ice break-up on northern rivers presents a unique research challenge because of its dynamic nature and complexity of physical, chemical and biological processes. Rapidly moving ice, ice jamming, flood levels, and enhanced flow velocities can produce significant sediment transport and trace-element fluxes. Systematic sampling for these parameters, however, is rarely conducted because of logistical difficulties. This paper discusses the magnitude and relative significance of sediment and trace-element fluxes during break-up of the Liard River in northern Canada. Historical data for the open-wate

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Chiu, Chun Yen, Wei Lun Lee, Chung Yi Chung, Hwa Sheng Gau, Wen Liang Lai, and Shao Wei Liao. "Distribution and Sources of PAH_S and Sediment Properties in Southern Taiwan." Advanced Materials Research 518-523 (May 2012): 1301–6. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.1301.

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Abstract. The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) and surface sediment properties were analyzed from 31 locations in Dapeng Bay and neighboring rivers (Kaoping River, Tungkang River and Lingbeng River), southern Taiwan. Principal component factor analysis (PCFA) was performed to explain the latent factors and spatial variations of sediment quality. And canonical discriminant analysis (CDA) was applied to identify the source of pollution of Dapeng Bay from neighboring rivers. The results show that the most important latent factors in Dapeng Bay and neighboring rivers on

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Orkhonselenge, Alexander, and Amgalan-Erdene Nyamjantsan. "Hydrogeochemical implications from Ider River in northern Mongolia." Mongolian Geoscientist, no. 47 (December 31, 2018): 45–52. http://dx.doi.org/10.5564/mgs.v0i47.1065.

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This study presents the hydrogeochemical implications resulted from Ider River, one of headwaters of Selenge River in northern Mongolia which is a main headwater of Lake Baikal in southeastern Russia, being included in a drainage basin of the North Arctic Ocean. Surface water and groundwater were collected and estimated with hydrogeochemical analyses of major ionic compositions in order to determine water quality in the catchment of Ider River in northern Mongolia. Result shows that the downstream of Ider River is more polluted than upstream of Ider River and Khunjil River, an inflow of the Id

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Berggren, M., P. Bengtson, A. R. A. Soares, and J. Karlsson. "Terrestrial support of zooplankton biomass in northern rivers." Limnology and Oceanography 63, no. 6 (July 20, 2018): 2479–92. http://dx.doi.org/10.1002/lno.10954.

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Gummer, William D., F. Malcolm Conly, and Frederick J. Wrona. "Northern Rivers Ecosystem Initiative: Context and Prevailing Legacy." Environmental Monitoring and Assessment 113, no. 1-3 (March 9, 2006): 71–85. http://dx.doi.org/10.1007/s10661-005-9097-1.

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Romakkaniemi, A., I. Perä, L. Karlsson, E. Jutila, U. Carlsson, and T. Pakarinen. "Development of wild Atlantic salmon stocks in the rivers of the northern Baltic Sea in response to management measures." ICES Journal of Marine Science 60, no. 2 (January 1, 2003): 329–42. http://dx.doi.org/10.1016/s1054-3139(03)00020-1.

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Abstract Since 1980, the abundance of wild Atlantic salmon has been monitored by means of catch records, adult counts, electrofishing and smolt trapping in six rivers flowing into the northern Baltic Sea. River abundance (spawners, parr and smolts) was compared with implemented large-scale and river-specific management measures and with natural factors potentially affecting abundance. Since the 1980s, the wild stocks have recovered in a synchronous cyclical pattern. The recovery occurred mainly in two jumps, first a sudden increase dating back to around 1990 and a second sharp rise in the late

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Islam, Md Rakeb-Ul, Daniel J. Schmidt, David A. Crook, and Jane M. Hughes. "Patterns of genetic structuring at the northern limits of the Australian smelt (Retropinna semoni) cryptic species complex." PeerJ 6 (May 3, 2018): e4654. http://dx.doi.org/10.7717/peerj.4654.

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Freshwater fishes often exhibit high genetic population structure due to the prevalence of dispersal barriers (e.g., waterfalls) whereas population structure in diadromous fishes tends to be weaker and driven by natal homing behaviour and/or isolation by distance. The Australian smelt (Retropinnidae:Retropinna semoni) is a native fish with a broad distribution spanning inland and coastal drainages of south-eastern Australia. Previous studies have demonstrated variability in population genetic structure and movement behaviour (potamodromy, facultative diadromy, estuarine residence) across the s

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Kelderman, P., and P. Batima. "Water quality assessment of rivers in Mongolia." Water Science and Technology 53, no. 10 (May 1, 2006): 111–19. http://dx.doi.org/10.2166/wst.2006.304.

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A study was made on the water quality of the rivers in Mongolia over the years 1949–1990 for the three river basins in the country. In most of the 72 monitoring stations, the water quality is governed by geological and hydrological characteristics; bicarbonate and calcium are the most abundant major ions. No significant trends were observed between river discharges and total dissolved solids contents. The sediment yields (expressed in the run-off of total suspended solids, TSS) were always low, viz. between 0.02 and 20 × 103 kg TSS/km2.yr. In general, the rivers in Mongolia showed low pollutio

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Papadakis, Emmanouil-Nikolaos, Aggeliki Tsaboula, Zisis Vryzas, Athina Kotopoulou, Katerina Kintzikoglou, and Euphemia Papadopoulou-Mourkidou. "Pesticides in the rivers and streams of two river basins in northern Greece." Science of The Total Environment 624 (May 2018): 732–43. http://dx.doi.org/10.1016/j.scitotenv.2017.12.074.

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Singh, Arvind, and R. Ramesh. "Contribution of Riverine Dissolved Inorganic Nitrogen Flux to New Production in the Coastal Northern Indian Ocean: An Assessment." International Journal of Oceanography 2011 (June 8, 2011): 1–7. http://dx.doi.org/10.1155/2011/983561.

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Rivers are known to be one of the major sources of dissolved inorganic nitrogen (DIN) to the coastal ocean and contribute to the primary productivity in the sunlit upper ocean. This study provides an analysis of DIN fluxes and its possible contribution to new production in the coastal northern Indian Ocean based on the literature data. Most of the riverine DIN flux (~81% in the case of the Arabian Sea and 96% in the case of the Bay of Bengal) is not transported to the coastal ocean and is consumed on the course of the rivers or in the estuaries. Coastal Bay of Bengal and Arabian Sea receive ~0

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McCormick, Stephen D., Richard A. Cunjak, Brian Dempson, Michael F. O'Dea, and Judith B. Carey. "Temperature-related loss of smolt characteristics in Atlantic salmon (Salmo salar) in the wild." Canadian Journal of Fisheries and Aquatic Sciences 56, no. 9 (September 1, 1999): 1649–67. http://dx.doi.org/10.1139/f99-099.

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Atlantic salmon (Salmo salar) that had previously been released as fry in tributaries of the Connecticut River were captured from 1993 to 1997 during their normal spring smolt migration 198 km from the mouth of the river. Smolts had peak levels of gill Na+,K+-ATPase activity and salinity tolerance early in migration (early May), indicating physiological readiness to enter seawater. Significant decreases in gill Na+,K+-ATPase activity (29-66%) and salinity tolerance were seen in smolts at the end of the migratory period (late May and early June). Reduced gill Na+,K+-ATPase activity occurred ear

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Kraus, R., N. Supić, and R. Precali. "Factors favouring large organic production in the northern Adriatic: towards the northern Adriatic empirical ecological model." Ocean Science Discussions 12, no. 3 (June 25, 2015): 1219–62. http://dx.doi.org/10.5194/osd-12-1219-2015.

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Abstract. Influenced by one of the largest Mediterranean rivers, Po, the northern Adriatic production is highly variable seasonally and interannually. The changes are especially pronounced between winters and seemingly reflect on total Adriatic bioproduction of certain species (anchovy). We analysed the long-term changes in the phytoplankton production at the transect in the region, as derived from monthly oceanographic cruises, in relation to concomitant geostrophic currents distribution in the area and in the Po River discharge rates in days preceding the cruises. In winter and early spring

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