Готові списки джерел за темами / Magela Creek

Добірка наукової літератури з теми "Magela Creek"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Зміст

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Magela Creek".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Magela Creek"

1

Hart, BT, EM Ottaway, and BN Noller. "Magela Creek system, Northern Australia. II. Material budget for the floodplain." Marine and Freshwater Research 38, no. 6 (1987): 861. http://dx.doi.org/10.1071/mf9870861.

Повний текст джерела
Анотація:
A materials budget was estimated for the Magela Creek system during the 1982-83 wet season. This tropical system in northern Australia consists largely of a well-defined creek (Magela Creek contributes approximately 50% of the total inflow to the floodplain) flowing into an extensive wetlands area and then into the East Alligator River. Intensive sampling of creek water, rainfall and water flowing from the system provided the data base for the budget calculations. The annual transport of both dissolved and particulate matter by Magela Creek (area 600 km2) is very low, even when compared with other low-relief tropical systems. The annual load transported during 1982-83 was 1260 t (21 kg ha-1) of dissolved salts and 2330 t (39 kg ha-1) of particulate matter. Rainfall appeared to contribute all the sodium, potassium and chloride, and part of the calcium (c. 30%) and magnesium (25%) transported during the 1982-83 wet season by Magela Creek. Most of the manganese (c. 60%) (and probably iron) was contributed from weathering processes occurring in the catchment. Only small amounts of the trace metals copper, lead, zinc and uranium were transported by the creek. During the 1982-83 wet season, more trace metals were contributed in rainfall than transported from the catchment by the creek. However, this is probably atypical and resulted from dust particles that had entered the atmosphere in greater numbers due to the extended dry season. The vast bulk of the nutrients (total P 93%, NO3- N 86%, NH4+ N 98%) added to the catchment by rainfall was removed by the catchment, probably via uptake by the vegetation. Consequently, the creek transported only very small amounts of nutrients to the floodplain. An input-output budget for the Magela floodplain was calculated. The uncertainty in the net amounts deposited or released from the floodplain was estimated using a new quantitative method developed for this purpose. The uncertainties in the net values estimated were high, ranging from around 30% for bicarbonate to 500% for uranium. These data suggest that the Magela floodplain is a net source of the major ions (sodium, potassium, calcium, magnesium, chloride, sulfate and bicarbonate) and also of iron, and a net sink for suspended solids, nutrients (total phosphorus, nitrate and ammonia) and manganese. The floodplain also appears to be a net sink for the trace metals copper, lead, zinc and uranium.
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Erskine, W. D., M. J. Saynor, K. Turner, T. Whiteside, J. Boyden, and K. G. Evans. "Do suspended sediment and bedload move progressively from the summit to the sea along Magela Creek, northern Australia?" Proceedings of the International Association of Hydrological Sciences 367 (March 3, 2015): 283–90. http://dx.doi.org/10.5194/piahs-367-283-2015.

Повний текст джерела
Анотація:
Abstract. Soil erosion rates on plots of waste rock at Ranger uranium mine and basin sediment yields have been measured for over 30 years in Magela Creek in northern Australia. Soil erosion rates on chlorite schist waste rock are higher than for mica schist and weathering is also much faster. Sediment yields are low but are further reduced by sediment trapping effects of flood plains, floodouts, billabongs and extensive wetlands. Suspended sediment yields exceed bedload yields in this deeply weathered, tropical landscape, but the amount of sand transported greatly exceeds that of silt and clay. Nevertheless, sand is totally stored above the topographic base level. Longitudinal continuity of sediment transport is not maintained. As a result, suspended sediment and bedload do not move progressively from the summit to the sea along Magela Creek and lower Magela Creek wetlands trap about 90.5% of the total sediment load input.
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Hart, BT, BN Noller, C. Legras, and N. Currey. "Manganese speciation in Magela Creek, northern Australia." Marine and Freshwater Research 43, no. 2 (1992): 421. http://dx.doi.org/10.1071/mf9920421.

Повний текст джерела
Анотація:
The speciation of Mn has been studied in Magela Creek, a tropical river in northern Australia containing water characterized by low pH, high temperature and extremely low ionic strength. Low concentrations (about 2-5�g L-1) of soluble Mn (i.e. filtration size <0.02�m) are typically found in these waters during the wet season, the main natural sources apparently being rainwater and groundwater. An additional source of soluble Mn has been identified, possibly being seepage from a mine retention pond. Rather surprisingly, the concentration of colloidal Mn (0.4-0.02�m) was almost three times higher than that of soluble Mn and was correlated with it. The primary process controlling the concentration of soluble Mn in this system appears to be rapid adsorption of soluble Mn to existing colloidal matter, followed by slower transfer of part of this surface-bound Mn to the interior of the colloid. Colloidal Mn is postulated to have a particularly long lifetime in this system because the removal process (aggregation to form particulate Mn) would be slow due to the extremely low concentrations of Ca and Mg ions during the wet season. A mixing experiment, undertaken to provide information on the possible fate of Mn in a mine retention pond if this wastewater should be discharged to the creek, clearly showed that Mn would be rapidly removed from the water column via colloidal and particulate forms. The precise mechanism was shown to be complex, depending upon the amount and characteristics of the colloidal and particulate matter present at the time of discharge, the changes in the Ca and Mg concentrations (which would influence the rate of aggregation), and the amount of turbulence in the creek.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Erskine, Wayne D., M. J. Saynor, J. M. Boyden, and K. G. Evans. "Sediment fluxes and sinks for Magela Creek, Northern Territory, Australia." Marine and Freshwater Research 69, no. 7 (2018): 1018. http://dx.doi.org/10.1071/mf16107.

Повний текст джерела
Анотація:
Sediment fluxes and sinks based on total sediment load for Magela Creek in the Australian wet–dry tropics have been constructed from detailed measurements of stream suspended sediment (turbidity and suspended sand) and bed load for the 10-year period, 2001–2002 to 2010–2011. This work shows that the sediment trap efficiency of the vegetated wetlands on lower Magela is high at ~89.5%. Sediment fluxes are the lowest in the world because of low soil erosion rates and because upstream floodplains and downstream wetlands trap and store sediment. Bedload yields are less than suspended sediment yields, but the amount of silt and clay is much less than the amount of sand (suspended sand and bedload). All sand is stored upstream of the East Alligator River. Downstream connectivity of sediment movement does not occur. Therefore, sediment moves discontinuously from the upper to the lower catchment.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Tait, Russell D. "Macroinvertebrate communities of Magela Creek billabongs, Northern Territory, Australia." SIL Proceedings, 1922-2010 23, no. 2 (August 1988): 1080–84. http://dx.doi.org/10.1080/03680770.1987.11899771.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Outridge, PM. "Seasonal and spatial variations in benthic macroinvertebrate communities of Magela Creek, Northern Territory." Marine and Freshwater Research 39, no. 2 (1988): 211. http://dx.doi.org/10.1071/mf9880211.

Повний текст джерела
Анотація:
This study examined seasonal and spatial patterns of benthic macroinvertebrate communities in four billabongs and a perennial stream riffle in the Magela Creek catchment, Northern Territory. Chironomids, coleopterans, trichopterans and hydracarina were the most diverse and abundant taxa, although the mussel Velesunio angasi contributed over 98% of total standing crop in most billabongs. Diversity and standing crop were usually higher in littoral than in profundal areas of two shallow billabongs, probably because of the presence of macrophytes. Diversity, abundance and biomass declined sharply over the dry season, from maxima in May-July to minima in December. Recovery in the early wet season was rapid, commencing after the first creek flows in December. The decline and recovery were closely associated with the availability of sediment organic matter, which reflected inputs of mainly allochthonous (terrestrial) detritus over the wet season followed by losses due to intense microbial breakdown. Microbial respiration also seemed related to declines in benthic communities in the latter half of the wet season, by producing hypolimnetic anoxia during periods of reduced creek flow.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Hart, BT, EM Ottaway, and BN Noller. "Magela Creek system, northern Australia. I. 1982-83 wet-season water quality." Marine and Freshwater Research 38, no. 2 (1987): 261. http://dx.doi.org/10.1071/mf9870261.

Повний текст джерела
Анотація:
The particularly late wet season in 1982-83 provided a unique opportunity to study the dry-to-wet season transition in Magela Creek, a tropical creek and wetlands system in northern Australia. The first water to flow down and across the floodplain was characteristically quite acidic (pH c. 4-5), with a high conductivity (c. 750 �S cm-1) and high sulfate concentration (c. 200 mg I-1). The source of the sulfate, acidity and dissolved salts is groundwater brought to the surface (mainly in depressions on the floodplain, e.g. pools and channels) by rising watertables, and then flushed from these by the slowly advancing flood waters. The end of the dry season is a time of particular stress for the biota living in these billabongs, and many fish kills have been noted at around the time this 'first flush' water enters. In most years, this poor-quality water would be rapidly flushed out, in a few days at the most, from the billabongs by subsequent flood- flows down Magela Creek. However, in 1983, the next flood event did not occur until almost 1 month after the first flush had occurred. During the main wet season, the water transported by Magela Creek was slightly acidic (mean pH 5,2), with a very low conductivity (c. 5-17 �S cm-1) and low concentrations of suspended solids (c. 4-59 mg I-1), major ions and trace metals (iron, manganese, copper, lead, zinc, uranium). There was a general decrease in the mean concentration of each determin and with each succeeding flood event. This was most noticeable in the case of suspended solids and conductivity, and was attributed to an 'exhaustion effect' where greater amounts of suspended solids and soluble salts (in the upper soil layers) were available in the early part of the wet season. The composition of the creek water was very similar to that of rainwater falling in the catchment, with two major exceptions. First, the rainwater was considerably more acidic (pH 3.6-4.9), due mainly to the presence of weak organic acids such as formic and acetic acids. This acidic rainwater was partially neutralized by interaction with catchment soils. Second, the concentrations of all nutrients (total phosphorus, nitrate-nitrogen and ammonia-nitrogen) were considerably higher in the rainwater. There was a significant removal (over 90%) of phosphorus, ammonia and nitrate from the rainwater, probably due to uptake by the ground vegetation known to proliferate in the catchment during the wet season. Factor analysis indicated that dilution of the base flow, presumably by surface runoff of rainwater, was the dominant component during both the rising and falling stages of each flood event. Radionuclide activity in composite water samples taken over the five flood events revealed that the total activity of both 226Ra and 210Pb was low, with greater than 58% of both radionuclides being in filterable forms.
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Noller, Barry N., and Barry T. Hart. "Uranium in sediments from the Magela Creek catchment, northern territory, Australia." Environmental Technology 14, no. 7 (July 1993): 649–56. http://dx.doi.org/10.1080/09593339309385334.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Finlayson, C. M., I. D. Cowie, and B. J. Bailey. "Sediment seedbanks in grassland on the Magela Creek floodplain, northern Australia." Aquatic Botany 38, no. 2-3 (November 1990): 163–76. http://dx.doi.org/10.1016/0304-3770(90)90003-4.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Hart, B. T., E. M. Ottaway, and B. N. Noller. "Nutrient and trace metal fluxes in the Magela Creek system, Northern Australia." Ecological Modelling 31, no. 1-4 (May 1986): 249–65. http://dx.doi.org/10.1016/0304-3800(86)90067-0.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Дисертації з теми "Magela Creek"

1

Cappo, Michael. "Frogs as predators of organisms of aquatic origin in the Magela Creek system, Northern Territory /." Title page, contents and summary only, 1986. http://web4.library.adelaide.edu.au/theses/09SM/09smc249.pdf.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Streffon, Jenna C. "Magma Mixing and Dome Formation: Dacite of East Pass Creek, Colorado." Bowling Green State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1556705059361473.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Tang, Eng Hoo Joseph. "The Petrogenesis Of The Station Creek Igneous Complex And Associated Volcanics, Northern New England Orogen." Thesis, Queensland University of Technology, 2004. https://eprints.qut.edu.au/15902/1/Joseph_Tang_Thesis.pdf.

Повний текст джерела
Анотація:
The Station Creek Igneous Complex (SCIC) is one of the largest Middle-Late Triassic plutonic bodies in the northern New England Orogen of Eastern Australia. The igneous complex comprises of five plutons - the Woonga Granodiorite (237 Ma), Woolooga Granodiorite (234 Ma), Rush Creek Granodiorites (231 Ma) and Gibraltar Quartz Monzodiorite and Mount Mucki Diorite (227 Ma respectively), emplaced as high-level or epizonal bodies within the Devonian-Carboniferous subduction complex that resulted from a westward subduction along the east Australian margin. Composition of the SCIC ranges from monzogabbro to monzogranite, and includes diorite, monzodiorite, quartz monzodiorite and granodiorite. The SCIC has the typical I-type granitoid mineralogy, geochemistry and isotopic compositions. Its geochemistry is characteristics of continental arc magma, and has a depleted-upper mantle signature with up to 14 wt% supracrustal components (87Sr/86Srinitial = 0.70312 to 0.70391; Nd = +1.35 to +4.9; high CaO, Sr, MgO; and low Ni, Cr, Ba, Rb, Zr, Nb, Ga and Y). The SCIC (SiO2 47%-76%) has similar Nd and Sr isotopic values to island-arc and continentalised island-arc basalts, which suggests major involvement of upper mantle sourced melts in its petrogenesis. SCIC comprises of two geochemical groups - the Woolooga-Rush Greek Granodiorite group (W-RC) and the Mount Mucki Diorite-Gibraltar Quartz Monzodiorite group (MMD-GQM). The W-RC Group is high-potassium, calc-alkalic and metaluminous, whereas the MMD-GQM Group is medium to high potassium, transitional calc-alkalic to tholeiitic and metaluminous. The two geochemical groups of the SCIC magmas are generated from at least two distinct sources - an isotopically evolved Neoproterozoic mantle-derived source with greater supracrustal component (10-14 wt%), and an isotopically primitive mafic source with upper mantle affinity. Petrogenetic modeling using both major and trace elements established that the variations within respective geochemical group resulted from fractional crystallisation of clinopyroxene, amphibole and plagioclase from mafic magma, and late fractionation of alkalic and albitic plagioclase in the more evolved magma. Volcanic rocks associated with SCIC are the North Arm Volcanics (232 Ma), and the Neara Volcanics (241-242 Ma) of the Toogoolawah Group. The major and trace element geochemistry of the North Arm Volcanics is similar to the SCIC, suggesting possible co-magmatic relationship between the SCIC and the volcanic rock. The age of the North Arm Volcanics matches the age of the fractionated Rush Creek Granodiorite, and xenoliths of the pluton are found within epiclastic flows of the volcanic unit. The Neara Volcanics (87Sr/86Sr= 0.70152-0.70330, 143Nd/144Nd = 0.51253-0.51259) differs isotopically from the SCIC, indicating a source region within the HIMU mantle reservoir (commonly associated with contaminated upper mantle by altered oceanic crust). The Neara Volcanics is not co-magmatic to the SCIC and is derived from partial melting upper-mantle with additional components from the subducting oceanic plate. The high levels emplacement of an isotopically primitive mantle-derived magma of the SCIC suggest periods of extension during the waning stage of convergence associated with the Hunter Bowen Orogeny in the northern New England Orogen. The geochemical change between 237 to 227 Ma from a depleted-mantle source with diminishing crustal components, to depleted-mantle fractionate, reflects a fundamental change in the source region that can be related to the tectonic styles. The decreasing amount of supracrustal component suggests either thinning of the subduction complex due to crustal attenuation, leading to the late Triassic extension that enables mantle melts to reach subcrustal levels.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Tang, Eng Hoo Joseph. "The Petrogenesis Of The Station Creek Igneous Complex And Associated Volcanics, Northern New England Orogen." Queensland University of Technology, 2004. http://eprints.qut.edu.au/15902/.

Повний текст джерела
Анотація:
The Station Creek Igneous Complex (SCIC) is one of the largest Middle-Late Triassic plutonic bodies in the northern New England Orogen of Eastern Australia. The igneous complex comprises of five plutons - the Woonga Granodiorite (237 Ma), Woolooga Granodiorite (234 Ma), Rush Creek Granodiorites (231 Ma) and Gibraltar Quartz Monzodiorite and Mount Mucki Diorite (227 Ma respectively), emplaced as high-level or epizonal bodies within the Devonian-Carboniferous subduction complex that resulted from a westward subduction along the east Australian margin. Composition of the SCIC ranges from monzogabbro to monzogranite, and includes diorite, monzodiorite, quartz monzodiorite and granodiorite. The SCIC has the typical I-type granitoid mineralogy, geochemistry and isotopic compositions. Its geochemistry is characteristics of continental arc magma, and has a depleted-upper mantle signature with up to 14 wt% supracrustal components (87Sr/86Srinitial = 0.70312 to 0.70391; Nd = +1.35 to +4.9; high CaO, Sr, MgO; and low Ni, Cr, Ba, Rb, Zr, Nb, Ga and Y). The SCIC (SiO2 47%-76%) has similar Nd and Sr isotopic values to island-arc and continentalised island-arc basalts, which suggests major involvement of upper mantle sourced melts in its petrogenesis. SCIC comprises of two geochemical groups - the Woolooga-Rush Greek Granodiorite group (W-RC) and the Mount Mucki Diorite-Gibraltar Quartz Monzodiorite group (MMD-GQM). The W-RC Group is high-potassium, calc-alkalic and metaluminous, whereas the MMD-GQM Group is medium to high potassium, transitional calc-alkalic to tholeiitic and metaluminous. The two geochemical groups of the SCIC magmas are generated from at least two distinct sources - an isotopically evolved Neoproterozoic mantle-derived source with greater supracrustal component (10-14 wt%), and an isotopically primitive mafic source with upper mantle affinity. Petrogenetic modeling using both major and trace elements established that the variations within respective geochemical group resulted from fractional crystallisation of clinopyroxene, amphibole and plagioclase from mafic magma, and late fractionation of alkalic and albitic plagioclase in the more evolved magma. Volcanic rocks associated with SCIC are the North Arm Volcanics (232 Ma), and the Neara Volcanics (241-242 Ma) of the Toogoolawah Group. The major and trace element geochemistry of the North Arm Volcanics is similar to the SCIC, suggesting possible co-magmatic relationship between the SCIC and the volcanic rock. The age of the North Arm Volcanics matches the age of the fractionated Rush Creek Granodiorite, and xenoliths of the pluton are found within epiclastic flows of the volcanic unit. The Neara Volcanics (87Sr/86Sr= 0.70152-0.70330, 143Nd/144Nd = 0.51253-0.51259) differs isotopically from the SCIC, indicating a source region within the HIMU mantle reservoir (commonly associated with contaminated upper mantle by altered oceanic crust). The Neara Volcanics is not co-magmatic to the SCIC and is derived from partial melting upper-mantle with additional components from the subducting oceanic plate. The high levels emplacement of an isotopically primitive mantle-derived magma of the SCIC suggest periods of extension during the waning stage of convergence associated with the Hunter Bowen Orogeny in the northern New England Orogen. The geochemical change between 237 to 227 Ma from a depleted-mantle source with diminishing crustal components, to depleted-mantle fractionate, reflects a fundamental change in the source region that can be related to the tectonic styles. The decreasing amount of supracrustal component suggests either thinning of the subduction complex due to crustal attenuation, leading to the late Triassic extension that enables mantle melts to reach subcrustal levels.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Cappo, Michael. "Frogs as predators of organisms of aquatic origin in the Magela Creek system, Northern Territory." Thesis, 1986. http://hdl.handle.net/2440/110846.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.

Книги з теми "Magela Creek"

1

Woodland, D. J. Fish communities in sandy pools of Magela Creek, Alligator Rivers Region. Canberra: Australian Govt. Pub. Service, 1992.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Finlayson, C. M. Macrophyte vegetation of the Magela Creek flood plain, Alligator Rivers Region, Northern Territory. Canberra: Australian Government Publishing Service, 1989.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Julli, M. E. The taxonomy and seasonal population dynamics of some Magela Creek flood plain microcrustaceans (Cladocera and Copepoda). Canberra: Australian Govt., Pub. Service, 1986.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Webb, J. The nature of iron deposits in the freshwater mussel from Magela Creek and their role in uptake of radionuclides. S.l: s.n, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Noller, Barry N. Assessment of magnesium, sulphate and uranium levels in Georgetown and Magela Creeks near Ranger Mine during the 1991/92 wet season / Barry N. Noller and Peter H. Woods. S.l: s.n, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

R, Wasson, ed. Modern sedimentation and Late Quaternary evolution of the Magela Creek Plain. Canberra: Australian Government Pub. Service, 1992.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.

Частини книг з теми "Magela Creek"

1

Hess, L. L., and J. M. Melack. "Remote sensing of vegetation and flooding on Magela Creek Floodplain (Northern Territory, Australia) with the SIR-C synthetic aperture radar." In Aquatic Biodiversity, 65–82. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-007-1084-9_4.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Thuy, Tran Thi Thanh. "Slope Creep Instability in Krajang Lor Village, Magelang Regency, Central Java, Indonesia: Inducement and Developmental Prediction." In Springer Transactions in Civil and Environmental Engineering, 99–121. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4074-3_6.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Також вас можуть зацікавити розширені добірки на тему "Magela Creek" для конкретних типів джерел:
Статті в журналах
Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!

До бібліографії