Stable Isotopes for Nitrate Source Identification
Stable isotopes as indicators of nitrate attenuation across landscapes
... isotopic source signature for sewage-N could not be constrained, the dominance of this nutrient source in the river system was clearly identified as it drove in-situ denitrification, resulting in ...
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Risk assessment and source identification of coastal groundwater nitrate in northern China using dual nitrate isotopes combined with Bayesian mixing model
... dominant nitrate source of these groundwater samples might be NH 4 C fer- tilizers that underwent processes such as volatilization and nitrification (Yuan et ...). Nitrate concentrations of Group C ...
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Identification of Recharge Controls For Groundwater Aquifer System By Stable Water Isotopes
... C isotopes, the findings can be drawn: groundwater originating from a spring has a different origin, where one originated from groundwater from the local water company (PDAM) well water source, and the ...
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Identification Of A Regionally Coherent Subseasonal Signal Of Stable Isotopes In Tropical Andean Precipitation
... precipitation isotopes (δD, δ 18 O) demonstrates that they are recording a region-wide synoptic ...in isotopes preserved in tropical Andean ice reflect regional circulation anomalies and that ice cores ...
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Nitrate source history for Livermore, California using environmental isotopes, noble-gases, and major ions
... Oxygen isotope values of nitrate can help clarify source identification, especially to separate nitrate fertilizer input from other sources, which produce nitrate by nitrification of amm[r] ...
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Combining stable isotopes with contamination indicators : a method for improved investigation of nitrate sources and dynamics in aquifers with mixed nitrogen inputs
... artificial diffuse sources were ubiquitous, groundwater samples were first classified according to a combination of two indicators relevant of point source contamination: presence/abse[r] ...
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Modelling stable water isotopes: Status and perspectives
... Such tagging experiments allow an explicit decomposition of precipitated water at a certain location into the contributions of di ff erent source regions and the influence of the di ff erent sources on the over- all ...
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Utilization of nitrate stable isotopes of Chydorus sphaericus (OF Müller) to elucidate the hydrological characteristics of riverine wetlands in the Nakdong River, South Korea
... disturbance. Inlet and outlet deterioration and continuous inflow of sewage accelerate pollutant enrichment in wet- lands and influence the growth and distribution of bio- logical factors. Nevertheless, information about ...
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Effects of changes in moisture source and the upstream rainout on stable isotopes in precipitation – a case study in Nanjing, eastern China
... daily stable isotopic composition (δ 18 O) in precipitation from Septem- ber 2011 to November 2014 in Nanjing, eastern ...moisture source loca- tion and rainout processes in the source ...the ...
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Stable isotopes of nitrate reveal different nitrogen processing mechanisms in streams across a land use gradient during wet and dry periods
... primary source of NO − 3 to the streams while SOM, in addition to inorganic fertiliser was also a domi- nant source of NO − 3 during the dry ...3 isotopes in a region with highly variable and un- ...
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Stable vanadium isotopes as a redox proxy in magmatic systems
... depleted source with a lighter initial V isotope composition than the MORB source, it is therefore possible that the competing effects of source depletion and Cr-spinel fractionation result in ...
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Stable isotopes and diet: You are what you eat
... excavations) and the Programme for Belize (Fred Valdez/Richard Adams excavations). In conjunction with data published by others, a chronological trend towards increasing maize reliance is evident both in bone collagen ...
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Carbon and Nitrogen stable isotopes as biomarkers for food traceability
... Stable isotope analysis (S.I.A.) by isotope ratio mass spectrometry (I.R.M.S.) is a key tool for alimentary traceability thanks to its potential for the reconstruction of animal diets using the isotopic values of ...
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Utilizing Stable Isotopes and Spatial Analysis to Understand Hillslope Ecohydrological.
... At each time step, a call is made to the PostgreSQL database for the set of ground- water well δ 2 H and δ 18 O values at each well XY coordinate. These values are passed to R and converted to a spatial data frame for ...
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Continual in situ monitoring of pore water stable isotopes in the subsurface
... sampling results obtained from different methods and modes of operation with each other (Fig. 4). In all cases, random de- viations appear dominant, while biases are small. The inter- method SD and RMSE are on the order ...
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Spatial distribution of stable water isotopes in alpine snow cover
... of stable water isotopes in precipita- tion is a well-known effect since the benchmark paper of Dansgaard ...heavy isotopes with altitude and can also be observed in fresh ...heavy isotopes ...
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Using stable isotopes of water to infer wetland hydrological dynamics
... water source cannot be determined; however, waters derived from precipitation should predominate near the surface, whilst following flood events, the river should be the main water source in the riparian ...
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Can oxygen stable isotopes be used to track precipitation moisture
... Oxygen stable isotope ratios have therefore been frequently used as a source of palaeoclimate data from a variety of proxy archives, which integrate this signal over ...the source water used in ...
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Giant Beaver (Castoroides) Palaeoecology Inferred from Stable Isotopes
... Palaeoecology of Castoroides Castoroides bone 13 C col and δ 15 N col support the hypothesis that giant beavers were semi-aquatic rodents that grazed predominantly on macrophytes. A strong preference for submerged ...
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Using Stable Carbon and Nitrogen Isotopes to Evaluate Parrotfish Diet
... Table 3 summarizes the possible long-term and recent dietary carbon sources of the sampled parrotfish which were identified based on 0-1‰ theoretical enrichment in the δ C values in the fish tissues compared to the 13 ...
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