dissolved organic carbon exports in rivers and streams

... Trang 1Dissolved Organic Carbon Mobilisation in a Groundwater System Stressed by Pumping P W Graham, A Baker & M S Andersen The concentration and flux of organic carbon in aquifers is influenced ... of organic carbon in soil or sediment as measured by standard laboratory methods), DOC (portion of organic carbon [including chromophoric and fluorescent organic matter measured as FDOM] within ... Pumping Rates and sampling events n/a no pumping UTC–Coordinated universal time *abstraction ran until 3am on 19/04/2013 - indicates sampling within the same pumping period, for pump reading

Ngày tải lên: 24/11/2022, 17:42

... landscape influence using the proportion of wetlands in the watershed measured at different distances to predict dissolved organic carbon (DOC) concentrations in Wisconsin lakes and rivers, and ... production and leaching in ponded water in wetland-dominated catchments The DOC/discharge relationship may thus be a result of increasing DOC with increasing discharge in uplands, but decreasing concentrations ... 10Finally, there were differences in the extent of watershed influence for rivers and drainage lakes The proportion of wetlands in the landscape explained more of the variability in DOC of rivers

Ngày tải lên: 18/10/2022, 22:44

... dominant producers Organic N mineralization from remaining residue can increase soil inorganic N concentration (Kumar et al., 2018b) Shindo and Nishio (2005) noted that ~10% of organic N existing ... environment (air, water, and mineral soil), interacting as a system Ecosystems include both living and nonliving components These living, or biotic, components include habitats and niches occupied ... communities and fungi dominate the latter stage (Marschner et al., 2011) Naresh et al., (2017) determined that reducing tillage and maintaining surface residues in a long-term study increased soil organic

Ngày tải lên: 12/03/2020, 21:56

... sustain crop productivity Soil organic carbon plays the crucial role in maintaining soil quality The impact and rate of SOC sequestration in CA and conventional agriculture is still in investigation ... concentration in the macro-aggregate was increased by 13.5% in MP+S, 4.4% in NT-S and 19.3% in NT+S, and those in the micro-aggregate <0.25 mm were increased by 6.1% in MP + S and 7.0% in NT + S ... concentration in the macro-aggregate was increased by 13.5 % in MP + S, 4.4 % in NT-S and 19.3 % in NT + S, and those in the micro-aggregate (<0.25 mm) were increased by 6.1% in MP + S and 7.0 % in NT

Ngày tải lên: 28/09/2020, 17:41

... processes and potential groundwater mixing Anions (SO42− and NO3−) were also measured to provide insights into anaerobic processes deep in the aquifer and δ 13C of dissolved inorganic carbon (δ ... ground surface18 There are insufficient baseline CH4 data of near-surface ambient air and dissolved gas in groundwater within the Condamine Catchment19–21, and our understanding of the extent of hydraulic ... mixing to be apparent They did not examine [DOC], CH4 concentration [CH4] or isotopic compo-sition (δ 13C-CH4) within the groundwater Another study in the region, using 3H, dissolved inorganic carbon

Ngày tải lên: 19/11/2022, 11:38

... atmospheric carbon dioxide in soils1–3 Understanding the variation and predicting the dynamics of carbon stocks in soil following organic amendment application require a thorough understanding of ... and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China 2 School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China ... aliphatic-C mainly in the intra-aggregate fraction in organic C poor soils19 Compared with organic molecules accumulation in particle size and density fractions (primary organo– mineral complexes in bulk

Ngày tải lên: 19/11/2022, 11:41

... responses during the acid exposure and recovery periods (Figs 1 and 3) DOC appears to maintain the coupling of Na+ uptake to ammonia excretion in zebrafish during and after exposure to low pH in ion-poor ... Physiological action of dissolved organic matter in rainbow trout in the presence and absence of copper: sodium uptake kinetics and unidirectional flux rates in hard and softwater Aquat Toxicol ... Dixon, D G Copper and cadmium binding to fish gills: modification by dissolved organic carbon and synthetic ligands Can J Fish Aquat Sci (1993). 10 Campbell, P., Twiss, M & Wilkinson, K Accumulation

Ngày tải lên: 24/11/2022, 17:42

... Chair Civil and Environmental Engineering Mark R Wiesner, Professor, 7 Civil and Environmental Engineering Cher An Mar Clarence A Miller, Professor, Chemical and Biomolecular Engineering HOUSTON, ... particles and their interactions with other environmental contaminants The adsorption and desorption of naphthalene and 1,2-dichlorobenzene, two common organic contaminants, with nCo in water was investigated ... through incomplete combustion of either plants or fossil fuels(Setton, Bernier et al 2002) All of these carbon materials contain stacks of six- carbon aromatic rings Instead of having six-carbon ring

Ngày tải lên: 14/11/2014, 09:31

... 1FOULING AND ACCUMULATION OF DISSOLVED ORGANIC MATTER IN MEMBRANE BIOREACTORS LIANG SHUANG NATIONAL UNIVERSITY OF SINGAPORE 2007 Trang 2FOULING AND ACCUMULATION OF DISSOLVED ORGANIC MATTER IN ... production, and smaller plant size However, membrane fouling remains the principal obstacle constraining their more extensive and large-scale application Dissolved organic matter (DOM), mainly soluble ... role of DOM in both reversible and irreversible fouling iv) To investigate the composition, characteristics, and fouling potential of DOM both in the MBR and in the effluent during MBR operation

Ngày tải lên: 14/09/2015, 11:16

... At low carbon contents, an increase in carbon content led to an increase in water retention in coarse soils and to decrease in water retention in fine-textured soils whereas, at high carbon contents, ... loamy sand and sandy loam soils The soil moisture at field capacity (FC) increased with increase in fine fractions of the soils (0-15 and 15-30 cm depth) and had significant and positive linear ... permanent wilting point, Soil organic carbon Accepted: 20 March 2019 Available Online: 10 April 2019 Article Info Trang 2Introduction India is an agrarian country and about 60% of the Indian

Ngày tải lên: 09/01/2020, 20:52

... and below ground or recalcitrant organic and inorganic carbon in soils and deeper subsurface environments Soil organic carbon (SOC) is the carbon held within soil organic constituents (i.e., products ... mapping survey The study was conducted during 2010-12 in the state of Uttarakhand by Soil and Land Use Survey of India (SLUSI) using guidelines developed for Soil Resource Mapping The area of interest ... physiography, altitude and land-use/cover collected randomly along the road side taking in to account remoteness/inaccessibility of region Carbon accounting making use of stratified random sampling has the

Ngày tải lên: 13/01/2020, 06:57

... activities help in maintaining the soil ecosystem function by degrading soil organic matter, catalyzing the biochemical reactions involved in nutrient cycling and energy transfer (Sinsabaugh et ... to zero increased the levels of MBC and MBN (36-82 and 29-104% over control, respectively This increase (28% in of C and 33% N) was maximum in MT+R and minimum (10% for C and N both) in minimum ... total carbon and and clay + silt content, but there was an increase in the soil carbon stored in <20 μm size fraction with an increase in clay+ silt content Gabarron Galeote et al., (2015) and

Ngày tải lên: 17/03/2020, 20:01

... terrestrial vegetation Soil C pool comprises soil organic carbon (SOC) and soil inorganic carbon (SIC) pool (Lal, 2004) Soil organic carbon and carbon sequestration builds soil fertility, improves ... monsoon during kharif (July) resulted in delayed sowing of kharif crops The rainfall received during rabi season mainly during October and November was 152.2 mm and the October rainfall was ... reactive N in fumigated soil - Ninhydrin reactive N in unfumigated soil MBC g of soil = - x 24 Weight of soil sample Ninhydrin reactive N in fumigated soil - Ninhydrin reactive N in unfumigated

Ngày tải lên: 15/05/2020, 12:13

... reported that continuous cropping and integrated use of organic and inorganic fertilizers increased soil C sequestration and crop yields Organic Carbon (O C.) The organic carbon was significantly ... fractions and crop yield Improved understanding of active pools of soil organic carbon will provide valuable information for establishing sustainable fertilizer management systems to maintain and enhance ... to initial status Khan and Wani (2017) reported that significant build-up of soil microbial biomass carbon (SMBC) were maintained under FYM and integrated nutrient management involving FYM and

Ngày tải lên: 29/05/2020, 17:36

... results as soil organic carbon rather than as soil organic matter (Baldock and Skjemstad 1999) Inorganic Soil Carbon Significant amounts of inorganic carbon can occur in soils especially in more arid ... biologically mineralization did increase with increasing cropping intensity Under NT, stratification ratios of soil C and N pools also tended to increase with increasing cropping intensity The ... Meerut-250110, U.P., India *Corresponding author A B S T R A C T Soil organic carbon (SOC) and its fractions (labile and non-labile) including particulate organic carbon (POC) and its components

Ngày tải lên: 09/07/2020, 01:43

... particulate organic carbon (POC), dissolved organic carbon (DOC) and microbial biomass carbon (MBC) in organic manure plus inorganic fertilizer treatments (NP+S and NP+FYM) in 0–60 cm depth were increased ... porosity and water retention capacity Singh et al., (2014) reported that a significant increase in bulk density was observed in surface 0.05 m in sandy loam and 0.10 m in both loam and clay ... 41.3%, 32.9%, 28.1% and 17.9%, respectively, as compared to the CK treatment Organic manure plus inorganic fertilizer application also increased labile soil organic carbon pools in 0–60 cm depth

Ngày tải lên: 28/09/2020, 17:26

... [41]Rodin L.E., Bazilevich N.I., Production and mineral in terrestrial 1967, 288 pp cycling vegetation, Oliver and Boyd, Edinburgh, [46] Singh K.P., Litter production and nutrient turnover in deciduous ... con- siderably in depth, clay contents increasing with depth and is classified as Humic Acrisol [12] These and other soil characteristics are indicated in table III pine trees (Pinus sylvestris ... in the lower classes and no sampling in the upper classes The references found in the literature report conflicting data, depending on the forest species studied, the age of the stand, the kind...

Ngày tải lên: 08/08/2014, 14:21

... sand banks and sand ridges, including their origin, classification and modeling in continental shelf seas Among all types of natural sandy bed forms, dunes in alluvial rivers and sand waves in ... in fully shearing grain motion in water and about φ m = 26 o in partially shearing grain motion In his study on avalanching of granular solids on slopes, Allen (1970) measures the “angle of initial ... dunes and sand waves are explored by using a linear instability analysis approach The effects of wind waves on sand wave formation are investigated by means of a wave-current interaction model In...

Ngày tải lên: 11/09/2015, 09:11

... tion New tion ba ba bat bat incu incu incu incu 1st 2nd 3rd 4th Figure Change in amount of organic carbon on PAC for every incubation by glucose According to Sutherland (2001), extracellular polymers ... acid-water/acetonitrile in a 40/60 ratio, and flow rate of 0.8 ml/min (Barbeni et al., 1987) MLSS was determined following to the Standard Methods for Examination of Water and Wastewater (APHA, ... 3,5-DCP concentrations in the PACT and the control reactors during and after the shock loading of 3,5-DCP The peak concentration in the PACT and the control reactors were 6.0 and 45.3 mg l-1, respectively...

Ngày tải lên: 05/09/2013, 08:40

... Biodegradation; Dissolved organic matter; DOC Introduction In the past 10 years, much progress has been made in the understanding of dissolved organic matter (DOM) functions and dynamics in soils Today, ... bacterial interaction on beech leaves: influence on decomposition and dissolved organic carbon quality Soil Biol Biochem 31, 367 – 374 Moore, T.R., 1997 Dissolved organic carbon: sources, sinks, and ... bacterial inocula for measuring the biodegradable dissolved organic carbon (BDOC) in waters Water Res 26, 481 – 486 Boissier, J.M., Fontvieille, D., 1993 Biodegradable dissolved organic carbon in seepage...

Ngày tải lên: 15/03/2014, 23:22