Soil redistribution rate and its relationship with soil organic carbon and total nitrogen using 137Cs technique in a cultivated complex hillslope in western Iran

Afshar, Farideh Abbaszadeh; Ayoubi, Shamsollah; Jalalian, Ahmad

doi:10.1016/j.jenvrad.2010.03.008

Cited by 90 publications

(42 citation statements)

References 29 publications

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“…However, our study, as well as Fulajtar (2003), Bujan et al (2003) and Afshar et al (2010) for Slovakia, Argentina and Iran suggested weak relations of soil redistribution rates with slope gradient and curvature. In our study area, soil redistribution may be more influenced by slope length as well as disturbance by the shelterbelts and ephemeral gullies (Figs.…”

Section: Discussioncontrasting

confidence: 43%

Using 137Cs technique to quantify soil erosion and deposition rates in an agricultural catchment in the black soil region, Northeast China

Fang

Sun

et al. 2012

Geomorphology

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Section: Discussioncontrasting

confidence: 43%

Using 137Cs technique to quantify soil erosion and deposition rates in an agricultural catchment in the black soil region, Northeast China

Fang

Sun

et al. 2012

Geomorphology

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“…110 mm per year, whereas in the semiarid regions in western Iran precipitation exceeds 600 mm yr -1 . The mean values of 137 Cs inventory and % loss of 137 Cs at the studied sites as compared to the mean value of 137 Cs inventory at the reference site are given in (Figure 2) (Walling and Quine, 1990;Afshar et al, 2010). While in the disturbed soils, the 137 Cs activity profiles exhibited deviation to varying degrees ( Figure 3).…”

Section: Resultsmentioning

confidence: 97%

“…137 Cs fallout reaches the earth's surface mostly as a result of precipitation and is strongly and is rapidly adsorbed by fine soil colloidal particles such as clay minerals and organic matter in the topsoil. Chemical or biological removal of 137 Cs from soil particles is limited and it is assumed that only physical processes that result in moving soil particles such as soil erosion and tillage particle are involved in the 137 Cs transport (Afshar et al, 2010;Rahimi et al, 2013). Zhang et al (2007) used 137 Cs tracer in tunnel to test the erodibility of soils in Tibet.…”

Section: Introductionmentioning

confidence: 99%

Using Cesium-137 to estimate soil particle redistribution by wind in an arid region of central Iran

Gheysari

Ayoubi

Abdi

2016

EJSS

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Article Info Received : 28.01.2016 Accepted : 01.04.2016 This study was conducted to estimate soil erosion and deposition rates along a transect using 137 Cs technique in an arid of Isfahan Province, central Iran. Sixteen sites along a northeast-southwest transect with 42 km length were used. Eighty soil samples collected from five depths (0-5, 5-10, 10-20, 20-30, 30-50 cm) were analyzed for 137 Cs concentration. Additional 20 soil samples were collected from the reference site for computing soil loss and deposition using 137 Cs measurement. The results showed that the northern part of the transect showed erosion rates ranging from12.90 to 46.86 t ha -1 yr -1 . The major factor affecting soil erosion process in northern part of the studied transect is associated dominantly with occurrence of improper gypsum mining operations and human activities. In the southern part of the transect deposition rates changed between 3.10 -7.44 t ha -1 yr -1 , presumably influenced by increasing plant cover. Significant correlations between 137 Cs and magnetic susceptibility, soil organic matter (SOM), total nitrogen (TN) and particle size distributions indicated that soil redistribution by wind erosion might have modified the soil properties along the studied transect. A multiple linear regression model was developed for estimating 137 Cs by frequency dependence (χfd), TN, clay and sand contents which explained about 87% of the 137 Cs variability. This study of using 137 Cs to assess wind erosion is unique in the arid region of central Iran and had significant implications for further research.

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“…Some research focuses on the event-based lateral fluxes of soil and SOC and more rarely its associated short-term C effluxes to the atmosphere (Bremenfeld et al, 2013;Van Hemelryck et al, 2010a, 2010bWang et al, 2014), while other studies use long-term patterns in SOC in conjunction with long-term erosion studies, mostly based on erosion tracers (e.g. 137 Cs) or soil truncation, to evaluate the long-term effect of erosion on the C balance (Afshar et al, 2010;Doetterl et al, 2013;Martinez et al, 2010;Quine and Van Oost, 2007). Catchment scale patterns in SOC distributions are also the basis for developing and testing coupled soil erosion and C turnover models Van Oost et al, 2005a).…”

Section: Introductionmentioning

confidence: 99%

Erosion-induced carbon redistribution, burial and mineralisation — Is the episodic nature of erosion processes important?

Fiener

Dlugoß

Oost

2015

CATENA

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a b s t r a c tThere is still an ongoing scientific discussion regarding the importance of erosion-induced lateral soil organic carbon (SOC) redistribution for the burial and/or mineralisation of carbon and the resulting long-term C balance at the catchment scale. Especially the effects of the event driven nature of water erosion and the potentially associated enrichment of SOC in sediment delivery are still unclear. In general, two processes lead to enrichment of SOC: (i) enrichment due to selective interrill erosion at erosion sites, and (ii) enrichment due to selective depletion at deposition sites. In this study, the conceptual soil erosion and SOC turnover model SPEROS-C was adapted to integrate these processes and applied in a small arable catchment (4.2 ha) in Germany for a 57-year period. A total number of 901 model runs were performed with different realisations of frequency and magnitude of water erosion as well as realisations of enrichment and depletion ratios taken from literature and compared to a reference model run representing mean annual erosion without enrichment processes. In general, our modelling study indicates that ignoring temporal variability and enrichment processes may lead to a substantial misinterpretation of erosion-induced C fluxes. Especially the vertical C flux (difference between C inputs from plant assimilates and organic fertilizer and SOC mineralisation) at deposition sites strongly depends on the model parameterisation ranging from a maximum C source of −336 g C m −2 to a maximum C sink of 44 g C m −2 . In combination with a substantially higher C export due to enrichment processes, the overall C balance of the catchment potentially turns into a maximum C source of −44 g C m −2 at the end of the simulation period compared to a C source of −1 g C m −2 for the reference run.

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Soil redistribution rate and its relationship with soil organic carbon and total nitrogen using 137Cs technique in a cultivated complex hillslope in western Iran

Cited by 90 publications

References 29 publications

Using 137Cs technique to quantify soil erosion and deposition rates in an agricultural catchment in the black soil region, Northeast China

Using 137Cs technique to quantify soil erosion and deposition rates in an agricultural catchment in the black soil region, Northeast China

Using Cesium-137 to estimate soil particle redistribution by wind in an arid region of central Iran

Erosion-induced carbon redistribution, burial and mineralisation — Is the episodic nature of erosion processes important?

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