Geochemistry of sediment moisture in the Badain Jaran desert: Implications of recent environmental changes and water-rock interaction

Jin, Li; Edmunds, W.M.; Lu, Zunli; Ma, Jinzhu

doi:10.1016/j.apgeochem.2015.09.006

Cited by 13 publications

(6 citation statements)

References 35 publications

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“…And the correlation between C sz and τ (Figure 6b) shows that while τ approaches zero, C sz approaches 4.5 mg/L, which is the weighted average value of precipitation. Thus, unlike observed in the Badain Jaran Desert (Jin et al, 2015) the correlation between C sz and τ does not favour the existence of additional sources of chloride in the aquifer other than that from precipitation. Using Equation ( 5) hence provides the possibility to validate recharge results estimated from the sz-CMB method.…”

Section: Validation Of Mass Balance Assumptionscontrasting

confidence: 65%

Study of groundwater recharge using combined unsaturated‐and saturated‐zone chloride mass balance methods

Jiang

Rao

Han

et al. 2023

Hydrological Processes

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Understanding groundwater recharge mechanisms is essential for reliable groundwater recharge estimation for sustainable groundwater resource assessment and management, especially in arid and semiarid areas. In this study, chloride, together with stable isotopes ( 18 O and 2 H), in 1-year rainfall, soil water from representative profiles, and groundwater samples, collected in the Ordos Plateau, northern China were analysed. Groundwater recharge was estimated using unsaturated-and saturated-zone chloride mass balance (CMB). An equation that describes the relationship between chloride concentrations in saturated zone water (C sz ) and soil water residence time (τ) was derived. With the help of the relationship, chloride concentrations in unsaturated zone water (C uz ) and in groundwater (C sz ) can be used to uncover water flow and chloride transport in the unsaturated zone. The relationship between C sz and C uz indicates that, the groundwater was recharged mainly by intense rainfall events. Small rainfall events did not lead to groundwater recharge but contributed to the flux of chloride to soil surface. Stable isotopic compositions of 18 O and 2 H provided corroborative evidence of the recharge processes. The relationship between C sz and τ indicates further that there is no source of chloride in the groundwater other than that from precipitation. Thus, C sz can give more reliable recharge estimates. C uz was influenced by heavy rainfall-induced runoff, run-on and bypass flow events and cannot give reliable recharge estimates. However, if used jointly with C sz , C uz can help to gain insights into recharge processes and yield groundwater recharge estimates with higher certainty. The outcomes of this study can assist for groundwater recharge investigation and assessment in regions where the assumptions and boundary conditions necessary for the correct application of the CMB method may not be met. K E Y W O R D S chloride mass balance, groundwater recharge, saturated zone, semiarid and arid areas, unsaturated zone 1 | INTRODUCTION Groundwater is an important water resource for both domestic and agricultural purposes. Due to climate changes (Berdugo et al., 2020; Huang et al., 2017) and anthropogenic pressures (Chen et al., 2019; Rulli et al., 2013), especially arid and semiarid areas are likely to experience increased water stress in the coming decades (Gleeson

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Section: Validation Of Mass Balance Assumptionscontrasting

confidence: 65%

Study of groundwater recharge using combined unsaturated‐and saturated‐zone chloride mass balance methods

Jiang

Rao

Han

et al. 2023

Hydrological Processes

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“…weak redox) conditions at suitable depths, leading to the production of CO 2 used for CaCO 3 formation. Free Ca 2+ ions could be derived from authigenic carbonates after in situ chemical weathering of soil primary silicate minerals such as feldspar, mica, amphibole and pyroxene (Dupraz, et al, 2005;Liu et al, 2011;Jin et al, 2015) due to low pH caused by organic matter decomposition and force-of-crystallization (Durand et al, 2010;Monger, 2014) and from the dissolution of in situ primary lithogenic carbonate rocks debris such as limestone and dolomite 15 / 28 (Sun et al, 2019b). The presence of free Ca 2+ and local alkaline conditions through seasonal upwelling of alkaline water followed by evaporation (Arp et al, 2003) could lead to the nucleation of calcium carbonate on the root organic matrix (Arp et al, 1999a, b).…”

Section: Diagenesis and Pedogenesis Of Rhizoliths In The Sand-sedimentary Environmentmentioning

confidence: 99%

Outcrop distribution and formation of carbonate rhizoliths in Badain Jaran Desert, NW China

Sun

Huguet

Zamanian

2021

CATENA

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Carbonate rhizoliths and related features are environmental and ecological indicators of not only palaeosols, but also modern soils. They designate subaerial vadose and pedogenic diagenesis environments. Rhizoliths are commonly used as a tool for paleoenvironmental reconstructions, but uncertainty remains regarding their formation mechanisms. Field characteristics of the dune rhizoliths in the Badain Jaran Desert, NW China were analyzed to investigate formation mechanisms and interpret paleoenvironmental significance. Systematic field sampling and intensive examination showed that the tube-like rhizoliths without morphological structures of plant roots have been placed at the dune soil surface following erosion and weathering but the underground rhizoliths are still connected to the dead Artemisia roots.Rhizoliths occurred only along the windward, long gentle slopes of mega-dunes. Their distribution patterns of both types in connection with plant distribution and landscapes have been studied. Their petrological and mineralogical characters were performed in detail using microscopic and spectroscopic techniques (cathodoluminescence, scanning electronic microscopy and energy dispersive X-ray spectroscopy) in laboratory. Altogether, field and laboratory analyses showed that rhizolith cement is calcium carbonate and despite the high porosity of soil and high aridness of climate, *Revision, Unmarked Click here to download Revision, Unmarked: Rhizoliths outcrops of Badain Jaran Desert 2020 09 21 Revision Unmarked.doc 2 soil moisture plays an important role in sustaining Artemisia growth and rhizolith formation. Desert rhizoliths can therefore be used as a proxy to infer local soil moisture and plant communities. Moreover, as soil moisture content is related to climate and landscape position, rhizoliths could indirectly be indicators of aboveground environmental conditions, e.g. annual precipitation or humidity.

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“…Last, dissolved inorganic carbon in groundwater is not a likely source of carbon in Tengeri Desert where groundwater was not detected. Mass balance calculation suggests that degradation of plant roots and soil carbonates are the two main carbon sources of rhizolith cement (Sun et al, 2019b;Jin et al, 2015).…”

Section: Carbon Sourcesmentioning

confidence: 99%

“…Although mass balance calculation suggests that the lithogenic carbonates and pedogenic carbonates are the main carbon sources (Sun et al, 2019b;Jin et al, 2015) for rhizolith formation, soil CO 2 remains an important and direct source of carbon.…”

Section: Carbon Sourcesmentioning

confidence: 99%

Characterization and formation of the pristine rhizoliths around Artemisia roots in dune soils of Tengeri Desert, NW China

Sun

Zamanian

Huguet

et al. 2020

CATENA

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Rhizoliths are the products of mineralization, petrification, or fossilization around and/or within plant roots. Among them, carbonate rhizoliths are the most common.Pristine carbonate rhizoliths with co-existing plant root relicts in the Tengeri Desert, NW China were studied, with a combination of intensive field observations and laboratory methods such as microscopy, scanning electronic microscopy, energy dispersive X-ray spectra, radiocarbon dating, and isotope mass spectrometer. The field observations revealed that the pristine rhizoliths are only present at the sites where Artemisia sphaerocephala Krasch are growing i.e. in swales among sand dunes. Soil moisture of the swales is the main controlling factor of rhizoliths *Revision, Unmarked Click here to download Revision, Unmarked: Catena10368 Pristine Rhizoliths Revision unmarked 2020 03 25.1 V2.doc 3 / 51

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Geochemistry of sediment moisture in the Badain Jaran desert: Implications of recent environmental changes and water-rock interaction

Cited by 13 publications

References 35 publications

Study of groundwater recharge using combined unsaturated‐and saturated‐zone chloride mass balance methods

Study of groundwater recharge using combined unsaturated‐and saturated‐zone chloride mass balance methods

Outcrop distribution and formation of carbonate rhizoliths in Badain Jaran Desert, NW China

Characterization and formation of the pristine rhizoliths around Artemisia roots in dune soils of Tengeri Desert, NW China

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