Effect of extreme precipitation events on the hydrochemistry index and stable isotope compositions of drip water in a subtropical cave, Guangxi, SW China

Wu, Xia; Pan, Moucheng; Zhu, Xiaohua; Cao, Jianhua; Zhang, Meiliang

doi:10.1007/s13146-017-0338-5

Cited by 9 publications

(11 citation statements)

References 33 publications

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“…The pH value decreased because of the in ltration of large amounts of precipitation, which dissolved soil CO 2 and generated HCO 3 − . Moreover, this water can dissolve the carbonate bedrock and may have in uenced the Ca 2+ of drip water increase (Wu et al 2018). The drip water temperature decreased owing to precipitation derived from subsurface water percolating into the cave during extreme precipitation events (Guo et al, 2019).…”

Section: Local Drought and Extreme Precipitation Eventsmentioning

confidence: 99%

Hydrogeochemical Responses of Cave Drip Water to the Local Climate in Liangfeng Cave, Southwest China

Pan²,

Zhang³

et al. 2021

Preprint

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The hydrogeochemistry of cave drip water is an important environmental index in cave systems, and drip water monitoring may be an essential solution for paleoclimate reconstructions. We measured the hydrogeochemical properties of the seasonal and perennial drip water and CO2 concentrations from 2015 to 2019 in Liangfeng Cave, Guilin, Southwest China. This study identified the difference in the regional environmental records in perennial and seasonal drip water. By comparing the regional climate data recorded by the drip water, the results showed the perennial drip water recorded regional climate information throughout the year, while the seasonal drip water only recorded the high precipitation periods. The precipitation during the 2015 dry season was abnormally high, which not sure what index is higher than the values in other rainy seasons. This indicates that hydrogeochemistry only represents changes in precipitation and not the alternation of dry and rainy seasons during this period.

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Section: Local Drought and Extreme Precipitation Eventsmentioning

confidence: 99%

Hydrogeochemical Responses of Cave Drip Water to the Local Climate in Liangfeng Cave, Southwest China

Pan²,

Zhang³

et al. 2021

Preprint

Self Cite

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“…Based on this fact, the fast‐rate drips could be expected to show a lower mineralisation, as observed in several cases (see, for example, Liu & Brancelj, 2014; Poulain et al, 2018). However, the fact that mineralisation increases with drip rate increase is documented more frequently (e.g., Faimon et al, 2016; Fernández‐Cortés, Calaforra, Sánchez‐Martos, & Gisbert, 2007; Genty & Deflandre, 1998; Wu, Pan, Zhu, Cao, & Zhang, 2018). This increase in mineralisation is generally interpreted as the result of mixing of the seeping water with the old more mineralized water that was flushed out from micro‐fissures in the epikarst zone under enhanced hydraulic pressure at high water excess (Fernández‐Cortés et al, 2007; Genty & Deflandre, 1998).…”

Section: Introductionmentioning

confidence: 99%

Effect of water excess on soil carbon dioxide, seepage water chemistry, and calcite speleothem growth: An experimental and modelling approach

Lang

Faimon

2020

Hydrological Processes

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The effect of the water excess in soil on soil gaseous carbon dioxide concentrations (c CO2) was studied based on field experiments. The gradual water addition of 15 and 30 L m −2 to leptosols and anthrosols, simulating 15 and 30 mm precipitation, respectively, caused the overall c CO2 increase of 1.53 × 10 −1 mol m −3 (increase by 60%) and 1.61 × 10 −1 mol m −3 (increase by 112%) in the soil airs. The effect of the c CO2 increment on seepage water, cave dripwater chemistry, and calcite speleothem overgrowths was deduced from geochemical modelling. It showed that the c CO2 increments may lead to the increments in total dissolved carbon, aqueous calcium, and dissolved solids of 1.10 × 10 −3 mol L −1 (increase by 35%), 4.45 × 10 −4 mol L −1 (increase by 30%), and 1.55 × 10 −3 mol L −1 (increase by 34%), respectively. After the total degassing of CO 2 in the cave, the increment in the saturation index of dripwater, SI, could reach up to ΔSI = 0.31, which means an increase by hundreds of percent. The water excess of 5 L m −2 following a dry period would cause the increment in saturation index ΔSI = 0.17. The modelling further showed that the c CO2 increase associated with the 30 L m −2 water excess could induce the calcite overgrowth up to 1 μm thick per 1 m 2 surface area. The effect of water excess with additional water supplies gradually weakens, probably due to reduced CO 2 diffusivity and soil microorganism activity. It can be assumed that the most contrasting peaks in dripwater chemistry are associated with the individual precipitation events after short dry periods. The increased supersaturation of dripwater is expected to lead to faster growth of speleothem and changes in calcite textures. K E Y W O R D S calcite speleothem overgrowth, field experiment, geochemical modelling, seepage water chemistry, soil CO 2 concentration, soil water excess Abbreviations symbols and acronyms: [Ca] T , total concentration of dissolved calcium; c CO2 , concentration of gaseous carbon dioxide; CO 2 , carbon dioxide; DLI, daylight illuminance; H 2 O, water; K, equilibrium constant; L, litre; P, barometric pressure; P CO2 , carbon dioxide partial pressure; P CO2(cave) , carbon dioxide partial pressure in cave atmosphere; P CO2(soil) , carbon dioxide partial pressure in soil atmosphere;

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“…These materials are due to the erosion of rocks, the existence of evaporative and sedimentary structures and their dissolution, such as gypsum, salt, iron, etc. As a result, their quality will change according to the length of the path and the presence of dissolution materials along the path in different points [5,6].…”

Section: Introductionmentioning

confidence: 99%

The Investigation of Groundwater Hydrochemistry of Khezri Plain, South Khorasan Province, Iran

zarepourfard¹,

Aryafar²,

zia³

2017

Water conserv. manag.

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The investigation of groundwater quality is one of the most important subjects in the field of groundwater resource. The main purpose of this research is the study of groundwater samples witch have been collected from 12 and 9 pumping wells throughout 1385-1394 years. The samples have been analyzed for major cations (Na, K, Mg and Ca), major anions (Cl, SO4, HCO3 andCO3) and physical parameters such as TDS, TH, Ec and pH. In following, the hydrogeochemical graphs such as Piper diagrams used for water classification. The analysis of results showed the increasing of TDS, TH and EC upper the limit. According to Schoeller and Wilcox diagrams, the water is not suitable for drinking purposes, agricultural and industrial uses. Such results are more helpful to manage the groundwater resource.

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Effect of extreme precipitation events on the hydrochemistry index and stable isotope compositions of drip water in a subtropical cave, Guangxi, SW China

Cited by 9 publications

References 33 publications

Hydrogeochemical Responses of Cave Drip Water to the Local Climate in Liangfeng Cave, Southwest China

Hydrogeochemical Responses of Cave Drip Water to the Local Climate in Liangfeng Cave, Southwest China

Effect of water excess on soil carbon dioxide, seepage water chemistry, and calcite speleothem growth: An experimental and modelling approach

The Investigation of Groundwater Hydrochemistry of Khezri Plain, South Khorasan Province, Iran

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