Hydrological and geochemical responses of fire in a shallow cave system

Research output: Contribution to journalArticle

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Hydrological and geochemical responses of fire in a shallow cave system. / Bian, Fang; Coleborn, Katie; Flemons, Ingrid; Baker, Andy; Treble, Pauline C.; Hughes, Catherine E.; Baker, Andrew; Andersen, Martin S.; Tozer, Mark G.; Duan, Wuhui; Fogwill, Christopher J.; Fairchild, Ian J.

In: Science of the Total Environment, Vol. 662, 01.04.2019, p. 180-191.

Research output: Contribution to journalArticle

Harvard

Bian, F, Coleborn, K, Flemons, I, Baker, A, Treble, PC, Hughes, CE, Baker, A, Andersen, MS, Tozer, MG, Duan, W, Fogwill, CJ & Fairchild, IJ 2019, 'Hydrological and geochemical responses of fire in a shallow cave system', Science of the Total Environment, vol. 662, pp. 180-191. https://doi.org/10.1016/j.scitotenv.2019.01.102

APA

Bian, F., Coleborn, K., Flemons, I., Baker, A., Treble, P. C., Hughes, C. E., Baker, A., Andersen, M. S., Tozer, M. G., Duan, W., Fogwill, C. J., & Fairchild, I. J. (2019). Hydrological and geochemical responses of fire in a shallow cave system. Science of the Total Environment, 662, 180-191. https://doi.org/10.1016/j.scitotenv.2019.01.102

Vancouver

Author

Bian, Fang ; Coleborn, Katie ; Flemons, Ingrid ; Baker, Andy ; Treble, Pauline C. ; Hughes, Catherine E. ; Baker, Andrew ; Andersen, Martin S. ; Tozer, Mark G. ; Duan, Wuhui ; Fogwill, Christopher J. ; Fairchild, Ian J. / Hydrological and geochemical responses of fire in a shallow cave system. In: Science of the Total Environment. 2019 ; Vol. 662. pp. 180-191.

Bibtex

@article{de8036541b944a96a5f7438319cdcea0,
title = "Hydrological and geochemical responses of fire in a shallow cave system",
abstract = "The influence of wildfire on surface soil and hydrology has been widely investigated, while its impact on the karst vadose zone is still poorly understood. A moderate to severe experimental fire was conducted on a plot (10 m × 10 m) above the shallow Wildman's Cave at Wombeyan Caves, New South Wales, Australia in May 2016. Continuous sampling of water stable isotopes, inorganic geochemistry and drip rates were conducted from Dec 2014 to May 2017. After the fire, drip discharge patterns were significantly altered, which is interpreted as the result of increased preferential flows and decreased diffuse flows in the soil. Post-fire drip water δ18O decreased by 6.3‰ in the first month relative to the average pre-fire isotopic composition. Post-fire monitoring showed an increase in drip water δ18O in the following six months. Bedrock related solutes (calcium, magnesium, strontium) decreased rapidly after the fire due to reduced limestone dissolution time and potentially reduced soil CO2. Soil- and ash-derived solutes (boron, lead, potassium, sodium, silicon, iodine and iron) all decreased after the fire due to volatilisation at high temperatures, except for SO42−. This is the first study to understand the hydrological impact from severe fires conducted on a karst system. It provides new insights on the cave recharge process, with a potential explanation for the decreased d18O in speleothem-based fire study, and also utilise the decreased bedrock solutes to assess the wildfire impacts both in short and long time scales.",
keywords = "Karst, fire, hydrograph analysis, groundwater",
author = "Fang Bian and Katie Coleborn and Ingrid Flemons and Andy Baker and Treble, {Pauline C.} and Hughes, {Catherine E.} and Andrew Baker and Andersen, {Martin S.} and Tozer, {Mark G.} and Wuhui Duan and Fogwill, {Christopher J.} and Fairchild, {Ian J.}",
year = "2019",
month = apr,
day = "1",
doi = "10.1016/j.scitotenv.2019.01.102",
language = "English",
volume = "662",
pages = "180--191",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Hydrological and geochemical responses of fire in a shallow cave system

AU - Bian, Fang

AU - Coleborn, Katie

AU - Flemons, Ingrid

AU - Baker, Andy

AU - Treble, Pauline C.

AU - Hughes, Catherine E.

AU - Baker, Andrew

AU - Andersen, Martin S.

AU - Tozer, Mark G.

AU - Duan, Wuhui

AU - Fogwill, Christopher J.

AU - Fairchild, Ian J.

PY - 2019/4/1

Y1 - 2019/4/1

N2 - The influence of wildfire on surface soil and hydrology has been widely investigated, while its impact on the karst vadose zone is still poorly understood. A moderate to severe experimental fire was conducted on a plot (10 m × 10 m) above the shallow Wildman's Cave at Wombeyan Caves, New South Wales, Australia in May 2016. Continuous sampling of water stable isotopes, inorganic geochemistry and drip rates were conducted from Dec 2014 to May 2017. After the fire, drip discharge patterns were significantly altered, which is interpreted as the result of increased preferential flows and decreased diffuse flows in the soil. Post-fire drip water δ18O decreased by 6.3‰ in the first month relative to the average pre-fire isotopic composition. Post-fire monitoring showed an increase in drip water δ18O in the following six months. Bedrock related solutes (calcium, magnesium, strontium) decreased rapidly after the fire due to reduced limestone dissolution time and potentially reduced soil CO2. Soil- and ash-derived solutes (boron, lead, potassium, sodium, silicon, iodine and iron) all decreased after the fire due to volatilisation at high temperatures, except for SO42−. This is the first study to understand the hydrological impact from severe fires conducted on a karst system. It provides new insights on the cave recharge process, with a potential explanation for the decreased d18O in speleothem-based fire study, and also utilise the decreased bedrock solutes to assess the wildfire impacts both in short and long time scales.

AB - The influence of wildfire on surface soil and hydrology has been widely investigated, while its impact on the karst vadose zone is still poorly understood. A moderate to severe experimental fire was conducted on a plot (10 m × 10 m) above the shallow Wildman's Cave at Wombeyan Caves, New South Wales, Australia in May 2016. Continuous sampling of water stable isotopes, inorganic geochemistry and drip rates were conducted from Dec 2014 to May 2017. After the fire, drip discharge patterns were significantly altered, which is interpreted as the result of increased preferential flows and decreased diffuse flows in the soil. Post-fire drip water δ18O decreased by 6.3‰ in the first month relative to the average pre-fire isotopic composition. Post-fire monitoring showed an increase in drip water δ18O in the following six months. Bedrock related solutes (calcium, magnesium, strontium) decreased rapidly after the fire due to reduced limestone dissolution time and potentially reduced soil CO2. Soil- and ash-derived solutes (boron, lead, potassium, sodium, silicon, iodine and iron) all decreased after the fire due to volatilisation at high temperatures, except for SO42−. This is the first study to understand the hydrological impact from severe fires conducted on a karst system. It provides new insights on the cave recharge process, with a potential explanation for the decreased d18O in speleothem-based fire study, and also utilise the decreased bedrock solutes to assess the wildfire impacts both in short and long time scales.

KW - Karst

KW - fire

KW - hydrograph analysis

KW - groundwater

U2 - 10.1016/j.scitotenv.2019.01.102

DO - 10.1016/j.scitotenv.2019.01.102

M3 - Article

VL - 662

SP - 180

EP - 191

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -