The influence of wildfire on water quality and watershed processes: new insights and remaining challenges
Charles C. Rhoades A E , João P. Nunes B , Uldis Silins C and Stefan H. Doerr DA US Department of Agriculture Forest Service, Rocky Mountain Research Station, Fort Collins, CO 80526, USA.
B Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciencias Universidade de Lisboa, Lisbon 1749-016, Portugal.
C Agricultural Life and Environmental Sciences, Renewable Resources, University of Alberta, Edmonton, Alberta T6G 2P5, Canada.
D Department of Geography, College of Science, Swansea University, Singleton Campus, Swansea SA2 8PP, UK.
E Corresponding author. Email: charles.c.rhoades@usda.gov
International Journal of Wildland Fire 28(10) 721-725 https://doi.org/10.1071/WFv28n10_FO
Published: 21 October 2019
Abstract
This short paper provides the framework and introduction to this special issue of International Journal of Wildland Fire. Its eight papers were selected from those presented at two consecutive conferences held in 2018 in Europe and the USA that focussed on the impacts of wildfire on factors that regulate streamflow, water quality, sediment transport, and aquatic habitats. Despite decades of watershed research, our understanding of the effects of wildfires on the processes that regulate clean water supply remains limited. Here, we summarise the key challenges and research needs in this interdisciplinary field and evaluate the contributions the eight special issue papers make to improved understanding of wildfire impacts on watershed processes. We also outline research priorities aimed at improving our ability to predict and, where necessary, mitigate wildfire impacts on watersheds. Achieving these advances is all the more pressing given the increasing extent and severity of wildfires in many areas that are the source of clean water for major population centres.
Additional keywords: drinking water, pollutants, water contamination, water supply.
References
Andela N, Morton DC, Giglio L, Chen Y, van der Werf GR, Kasibhatla PS, DeFries RS, Collatz GJ, Hantson S, Kloster S, Bachelet D, Forrest M, Lasslop G, Li F, Mangeon S, Melton JR, Yue C, Randerson JT (2017) A human-driven decline in global burned area. Science 356, 1356–1362.| A human-driven decline in global burned area.Crossref | GoogleScholarGoogle Scholar |
BBC (2017) Portugal wildfires: why are they so deadly? BBC News 20 June 2017. Available at https://www.bbc.co.uk/news/world-europe-40341180 [Verified 21 September 2019]
Bladon KD, Emelko MB, Silins U, Stone M (2014) Wildfire and the future of water supply. Environmental Science & Technology 48, 8936–8943.
| Wildfire and the future of water supply.Crossref | GoogleScholarGoogle Scholar |
Burke M, Hogue T, Ferreira M, Mendez C, Navarro B, Lopez S, Jay J (2010) The effect of wildfire on soil mercury concentrations in southern California watersheds. Water, Air, and Soil Pollution 212, 369–385.
| The effect of wildfire on soil mercury concentrations in southern California watersheds.Crossref | GoogleScholarGoogle Scholar |
Burke MP, Hogue TS, Kinoshita AM, Barco J, Wessel C, Stein ED (2013) Pre- and post-fire pollutant loads in an urban fringe watershed in southern California. Environmental Monitoring and Assessment 185, 10131–10145.
| Pre- and post-fire pollutant loads in an urban fringe watershed in southern California.Crossref | GoogleScholarGoogle Scholar |
Chambers ME, Fornwalt PJ, Malone SL, Battaglia MA (2016) Patterns of conifer regeneration following high severity wildfire in ponderosa pine – dominated forests of the Colorado Front Range. Forest Ecology and Management 378, 57–67.
| Patterns of conifer regeneration following high severity wildfire in ponderosa pine – dominated forests of the Colorado Front Range.Crossref | GoogleScholarGoogle Scholar |
Covino T, McGlynn B, Baker MCG (2010) Separating physical and biological nutrient retention and quantifying uptake kinetics from ambient to saturation in successive mountain stream reaches. Journal of Geophysical Research Biogeosciences 115, G04010
Dennison PE, Brewer SC, Arnold JD, Moritz MA (2014) Large wildfire trends in the western United States, 1984–2011. Geophysical Research Letters 41, 2928–2933.
| Large wildfire trends in the western United States, 1984–2011.Crossref | GoogleScholarGoogle Scholar |
Emelko MB, Silins U, Bladon KD, Stone M (2011) Implications of land disturbance on drinking water treatability in a changing climate: demonstrating the need for source water supply and protection strategies. Water Research 45, 461–472.
| Implications of land disturbance on drinking water treatability in a changing climate: demonstrating the need for source water supply and protection strategies.Crossref | GoogleScholarGoogle Scholar |
Flannigan M, Cantin AS, de Groot WJ, Wotton M, Newbery A, Gowman LM (2013) Global wildland fire season severity in the 21st century. Forest Ecology and Management 294, 54–61.
Gannon BM, Wei Y, MacDonald LH, Kampf SK, Jones KW, Cannon JB, Wolk BH, Cheng AS, Addington RN, Thompson MP (2019) Prioritising fuels reduction for water supply protection. International Journal of Wildland Fire 28, 785–803.
| Prioritising fuels reduction for water supply protection.Crossref | GoogleScholarGoogle Scholar |
Hall RJO, Bernhardt ES, Likens GE (2002) Relating nutrient uptake with transient storage in forested mountain streams. Limnology and Oceanography 47, 255–265.
| Relating nutrient uptake with transient storage in forested mountain streams.Crossref | GoogleScholarGoogle Scholar |
Hallema DW, Robinne FN, Bladon KD (2018) Reframing the challenge of global wildfire threats to water supplies. Earth’s Future 6, 772–776.
| Reframing the challenge of global wildfire threats to water supplies.Crossref | GoogleScholarGoogle Scholar |
Harper AR, Santin C, Doerr SH, Froyd CA, Albini D, Otero XL, Viñas L, Pérez-Fernández B (2019) Chemical composition of wildfire ash produced in contrasting ecosystems and its toxicity to Daphnia magna. International Journal of Wildland Fire 28, 726–737.
| Chemical composition of wildfire ash produced in contrasting ecosystems and its toxicity to Daphnia magna.Crossref | GoogleScholarGoogle Scholar |
Harvey BJ, Donato DC, Turner MG (2014) Recent mountain pine beetle outbreaks, wildfire severity, and postfire tree regeneration in the US Northern Rockies. Proceedings of the National Academy of Sciences of the United States of America 111, 15120–15125.
| Recent mountain pine beetle outbreaks, wildfire severity, and postfire tree regeneration in the US Northern Rockies.Crossref | GoogleScholarGoogle Scholar |
Harvey BJ, Donato DC, Turner MG (2016a) Burn me twice, shame on who? Interactions between successive forest fires across a temperate mountain region. Ecology 97, 2272–2282.
| Burn me twice, shame on who? Interactions between successive forest fires across a temperate mountain region.Crossref | GoogleScholarGoogle Scholar |
Harvey BJ, Donato DC, Turner MG (2016b) High and dry: post-fire tree seedling establishment in subalpine forests decreases with post-fire drought and large stand-replacing burn patches. Global Ecology and Biogeography 25, 655–669.
| High and dry: post-fire tree seedling establishment in subalpine forests decreases with post-fire drought and large stand-replacing burn patches.Crossref | GoogleScholarGoogle Scholar |
Hohner AK, Rhoades CC, Wilkerson P, Rosario-Ortiz FL (2019) Wildfires alter forest watersheds and threaten drinking water quality. Accounts of Chemical Research 52, 1234–1244.
| Wildfires alter forest watersheds and threaten drinking water quality.Crossref | GoogleScholarGoogle Scholar |
Jergler D (2019) Insured losses from November 2018 California wildfires top $12B. Insurance Journal 8 May 2019. Available at https://www.insurancejournal.com/news/west/2019/05/08/525930.htm [Verified 21 September 2019]
Jolly WM, Cochrane MA, Freeborn PH, Holden ZA, Brown TJ, Williamson GJ, Bowman DMJS (2015) Climate-induced variations in global wildfire danger from 1979 to 2013. Nature Communications 6, 7537
| Climate-induced variations in global wildfire danger from 1979 to 2013.Crossref | GoogleScholarGoogle Scholar |
Knorr W, Arneth A, Jiang L (2016) Demographic controls of future global fire risk. Nature Climate Change 6, 781–785.
| Demographic controls of future global fire risk.Crossref | GoogleScholarGoogle Scholar |
Majidzadeh H, Coates A, Tsai KP, Olivares C, Trettin C, Uzun H, Karanfil T, Chow A (2019) Long-term watershed management is an effective strategy to reduce organic matter export and disinfection by-products (DBPs) precursors in source water. International Journal of Wildland Fire 28, 804–813.
| Long-term watershed management is an effective strategy to reduce organic matter export and disinfection by-products (DBPs) precursors in source water.Crossref | GoogleScholarGoogle Scholar |
Malone SL, Fornwalt PJ, Battaglia MA, Chambers ME, Iniguez JE, Sieg CH (2018) Mixed-severity fire fosters heterogeneous spatial patterns of conifer regeneration in a dry conifer forest. Forests 9, 45
| Mixed-severity fire fosters heterogeneous spatial patterns of conifer regeneration in a dry conifer forest.Crossref | GoogleScholarGoogle Scholar |
Martens A, Silins U, Proctor H, Williams C, Wagner M, Emelko M, Stone M (2019) Long term impact of severe wildfire and post-wildfire salvage logging on macroinvertebrate assemblage structure in Alberta’s Rocky Mountains. International Journal of Wildland Fire 28, 738–749.
| Long term impact of severe wildfire and post-wildfire salvage logging on macroinvertebrate assemblage structure in Alberta’s Rocky Mountains.Crossref | GoogleScholarGoogle Scholar |
Martin DA (2016) At the nexus of fire, water and society. Philosophical Transactions of the Royal Society of London Series B, Biological Sciences 371, 20150172
| At the nexus of fire, water and society.Crossref | GoogleScholarGoogle Scholar |
McWethy DB, Schoennagel T, Higuera PE, Krawchuk M, Harvey PJ, Metcalf EC, Schultz C, Miller C, Metcalf AL, Buma B, Virapongse A, Kulig JC, Stedman RC, Ratajczak Z, Nelson CR, Kolden C (2019) Rethinking resilience to wildfire. Nature Sustainability 2, 797–804.
| Rethinking resilience to wildfire.Crossref | GoogleScholarGoogle Scholar |
Moody JA, Shakesby RA, Robichaud PR, Cannon SH, Martin DA (2013) Current research issues related to post-wildfire runoff and erosion processes. Earth-Science Reviews 122, 10–37.
| Current research issues related to post-wildfire runoff and erosion processes.Crossref | GoogleScholarGoogle Scholar |
Nunes JP, Doerr SH, Sheridan G, Neris J, Santin C, Emelko MB, Silins U, Robichaud PR, Elliot WJ, Keizer J (2018) Assessing water contamination risk from vegetation fires: challenges, opportunities and a framework for progress. Hydrological Processes 32, 687–694.
| Assessing water contamination risk from vegetation fires: challenges, opportunities and a framework for progress.Crossref | GoogleScholarGoogle Scholar |
Olivares C, Zhang W, Uzun H, Erdem CU, Majidzadeh H, Trettin C, Karanfil T, Chow A (2019) Optical in-situ sensors capture dissolved organic carbon (DOC) dynamics after prescribed fire in high-DOC forest watersheds. International Journal of Wildland Fire 28, 761–768.
Pierson DN, Robichaud PR, Rhoades CC, Brown RE (2019) Soil carbon and nitrogen eroded after severe wildfire and erosion mitigation treatments. International Journal of Wildland Fire 28, 814–821.
Radeloff VC, Helmers DP, Kramer HA, Mockrin MH, Alexandre PM, Bar-Massada A, Butsic V, Hawbaker TJ, Martinuzzi S, Syphard AD, Stewart SI (2018) Rapid growth of the US wildland-urban interface raises wildfire risk. Proceedings of the National Academy of Sciences of the United States of America 115, 3314–3319.
| Rapid growth of the US wildland-urban interface raises wildfire risk.Crossref | GoogleScholarGoogle Scholar |
Rhoades CC, Entwistle D, Butler D (2011) The influence of wildfire extent and severity on streamwater chemistry, sediment and temperature following the Hayman Fire, Colorado. International Journal of Wildland Fire 20, 430–442.
| The influence of wildfire extent and severity on streamwater chemistry, sediment and temperature following the Hayman Fire, Colorado.Crossref | GoogleScholarGoogle Scholar |
Rhoades CC, Pelz KA, Fornwalt PJ, Wolk BH, Cheng AS (2018) Overlapping bark beetle outbreaks, salvage logging and wildfire restructure a lodgepole pine ecosystem. Forests 9, 101
| Overlapping bark beetle outbreaks, salvage logging and wildfire restructure a lodgepole pine ecosystem.Crossref | GoogleScholarGoogle Scholar |
Rhoades CC, Chow AT, Covino T, Fegel TS, Pierson D, Rhea A (2019) The legacy of severe wildfire on stream nitrogen and carbon in headwater catchments. Ecosystems 22, 643–657.
| The legacy of severe wildfire on stream nitrogen and carbon in headwater catchments.Crossref | GoogleScholarGoogle Scholar |
Riggan PJ, Lockwood RN, Jacks PM, Colver CG, Weirich F, DeBano LF, Brass JA (1994) Effects of fire severity on nitrate mobilization in watersheds subject to chronic atmospheric deposition. Environmental Science & Technology 28, 369–375.
| Effects of fire severity on nitrate mobilization in watersheds subject to chronic atmospheric deposition.Crossref | GoogleScholarGoogle Scholar |
Robichaud PR, Beyers JL, Neary DG (2000) Evaluating the effectiveness of post-fire rehabilitation treatments. USDA Forest Service, Rocky Mountain Research Station, General Technical Report RMRS-GTR-63. (Fort Collins, CO, USA)
Robinne FN, Bladon KD, Miller C, Parisien MA, Mathieu J, Flannigan MD (2018) A spatial evaluation of global wildfire-water risks to human and natural systems. The Science of the Total Environment 610–611, 1193–1206.
| A spatial evaluation of global wildfire-water risks to human and natural systems.Crossref | GoogleScholarGoogle Scholar |
Rust AJ, Hogue TS, Saxe S, McCray J (2018) Post-fire water-quality response in the western United States. International Journal of Wildland Fire 27, 203–216.
| Post-fire water-quality response in the western United States.Crossref | GoogleScholarGoogle Scholar |
Rust AJ, Saxe S, McCray J, Rhoades CC, Hogue TS (2019) Evaluating the factors responsible for post-fire water quality response in forests of the western USA. International Journal of Wildland Fire 28, 769–784.
| Evaluating the factors responsible for post-fire water quality response in forests of the western USA.Crossref | GoogleScholarGoogle Scholar |
Shakesby RA, Doerr SH (2006) Wildfire as a hydrological and geomorphological agent. Earth-Science Reviews 74, 269–307.
| Wildfire as a hydrological and geomorphological agent.Crossref | GoogleScholarGoogle Scholar |
Silins U, Bladon KD, Kelly EN, Esch E, Spence JR, Emelko MB, Boon S, Wagner MJ, Williams CHS, Tichkowsky I (2014) Five-year legacy of wildfire and salvage logging impacts on nutrient runoff and aquatic plant, invertebrate, and fish productivity. Ecohydrology 7, 1508–1523.
| Five-year legacy of wildfire and salvage logging impacts on nutrient runoff and aquatic plant, invertebrate, and fish productivity.Crossref | GoogleScholarGoogle Scholar |
Stein ED, Brown JS, Hogue TS, Burke MP, Kinoshita A (2012) Stormwater contaminant loading following southern California wildfires. Environmental Toxicology and Chemistry 31, 2625–2638.
| Stormwater contaminant loading following southern California wildfires.Crossref | GoogleScholarGoogle Scholar |
Stevens-Rumann CS, Kemp KB, Higuera PE, Harvey BJ, Rother MT, Donato DC, Morgan P, Veblen TT (2018) Evidence for declining forest resilience to wildfires under climate change. Ecology Letters 21, 243–252.
| Evidence for declining forest resilience to wildfires under climate change.Crossref | GoogleScholarGoogle Scholar |
Triska FJ, Kennedy VC, Avanzino RJ, Zellweger GW, Bencala KE (1989) Retention and transport of nutrients in a third-order stream in northwestern California: hyporheic processes. Ecology 70, 1893–1905.
| Retention and transport of nutrients in a third-order stream in northwestern California: hyporheic processes.Crossref | GoogleScholarGoogle Scholar |
Westerling AL (2016) Increasing western US forest wildfire activity: sensitivity to changes in the timing of spring. Philosophical Transactions of the Royal Society of London Series B, Biological Sciences 371, 20150178
| Increasing western US forest wildfire activity: sensitivity to changes in the timing of spring.Crossref | GoogleScholarGoogle Scholar |
Williams C, Silins U, Spencer S, Wagner M, Stone M, Emelko M (2019) Net precipitation in burned and unburned subalpine forest stands after wildfire in the northern Rocky Mountains. International Journal of Wildland Fire 28, 750–760.
| Net precipitation in burned and unburned subalpine forest stands after wildfire in the northern Rocky Mountains.Crossref | GoogleScholarGoogle Scholar |