Cited by 96Fire effects on ecosystemsHydrology and Watershed Management StudiesPlant Water Relations and Carbon Dynamics

Hydrologic effects of large southwestern USA wildfires significantly increase regional water supply: fact or fiction?

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Wine, M L, Cadol, D·2016·Environmental Research Letters

Abstract

In recent years climate change and historic fire suppression have increased the frequency of large wildfires in the southwestern USA, motivating study of the hydrological consequences of these wildfires at point and watershed scales, typically over short periods of time. These studies have revealed that reduced soil infiltration capacity and reduced transpiration due to tree canopy combustion increase streamflow at the watershed scale. However, the degree to which these local increases in runoff propagate to larger scales—relevant to urban and agricultural water supply—remains largely unknown, particularly in semi-arid mountainous watersheds co-dominated by winter snowmelt and the North American monsoon. To address this question, we selected three New Mexico watersheds—the Jemez (1223 km 2 ), Mogollon (191 km 2 ), and Gila (4807 km 2 )—that together have been affected by over 100 wildfires since 1982. We then applied climate-driven linear models to test for effects of fire on streamflow metrics after controlling for climatic variability. Here we show that, after controlling for climatic and snowpack variability, significantly more streamflow discharged from the Gila watershed for three to five years following wildfires, consistent with increased regional water yield due to enhanced infiltration-excess overland flow and groundwater recharge at the large watershed scale. In contrast, we observed no such increase in discharge from the Jemez watershed following wildfires. Fire regimes represent a key difference between the contrasting responses of the Jemez and Gila watersheds with the latter experiencing more frequent wildfires, many caused by lightning strikes. While hydrologic dynamics at the scale of large watersheds were previously thought to be climatically dominated, these results suggest that if one fifth or more of a large watershed has been burned in the previous three to five years, significant increases in water yield can be expected.

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Crossref · 10.1088/1748-9326/11/8/085006

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  • Increased river flow can be sustained over multiple years after fires in New Mexico and Colorado.

    “recent studies in New Mexico and Colorado also show that increased river flow can be sustained over multiple years3,9.”

    From Burned forests impact water supplies (2018) · cites this paper as [3]

  • It is unclear how the current fire pattern affects water availability at the regional or continental scale.

    “However, it is unclear how this fire pattern affects water availability at the regional or continental scale1–4.”

    From Burned forests impact water supplies (2018) · cites this paper as [3]

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Research works printed but not linked: 2

  1. Keane R E, Morgan P and White J D 1999 Temporal patterns of ecosystem processes on simulated landscapes in glacier national park, Montana, USA Landscape Ecology 14 311-29 · DOI
  2. Rollins M G, Morgan P and Swetnam T 2002 Landscape-scale controls over 20th century fire occurrence in two large rocky mountain (USA) wilderness areas Landscape Ecology 17 539-57 · DOI

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Authors
Wine, M. L., & Cadol, D.
Affiliations
New Mexico Institute of Mining and Technology (US)
Corresponding author
Wine, M L
Venue
Environmental Research Letters
Published
2016-08-01
Volume
11
Issue
8
Pages
085006
ISSN
1748-9326 (ISSN-L)
OpenAlex
W2516543944
Cited by
96
References
54
Citations by year
2026: 9 · 2025: 11 · 2024: 17 · 2023: 12 · 2022: 9 · 2021: 10 · 2020: 10 · 2019: 7 · 2018: 7 · 2017: 4
FWCI
4.45
Type
journal article
Language
en
Open access
Locations
  • Environmental Research Letters (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Office of Experimental Program to Stimulate Competitive Research (1329470)
  • New Mexico Geological Society
  • Geological Society of America
  • New Mexico Water Resources Research Institute
Topics
  • Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
  • Physical Sciences › Environmental Science › Water Science and Technology › Hydrology and Watershed Management Studies
  • Physical Sciences › Environmental Science › Global and Planetary Change › Plant Water Relations and Carbon Dynamics
Keywords
infiltration-excess overland flow, groundwater recharge, fire regimes, snowmelt, North American monsoon, New Mexico, fire suppression

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