Effects of differing wildfire severities on soil wettability and implications for hydrological response

Doerr, Stefan H.; Shakesby, Richard A.; Blake, William H.; Chafer, Chris J.; Humphreys, Geoff S.; Wallbrink, Peter

doi:10.1016/j.jhydrol.2005.06.038

Cited by 271 publications

(180 citation statements)

References 49 publications

Supporting

Mentioning

158

Contrasting

Unclassified

Order By: Relevance

“…The hydrophobic nature of soils prevents water from permeating into the subsurface, resulting in substantial increases in hill slope runoff [5], soil erosion, and overflow unpredictability [6,7]. Petroleum operations on lands frequently cause non-wetting of soils on account of oil pollution by drilling, leakage from wellheads and pipelines, and overflow at gathering stations [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Evaporation and Drainage in Wettable and Water-Repellent Sands

et al. 2015

View full text Add to dashboard Cite

This study presents experimental results on evaporation and drainage in both wettable and water-repellent sands whose surface wettability was artificially modified by silanization. The 2D optical and 3D X-ray computed tomographic imaging was performed during evaporation and the water retention during cyclic drainage and infiltration was measured to assess effects of wettability and initial wetting conditions. The evaporation gradually induces its front at the early stage advance regardless of the wettability and sand types, while its rate becomes higher in water-repellent Ottawa sand than the wettable one. Jumunjin sand which has a smaller particle size and irregular particle shape than Ottawa sand exhibits a similar evaporation rate independent of wettability. Water-repellent sand can facilitate the evaporation when both wettable and water-repellent sands are naturally in contact with each other. The 3D X-ray imaging reveals that the hydraulically connected water films in wettable sands facilitate the propagation of the evaporation front into the soil such that the drying front deeply advances into the soil. For cyclic drainage-infiltration testing, the evolution of water retention is similar in both wettable and water-repellent sands when both are initially wet. However, when conditions are initially dry, water-repellent sands exhibit low residual saturation values. The experimental observations made from this study propose that the surface wettability may not be a sole factor while the degree of OPEN ACCESSSustainability 2015, 7 5649 water-repellency, type of sands, and initial wetting condition are predominant when assessing evaporation and drainage behaviors.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Evaporation and Drainage in Wettable and Water-Repellent Sands

et al. 2015

View full text Add to dashboard Cite

show abstract

“…A number of components of the hydrologic cycle can be impacted (Table 1), but K sat reductions are often implicated as a major factor affecting baseflow and stormflow responses of burned watersheds. One clear signature of K sat parameters is that they are highly variable (Doerr et al 1998, Doerr et al 2006. A number of recent studies reporting changes in K sat listed in Table 3 demonstrate clear reductions in conductivity after fires (Parks & Cundy 1989, Greene et al 1990, Robichaud 2000, Ekinci 2006, Fox et al 2007, Ekinci et al 2008, Blake et al 2009, Novák et al 2009, and Nyman et al 2011.…”

Section: Role Of Organic Horizons In Soil Hydraulic Conductivitymentioning

confidence: 99%

Impacts of Wildfire Severity on Hydraulic Conductivity in Forest, Woodland, and Grassland Soils

Neary¹

2011

Hydraulic Conductivity - Issues, Determination and Applications

View full text Add to dashboard Cite

“…En este sentido, la cantidad de biomasa consumida, que variará en función del grado de severidad del fuego, influye directamente en la estructura y la dinámica de la vegetación post-incendio, así como en la dinámica hidrogeomorfológica del suelo. En general, se admite que una alta severidad del fuego lleva asociada tasas de recuperación de la vegetación bajas y tasas de erosión más elevadas que las áreas de baja severidad (Doerr et al, 2006;Moody et al, 2013).…”

Section: Introductionunclassified

Burn severity and regeneration in large forest fires: an analysis from Landsat time series

et al. 2017

View full text Add to dashboard Cite

Resumen: El objetivo de este estudio es contribuir a una mejor comprensión de los patrones de regeneración postincendio a partir de la severidad del fuego, así como estudiar el tiempo previsible que determinados ecosistemas forestales emplearán en recuperar su estado inicial. El estudio analiza el grado de severidad del incendio de Uncastillo de 1994 (7664 ha), uno de los mayores ocurridos en España en ese año, así como su dinámica de regeneración natural en las dos décadas siguientes (hasta 2014) mediante el empleo de series temporales de imágenes Landsat (sensores TM y ETM+). La estimación de la severidad post-incendio se ha basado en el uso de los modelos de transferencia radiativa PROSPECT y GeoSAIL, siguiendo la metodología propuesta por De Santis y Chuvieco (2009). Por su parte, los procesos de regeneración se han caracterizado mediante el empleo de trayectorias espectrales mediante el uso del modelo LandTrendr (Landsat-based Detection of Trends in Disturbance and Recovery) (Kennedy et al., 2010). Los resultados de este estudio contribuyen a una mayor comprensión de la dinámica general post-incendio de las áreas forestales y en último término permiten desarrollar estrategias efectivas para una gestión forestal sostenible.Palabras clave: incendios forestales, GeoCBI, regeneración, severidad, LandTrendr, Landsat. Burn severity and regeneration in large forest fires: an analysis from Landsat time seriesAbstract: The main objective of this study is to take a close look at post-fire recovery patterns in forestry areas under different burn severity conditions. We also investigate the time that forestry ecosystems take to recover their pre-fire condition. In this context, this study analyses both the level of severity in Uncastillo forest wildfire (7.664ha), one of the greatest occurred in Spain in 1994, and the pattern of natural recovery in the following decades (until 2014) using annual Landsat time series (sensors TM&ETM+). Burn severity has been estimated by means of PROSPECT and GeoSAIL radiative transfer models following methodologies described in De Santis and Chuvieco (2009). On the other hand, recovery processes have been assessed from spectral profiles using the LandTrendr model (Landsat-based Detection of Trends in Disturbance and Recovery) (Kennedy et al., 2010). Results contribute to a further understanding of the post-fire evolution in forestry areas and to develop effective strategies for sustainable forest management.

show abstract

Effects of differing wildfire severities on soil wettability and implications for hydrological response

Cited by 271 publications

References 49 publications

Experimental Investigation of Evaporation and Drainage in Wettable and Water-Repellent Sands

Experimental Investigation of Evaporation and Drainage in Wettable and Water-Repellent Sands

Impacts of Wildfire Severity on Hydraulic Conductivity in Forest, Woodland, and Grassland Soils

Burn severity and regeneration in large forest fires: an analysis from Landsat time series

Contact Info

Product

Resources

About