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Effect of salvage logging and check-dams on simulated hydrological connectivity in a burned area

AuthorsMartínez-Murillo, Juan F.; López-Vicente, Manuel
Keywordshydrological connectivity
salvage logging
rill erosion
post-fire scenarios
Issue Date2018
PublisherJohn Wiley & Sons
CitationMartínez-Murillo JF, López-Vicente M. Effect of salvage logging and check-dams on simulated hydrological connectivity in a burned area. Land Degradation and Development 29 (3): 701-712 (2018)
AbstractThis study assessed the effect of a wildfire and different post-fire practices (salvage logging, skid trails and check-dams) and vegetation recovery (eight scenarios) on the hydrological connectivity (HC) in eleven sub-catchments (330 ha) affected by a wildfire (213 ha) in 2012 in Spain. According to the Landsat 8 OLI/TIRS images, moderate, high and extreme burn severity affected 42.1% of the area. HC was calculated with an updated version of the Borselli's index. Within the burned area (BA), HC increased in all sub-catchments (SubC) after the wildfire (PostF-1), the salvage logging and the new skid trails (PostF-2), and the development of new gullies (PostF-3). Check-dams reduced connectivity but did not prevent the general trend. Afterwards, the incipient (PostF-4 and -5) and future vegetation recovery made slightly decrease HC. In the three forestry SubC with check-dams and large BA (67% of the study area), connectivity markedly increased (11.4, 18.2 and 22.9%) during the three first post-fire scenarios. In the 3 SubC with urban areas and small BA (5%), HC decreased a little because the linear elements connected the hillslopes between them. In the 3 SubC with urban areas and large BA (12%), HC increased less than in the forestry SubC (3.0, 8.2 and 9.1%). In the 2 forestry SubC without check-dams and small BA (16%), the increment of connectivity was low (2.5, 4.6 and 6.3%). Monitoring of check-dam siltation and of the actual vegetation regrowth is necessary to minimize the off-site consequences of high HC.
Description26 Pags.- 4 Tabls.- 6 Figs. The editorial version is available at: http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1099-145X
Publisher version (URL)http://dx.doi.org/10.1002/ldr.2735
Appears in Collections:(EEAD) Artículos
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