Instituto de Geomorfología y Suelos, Departamento de Geografía, Universidad de Málaga, 29071 Málaga, Spain.
Sci Total Environ. 2018 Sep 15;636:1480-1489. doi: 10.1016/j.scitotenv.2018.05.004. Epub 2018 May 5.
Prescribed fire is a common management practice in Mediterranean region to reduce the amount of fuel and to decrease the wildfire risk. The objective of this study is to assess the effect of a prescribed fire on some soil properties, hydrological response and vegetation recovery in experimental plots 5 years after. The results showed that: i) with the exception of electrical conductivity, the prescribed fire did not affect the analyzed soil properties, and ii) overland flow and sediment transport were increased during the first two years, returning to levels pre-fire, 5 years post-fire. The rainfall threshold for overland flow generation was lower during the following months after the prescribed fire owing to the depletion of the vegetation cover. Immediately after the fire, the vegetation cover was of 1.9%, being the three main soil surface components that dominated the hydrological response: charcoal and decayed wood; blackish and greyish ash, and bare soil. However, these areas decreased very rapidly during the second year following the fire, principally, owing to the regrowth of herbaceous plants and shrubs. In addition, the vegetation cover in burned plots was 16.1% higher than that measured in the unburned ones. Overall, the prescribed fire only had an impact on runoff and sediment transport in the two years post-fire, as consequence of vegetation removal.
计划火烧是地中海地区减少燃料和降低野火风险的常用管理措施。本研究的目的是评估 5 年后实验小区计划火烧对一些土壤特性、水文响应和植被恢复的影响。结果表明：i）除电导率外，计划火烧并未影响分析的土壤特性，ii）径流量和输沙量在前两年增加，在火烧后 5 年恢复到火前水平。由于植被覆盖减少，在火烧后的几个月内，产生地表径流的降雨阈值较低。火烧后，植被覆盖度为 1.9%，是主导水文响应的三个主要土壤表面组分：木炭和腐烂木材；黑灰色和灰色灰烬以及裸土。然而，这些区域在火烧后的第二年迅速减少，主要是由于草本植物和灌木的再生。此外，火烧小区的植被覆盖度比未火烧小区高 16.1%。总体而言，由于植被清除，计划火烧仅对火烧后两年的径流量和输沙量产生影响。
