Seasonal variability of runoff and soil loss on forest road backslopes under simulated rainfall
Seasonal variability of runoff and soil loss on forest road backslopes under simulated rainfall
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模拟降雨条件下林道后坡径流和水土流失的季节变化
DOI：
10.1016/j.catena.2008.03.006
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发表时间：
2008
期刊：
影响因子：
6.2
通讯作者：
N. Bellinfante
中科院分区：
文献类型：
--
作者：
L. Martínez;A. J. López;N. Bellinfante
森林道路后坡产生的径流和土壤流失是地中海地区的一个严重问题。本文使用简单的便携式降雨模拟器，强度为 90 mm h−1，研究了 Los Alcornocales 自然公园（西班牙南部）森林道路后坡的地表径流和沉积物产生。为了研究季节性差异，在夏季和冬季对裸露和植被的道路后坡进行了一百次降雨模拟。植被地块的径流系数和土壤流失率低于裸露地块。从夏季到冬季，径流系数增加了 1.7 倍（裸背坡）和 3.1 倍（植被背坡）。建议保持 20% 以上的植被覆盖率，以将土壤流失率保持在较低水平，特别是在冬季。
Runoff and soil loss from forest road backslopes is a serious problem in Mediterranean areas. Surface runoff and sediment production on backslopes of forest roads in Los Alcornocales Natural Park (southern Spain) has been studied in this paper using a simple portable rainfall simulator at an intensity of 90 mm h−1. One hundred rainfall simulations were performed on bare and vegetated road backslopes during summer and winter in order to study seasonal differences. Runoff coefficients and soil loss rates were lower on the vegetated plots than on the bare ones. Runoff coefficients increased 1.7 (bare backslopes) and 3.1 times (vegetated backslopes) from summer to winter. Preserving the vegetation cover over 20% is recommended for keeping soil loss rates under low levels, especially during winter.