Fire, Humans and Denudation at Wangrah Creek, Southern Tablelands, N.S.W.
Fire, Humans and Denudation at Wangrah Creek, Southern Tablelands, N.S.W.
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新南威尔士州南部高地 Wangrah Creek 的火灾、人类和剥削
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
I. Prosser
中科院分区：
文献类型：
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作者：
I. Prosser
改变的火灾制度对集水区剥蚀的影响是根据过去1万年的冲积沉积物以及通过监测野火前后的径流和侵蚀来确定的。从公元前3000 - 4000年开始，由于土著居民强烈的燃烧，火灾频率有所增加，但这并没有改变剥蚀的机制或速率，也没有像其他人所说的那样引起广泛的冲积。监测结果表明，在轻度火灾前后，大多数斜坡上的径流不足以携带沉积物。只有在强烈的火灾之后，径流和可蚀性才会增加到足以显著加速侵蚀的程度。然后确定最有可能导致其他集水区火灾制度改变而加速侵蚀的条件。
The influence of altered fire regimes on the denudation of a catchment is determined from alluvial deposits of the last 10,000 yrs and by monitoring runoff and erosion before and after a wildfire. An increase in fire frequency beginning at 3,000–4,000 yrs BP, as a result of intensified Aboriginal burning, did not change the mechanisms or rates of denudation nor did it cause widespread alluviation as suggested by others. The results of monitoring show that before and after mild fires there is insufficient runoff on most slopes to entrain sediment. Only after intense fires are runoff and erodibility increased enough to significantly accelerate erosion. Conditions are then identified which are most likely to lead to accelerated erosion from altered fire regimes in other catchments.