全新世时期古水土流失与古人类活动相互影响分析

对全新世古水土流失与古人类活动相互影响的研究方法进行了讨论和实践。借鉴第四纪环境学的研究手段 ,利用古人类活动区域周围的河流、湖泊沉积物及坡脚堆积物 ,可以获得古水土流失的信息 :在一定条件下 ,沉积物中孢粉数量的减少或草本植被的相对增加、磁化率的增大、迁移能力较弱的元素及化合物在沉积物中的富集 ,或沉积物分选差、粒度增大等 ,都可能指示着古水土流失的发生。通过对辽西大凌河剖面的孢粉分析 ,指出红山文化遗址堆积较薄且分布稀疏 ,可能与古水土流失加剧有关

A Study on Interaction Between Human Activities and Past Soil and Water Loss in Holocene

The method of studying for interaction between the past man activities and soil and water loss appearing in Holocene is discussed and practiced. The information of the past soil and water loss could be gotten from the sediment of river, lake or the bottom of slope according to the measure methods that used in Quaternary. In some degree, that the number of pollen is decreasing or vanished, the susceptibility is increasing, the elements or compounds transferring difficulty accumulate, or granularity is increasing in the sediment, may suggest that the soil and water loss occurred in the past time. The archaeological site of Hongshan culture is abroad but sparse, and the deposit of culture layer is thin, that may be caused by the past soil and water loss during that time in terms of pollen analysis in the sediment of Daling river in the north of Liaoning province.