泥石流源地土壤团聚体抗蚀特征研究——以蒋家沟为例  

A STUDY ON ANTIERODIBILITY OF SOIL AGGREGATES IN DEBRIS FLOW PROVENANCE: A CASE STUDY IN JIANGJIAGOU

作　　者：廖超林[1] 何毓蓉[1] 徐佩[1] 

机构地区：[1]中科院成都山地灾害与环境研究所

出　　处：《地球与环境》2005年第4期65-69,共5页Earth and Environment

基　　金：国家自然科学基金(40025103)

摘　　要：土壤团聚体的抗蚀性特征对土壤侵蚀的影响已经受到国内外学者的广泛关注,但还未见有泥石流源地土壤团聚体与抗蚀性研究的报道。本文通过对蒋家沟泥石流源地典型剖面土壤团聚体抗蚀性研究,发现由于受山地垂直性气候的影响,该区土壤团聚体抗蚀性与海拔呈协同性变化规律,随着海拔的增加,年降雨量增加,植被覆盖增加,土壤持水量、有机质等胶结物质相对增加,土壤结构相对较好,稳定性好,土壤抗蚀能力增强,水土流失相对变弱。The effects of antierodibility of soil aggregates on soil erosion have been reported by many researchers both at home and abroad, but little research work has been done on debris flow provenance. In this work, the authors have found that the antierodibility of soil aggregates is related to mountain climates in a vertical direction based on the study on the antierodibility of soil aggregates in typical profiles of debris flow provenance in Jiangjiagou and the antierodibility of soil aggregates varies with the variation of latitude in this region. As the annual rainfall, vegetation and cements of organic matter tend to increase with increasing latitude, soil structure and soil stability become better and the soil aggregates have relatively good antierodibility. As a result, water erosion and soil loss are slowed up.

关 键 词：泥石流 土壤团聚体 化学稳定 抗蚀性 

分 类 号：P642.33[天文地球—工程地质学]