首页 | 本学科首页   官方微博 | 高级检索  
     检索      

紫色丘陵区小流域侵蚀沉积断面构型及土壤颗粒分形特征
引用本文:张保华,何毓蓉,徐佩,廖超林,朱波.紫色丘陵区小流域侵蚀沉积断面构型及土壤颗粒分形特征[J].水土保持学报,2004,18(6):136-139.
作者姓名:张保华  何毓蓉  徐佩  廖超林  朱波
作者单位:1. 中国科学院水利部成都山地灾害与环境研究所,成都,610041;聊城大学,环境与规划学院,山东,聊城,252059;中国科学院研究生院,北京,100039
2. 中国科学院水利部成都山地灾害与环境研究所,成都,610041
3. 中国科学院水利部成都山地灾害与环境研究所,成都,610041;中国科学院研究生院,北京,100039
基金项目:中科院知识创新项目(KZCX3-SW-330),中科院科学与社会实践专项资助项目(创新研究类)
摘    要:土壤侵蚀沉积是地球物质循环的重要环节,但人为因素使之加剧并引起许多生态环境问题。以四川紫色丘陵区小流域为例,根据地形部位及土壤性状划分出侵蚀沉积纵横断面,分析其侵蚀沉积特征,并采集土壤样品研究其颗粒组成和分形维数特征。结果表明:侵蚀沉积纵横断面不同地形部位侵蚀沉积特征明显不同,可分冲刷剥蚀、搬运扩散和沉积掩埋3种类型并连为侵蚀沉积链;侵蚀沉积纵横断面的划分对土壤侵蚀与沉积的认识更全面,整体性更强。研究区颗粒组成特别是粘粒含量明显地体现出侵蚀沉积的差异,分形维数综合体现出明显地随高度降低粗粒物质减少、细粒物质增加的趋势。

关 键 词:紫色丘陵区  小流域  侵蚀沉积  断面构型  土壤颗粒  分形特征
文章编号:1009-2242(2004)06-0136-04

Erosion-Sediment Sections and Soil Particles Fractal Dimensions of Small Watershed in Purple Hilly Area
ZHANG Bao-hua.Erosion-Sediment Sections and Soil Particles Fractal Dimensions of Small Watershed in Purple Hilly Area[J].Journal of Soil and Water Conservation,2004,18(6):136-139.
Authors:ZHANG Bao-hua~
Institution:ZHANG Bao-hua~
Abstract:Natural soil erosion and sediment are important parts of geologic cycle, but they have been accelerated by human activities and many eco-environmental problems arised. In a small watershed of purple hilly area, Sichuan province, the erosion-sediment sections were marked out basing on differences of topographic and soil features, and the characteristics of soils particle component as well as its fractal dimensions were also studied on the routine analyzing results. The results showed that: the erosion-sediment features of different spots on erosion-sediment trans/vertical section are different distinctively. Types of washing and denudation, moving, and sediment and burying, which components an erosion-sediment catena, can be distinguished. Sediment is main process on erosion-sediment vertical section. We can get more entire and whole understanding of erosion-sediment through dividing erosion-sediment section types. Particle components, especially clay contents, significantly embodied the differences of erosion-sediment. The trend of sand decreasing and clay increasing with altitude reduce is embodied synthetically through particle fractal dimension.
Keywords:purple hilly area  small watershed  erosion-ediment section  erosion-sediment catena  particle component  fractal dimension
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《水土保持学报》浏览原始摘要信息
点击此处可从《水土保持学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号