| 王占亮,卫晓锋,魏浩,李霞.河北坝上小滦河流域不同沉积单元粒度特征及其荒漠化的影响[J].矿产勘查,2021,12(4):1000-1007 |
| 河北坝上小滦河流域不同沉积单元粒度特征及其荒漠化的影响 |
| The grain size characteristics of different sedimentary units and the effects of desertification in the Xiaoluan River Basin in Bashang, Hebei |
| 投稿时间：2021-01-20 |
| DOI： |
| 中文关键词: 沉积结构 粒度特征 土地荒漠化 地质成因 小滦河流域 |
| 英文关键词: sedimentary structure grain size characteristics land deserti.cation geological origin Xiaoluan River Basin |
| 基金项目: |
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| 中文摘要: |
| 河北坝上承德市小滦河流域位于浑善达克沙地东南缘，是我国主要的土地荒漠化区之一。本文通过对不同沉积单元的物质结构、粒度特征分析，探讨土地荒漠化的地质作用。研究发现，在河流侵蚀和沉积作用、风搬运和沉积作用地质营力作用下，形成砾、砂、粉砂、粘土河流相沉积物，砂质风成相沉积物及混合结构沉积物；划分出河流谷地就地起沙型、沙地内部就地起沙型、风沙侵入型 3种荒漠化类型。建议在河道相砂砾石草 -湿地单元可适当发展马铃薯和中药材等产业，风积相垄状裸露沙地单元需采取灌、草为主的生态修复和封育管控，河湖 -风力混合草地单元要采取合理的放牧政策，避免沙漠化和草场的退化。 |
| 英文摘要: |
| The Xiaoluan River Basin on the Chengde Bashang is located on the southeastern edge of the Hunshandake Sandy Land and is one of the main land deserti.cation areas in my country. This article discusses the geological e.ects of land deserti.cation by analyzing the material structure and grain characteristics of di.erent sedimentary units. Under the action of river erosion and sedimentation, wind transport and sedimentation .uvial sediment consisting of gravel, sand, silt, clay, sandy eolian sediments and mixed structure sediments are formed. Three types of deserti.cation are divided into three types: in-situ sand in river valleys, in-sand sand in-situ, and wind-sand intrusion. It is suggested that industries such as potato and Chinese medicinal crop should be appropriately developed in the river facies sandy gravel grass-wetland unit. The aeolian facies ridge-shaped bare sandy land unit needs to adopt shrub and grass-based ecological restoration and enclosure control, and river-lake-wind mixed grassland Units should adopt reasonable grazing policies to avoid deserti.cation and pasture degradation. |
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