文章摘要
池政, 徐先英, 刘开琳, 刘虎俊, 孟瑞玲, 李亚琦, 富丽, 李雪宁.2种沙障内积砂粒径特征及其空间格局观测研究[J].水土保持学报,2021,35(2):113~121
2种沙障内积砂粒径特征及其空间格局观测研究
Study on Soil Particle Size Characteristics and Spatial Pattern of Sand Deposition in Two Types of Sand Barriers
投稿时间:2020-10-30  
DOI:10.13870/j.cnki.stbcxb.2021.02.016
中文关键词: 植物纤维网  土工编织袋沙障  粒度参数  粒配曲线  风沙侵蚀
英文关键词: plant fiber mesh  geotextile bag sand barrier  soil particle size parameters  soil particle distribution curve  aeolian sand erosion
基金项目:国家重点研发计划项目(2018YFC0507102-05);甘肃省科技重大专项(18ZD2FA009);甘肃省林业和草原科技创新项目(KY-19-33);甘肃省林业自列项目(KY-14-28)
作者单位E-mail
池政1, 徐先英1,2,3,4, 刘开琳2, 刘虎俊2, 孟瑞玲4, 李亚琦4, 富丽4, 李雪宁1 1. 中国林业科学研究院荒漠化研究所, 北京 100091

2. 甘肃省治沙研究所荒漠化与风沙灾害防治国家重点实验室培育基地
, 兰州 730070

3. 甘肃民勤荒漠草地生态系统国家野外科学观测研究站
, 甘肃 武威 733000

4. 甘肃农业大学林学院
, 兰州 730070 
xyingxu@163.com 
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中文摘要:
      土壤粒径分布是研究其沙化的重要物理指标之一,通过研究沙障方格内不同方位砂粒粒径特征对其微地貌蚀积状况进行分析,确定粒度特征对地貌形态的指示作用,为选取适宜沙障类型提供技术保障。在腾格里沙漠西缘流动沙丘布设的植物纤维网和土工编织袋沙障内不同区域取样并利用马尔文激光粒度仪测定砂粒径,对比分析障内与障间不同区域沙物质粒配组成、粒配曲线等参数特征。结果表明:土工编织袋沙障内截留砂粒作用强于纤维网沙障,即前者阻沙效果更优于后者。2种沙障内部方格砂粒含量在西方位比其余方位多18%~23%,表明在西方位为弱风蚀或强堆积。土工编织袋沙障方格中东和南方位砂粒含量比其余方位少8%~26%,即东方和南方位为风蚀区。土工编织袋沙障中部砂粒含量沿主风向逐渐提高,表示沙障内砂粒沉积增多;而纤维网沙障方格中变化不明显。在纤维网沙障区砂粒组分沿主风向逐渐减少,粒度组分与自然沙丘状态差异不显著(P<0.05),指示其沙障阻沙作用较弱。土工编织袋沙障砂粒组分集中在中南部,且跃移质组分分选性中部相比南北部较差,表明其砂粒组分在沙障内主风向下风区沉积较多。处于中线两侧纤维网沙障西侧比土工编织袋沙障东侧细砂和中砂含量高24%以上,而粗砂和极粗砂含量低近43%。
英文摘要:
      The distribution of soil particle size is one of the most important physical indicators for studying its desertification. By studying the soil particle size characteristics of sand in different azimuths in the sand barrier grid, the micro-topography erosion status was analyzed to determine the indication effect of the particle size characteristics on the landform shape, and to provide technical support for selecting suitable sand barrier types. Samples were taken from different areas within the sand barrier of plant fiber mesh and geotextile bag distributed in the flowing dunes on the western edge of Tengger Desert to measure the sand particle size with the mastersizer range of laser diffraction particle size analyzers. The parameters, such as the composition and curve of soil particle distribution in different areas between and within the barrier, were compared and analyzed. The results showed that the sand interception in geotextile bag sand barrier is more vital than that in fiber mesh sand barrier, and the former is better than the latter in sand-blocking. The content of checkerboard sand in the western position was 18%~23% higher than that in the other places, indicating weak wind erosion or substantial accumulation in the west region. The sand content in the middle and south directions of the square in geotextile bag sand barrier was 8%~26% less than that in the other orientations, and the east and south directions were wind erosion areas. The sand content in the middle of the geotextile bag sand barrier gradually increased along the main wind direction, indicating that the sand barrier's sand deposition increases, while the change in the fiber mesh sand barrier square was not apparent. In the fiber mesh sand barrier area, the sand particle composition decreased gradually along the main wind direction(P<0.05), indicating that the sand barrier has a weak sand-blocking effect. The sand components of geotextile bag sand barrier were concentrated in the central and southern part of the sand barrier, and the sorting of the center was worse than that of the north and south part of the sand barrier, which indicates that the sand components deposit more in the downwind area of the leading wind direction. The content of fine sand and medium sand on the west side of the fiber mesh sand barrier on both sides of the middle was more than 24% higher than that on the east side of the geotextile bag sand barrier, while the content of coarse sand and very coarse sand were nearly 43% lower.
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