中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 黄土堆积体植物篱减沙效益与泥沙颗粒分形特征研究 农业机械学报 2017 (8) 270-278
Position: Home > Articles > Runoff and Sediment Reduction Benefit of Hedgerows and Fractal Characteristics of Sediment Particles on Loess Plateau Slope of Engineering Accumulation Transactions of the Chinese Society for Agricultural Machinery 2017 (8) 270-278

黄土堆积体植物篱减沙效益与泥沙颗粒分形特征研究

作  者：
杨帅;李永红;高照良;牛耀彬;白皓;王凯
单  位：
中国科学院大学;西北农林科技大学水土保持研究所;中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室
关键词：
工程堆积体;植物篱;土壤颗粒;分形维数;径流冲刷;减流减沙效益
摘  要：
为探究植物篱措施对工程堆积体边坡的减流减沙效益及其对侵蚀泥沙颗粒分形维数的影响,以堆积体未防护边坡为对照,以不同放水流量对不同坡度堆积体植物篱防护边坡进行了放水冲刷试验。结果表明:与对照相比,植物篱边坡初始产流时间滞后100~500 s,其产流率、产沙率整体均较小,产流率在时间尺度上表现为间歇性波动上升;植物篱减流效率在4%~60%之间,减沙效率范围在15%~50%之间,减流减沙效率均随坡度和放水流量的增加呈幂函数形式减小;各处理侵蚀泥沙颗粒中粉粒均占主导地位,黏粒次之,砂粒含量最少。与对照小区相比,植物篱防护边坡侵蚀泥沙砂粒体积分数降低,黏粒和粉粒体积分数升高;黏粒富集率增加,砂粒富集率减小,泥沙颗粒分形维数增大。分形维数与黏粒和砂粒体积分数之间均呈极显著线性相关,侵蚀泥沙颗粒分形维数主要由黏粒体积分数决定。
译  名：
Runoff and Sediment Reduction Benefit of Hedgerows and Fractal Characteristics of Sediment Particles on Loess Plateau Slope of Engineering Accumulation
作  者：
YANG Shuai;LI Yonghong;GAO Zhaoliang;NIU Yaobin;BAI Hao;WANG Kai;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources;University of Chinese Academy of Sciences;Institute of Soil and Water Conservation,Northwest A&F University;
关键词：
engineering accumulation;;hedgerows;;soil particle;;fractal dimension;;runoff scouring;;runoff and sediment reduction benefit
摘  要：
As a kind of special landform unit,engineering accumulation is an important source of soil erosion. To explore effects of hedgerows on sediment particles fractal dimension on hillslope,and the runoff and sediment reduction effects of engineering measures, the field pouring water scouring experiments were designed for different inflow rates( 35 L/min,45 L/min and 55 L/min) and slopes( 24°,28° and 32°) in six normal runoff plots( 20 m × 5 m). The results showed that the lagged time of initial runoff of hedgerow plots was 100 ~ 500 s,and the runoff rate and sediment yield rate were less than those of the control plot. Runoff rate rose for intermittent fluctuations in time scale compared with the control plot. Hedgerow reduced the flow rate by 4% ~ 60%,and decreased the rate of sediment by 15% ~50%. Significant power function relationships of runoff and sediment reduction rate with slope and flow rate were observed,and the effect of sediment reduction was better than that of runoff reduction rate equation. Runoff sediment was dominant with silt particle,followed by clay. Compared with the control plot,the volume percentage of sand particle in sediment of the hedgerow plots was reduced. In contrast,the volume percentage of clay and silt was increased. Hedgerow plots clay enrichment rate was higher than those in the control plot,and the sand accumulation rate was less than the control plot. The fractal dimension of the hedgerow plots was bigger than that in control plots. The relationships between fractal dimension and the volume fraction of clay and sand were available for better fitting linear model,and fractal dimension of sediment erosion was mainly determined by the volume fraction of clay. The researchresults could provide some basic data for establishing the model of soil erosion of engineering measures under the condition of accumulation,and provide a theoretical reference for the optimal allocation to hedgerow slope.

相似文章

导出引用
计量
文章访问数: 8
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46