海涂盐碱地工程边坡土壤抗冲刷性能试验研究

发布时间：2018-05-03 16:26

本文选题：坡度 + 流量　；参考：《农业现代化研究》2016年05期

【摘要】：本文对6个不同坡度和6个不同流量条件下的海涂盐碱土坡面进行上方来水径流冲刷试验,对试验中得到的盐土坡面冲刷侵蚀产沙率和几个典型的径流水动力学参数与坡度、流量的相关关系以及产沙率与各参数之间的相关关系进行分析,研究其抗冲刷性能。结果表明,产沙率Rs分别与坡度呈良好的线性正相关关系,与流量呈良好的对数关系。雷诺数Re与流量呈线性正相关而与坡度无显著相关关系。坡面水流剪切力τ和水流功率ω与流量和坡度均呈线性正相关关系。剪切力τ、水流功率ω与产沙率对数相关,都可以很好的预测不同坡度和流量条件下的产沙率。对比相关系数,水流功率ω能更精确预测产沙率Rs。该研究结果可为海涂围垦区盐碱土地工程边坡的土壤侵蚀预报模型的建立研究提供科学依据。
[Abstract]:In this paper, water runoff scour tests on the slope surface of salinized soil under 6 different slopes and 6 different flow conditions were carried out. The correlation between the erosion rate of erosion erosion and the correlation of several typical hydrodynamic parameters with the slope, the flow rate, and the correlation between the sediment yield and the parameters were carried out in the experiment. The results show that the sand production rate, Rs, has a good linear correlation with the slope, and a good logarithmic relationship with the flow rate. The Reynolds number Re has a linear positive correlation with the flow rate and has no significant correlation with the slope. The shear force and water power omega of the slope flow are linearly and positively correlated with the flow and slope. The shear stress tau, the flow power omega and the sediment yield logarithmic correlation, can well predict the sediment yield under the different slope and flow conditions. Compared with the correlation coefficient, the flow power Omega can more accurately predict the sand production rate Rs.. The results can provide a scientific basis for the establishment of the soil erosion prediction model for the saline alkali land engineering slope in the reclamation area.

【作者单位】：河海大学南方地区高效灌排与农业水土环境教育部重点实验室;河海大学水资源高效利用与工程安全国家工程研究中心;江苏省江宁区水利局;
【基金】：国家自然科学基金项目(51679062,41471180) 江苏省国土资源科技项目(KJXM2016003)~~
【分类号】：S157.1

【相似文献】