State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.
School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, 450046, China.
Environ Sci Pollut Res Int. 2022 Oct;29(46):69599-69617. doi: 10.1007/s11356-022-20409-5. Epub 2022 May 16.
Research on the mechanism of plant root-soil consolidation is a current focus in research into the ecological restoration of banks. The stability of ecological banks is central to this research, and bank stability is closely related to plant combinations and spacing. Recent research on reinforced anchorage of plant roots has mainly focused on root length and angle, and on other parts of the root system, and only a few studies have examined the combination of different types of roots. In this study, a coupled slope stability assessment system is created, composed of root morphological parameters and involving calculations using the finite element model ABACUS. This paper selects the two banks of the lower reaches of the Tiantang River in the flood zone of Yongding River as the research area, and examines slope surface plants. And then the reinforcement effect of different shrub roots combinations and plant spacing are evaluated for determining the optimal shrub layout, with the aim of solving the instability problem of collapsible silty clay bank slopes and associated risks. The results indicated that when the shrub plant spacing is 0.65 m, the optimal shrub combination is Tamarix chinensis + Philadelphus incanus, and when the shrub plant spacing is 0.75 m, the optimal shrub combination is Tamarix chinensis + Euonymus alatus. The study found that the root system morphology and the fibrous roots amount at the foot of the slope can have different degrees of influence on the shallow soil stability of the silty clay slope under different shrubs plant spacing conditions.
植物根系固土机理研究是当前河岸生态恢复研究的重点。生态岸坡的稳定性是该研究的核心，而岸坡的稳定性与植物组合和间距密切相关。最近对植物根系加固锚固的研究主要集中在根长和角度上，以及根系的其他部分，只有少数研究考察了不同类型根系的组合。本研究创建了一个耦合的边坡稳定性评估系统，由根系形态参数组成，并涉及使用有限元模型 ABACUS 的计算。本文选择永定河洪水区天堂河下游两岸作为研究区域，对坡面植物进行研究。然后评估不同灌木根系组合和植物间距的加固效果，以确定最优的灌木布局，旨在解决易坍塌粉质黏土岸坡的不稳定性问题及其相关风险。结果表明，当灌木植物间距为 0.65 m 时，最优灌木组合为柽柳+珍珠梅，当灌木植物间距为 0.75 m 时，最优灌木组合为柽柳+卫矛。研究发现，在不同灌木植物间距条件下，根系形态和坡脚须根数量对粉质黏土边坡浅层土壤稳定性有不同程度的影响。
