Effects of Fibrous Roots of Four Herbaceous Species on Water Flow Velocity and Rill Detachment Capacity

IF 2.1 3区 环境科学与生态学 Q2 ECOLOGY
Ecohydrology Pub Date : 2025-03-12 DOI:10.1002/eco.70016
Misagh Parhizkar, Manuel Esteban Lucas-Borja, Pasquale Giuseppe Fabio Filianoti, Demetrio Antonio Zema
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Abstract

Vegetal species are potentially effective at stabilising soil against water erosion due to the beneficial effects of their root system. In this regard, fibrous roots increase soil aggregation and improve its physical properties. However, the literature about the variability in particle detachment capacity in rills (the prevalent erosion form on steep and long hillslopes) with species with fibrous roots is not abundant. To fill this gap, this study has analysed the effects of fibrous roots of four herbaceous species (Hypericum androsaemum, Urtica dioica L., Epipactis latifolia All. and Danae racemosa (L.) Moench.) that are typical of Northern Iran on water flow velocity (V) and rill detachment capacity (Dc) by flume experiments. The results showed that plants with fibrous roots significantly reduced the mean V, but not Dc (except for Danae racemosa (L.) Moench.) between two positions located upstream and downstream of a rill. Only Dc of Epipactis latifolia All. was significantly different (−30% to −40%) compared with the other species. High correlations were found among the plant root characteristics. The associations between those vegetal parameters and Dc were significant but weaker. Linear regressions between Dc and shear stress allowed the estimation of rill erodibility and the critical value of the shear stress for all species, while equations set up to predict Dc from the stream power of the water flow showed a very high accuracy in all cases. Despite some limitations (linked to the small scale of the experiments), the study has demonstrated that the root system of herbaceous species may play an important role in rill erosion, but this erosion form may be driven by factors other than root system morphology.

四种草本植物纤维根对水流速度和细沟剥离能力的影响
由于植物根系的有益作用,植物物种在稳定土壤防止水分侵蚀方面具有潜在的有效性。在这方面,纤维根增加土壤团聚,改善其物理性质。然而,关于细沟(陡坡和长坡上常见的侵蚀形式)中含有纤维根物种的颗粒分离能力变异性的文献并不丰富。为了填补这一空白,本研究分析了四种草本植物(金丝桃、荨麻、金丝桃)纤维根的作用。和总状丹参(L.)(Moench.)对伊朗北部典型的水流速度(V)和细沟分离能力(Dc)进行了水槽试验。结果表明,有纤维根的植物显著降低了平均V值,但对Dc值无显著影响(除总状丹参外)。(法语)位于小溪上游和下游的两个位置之间。只有黄连属的Dc。与其他种属相比差异显著(- 30% ~ - 40%)。根系性状之间存在高度相关。这些植被参数与Dc之间的相关性显著但较弱。直流电和剪应力之间的线性回归可以估计所有物种的细沟可蚀性和剪应力临界值,而从水流的流功率预测直流电的方程在所有情况下都显示出非常高的准确性。尽管存在一些局限性(与实验规模小有关),该研究表明,草本物种的根系可能在细沟侵蚀中发挥重要作用,但这种侵蚀形式可能是由根系形态以外的因素驱动的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ecohydrology
Ecohydrology 环境科学-生态学
CiteScore
5.10
自引率
7.70%
发文量
116
审稿时长
24 months
期刊介绍: Ecohydrology is an international journal publishing original scientific and review papers that aim to improve understanding of processes at the interface between ecology and hydrology and associated applications related to environmental management. Ecohydrology seeks to increase interdisciplinary insights by placing particular emphasis on interactions and associated feedbacks in both space and time between ecological systems and the hydrological cycle. Research contributions are solicited from disciplines focusing on the physical, ecological, biological, biogeochemical, geomorphological, drainage basin, mathematical and methodological aspects of ecohydrology. Research in both terrestrial and aquatic systems is of interest provided it explicitly links ecological systems and the hydrologic cycle; research such as aquatic ecological, channel engineering, or ecological or hydrological modelling is less appropriate for the journal unless it specifically addresses the criteria above. Manuscripts describing individual case studies are of interest in cases where broader insights are discussed beyond site- and species-specific results.
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