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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Does the efficiency of grazer introduction to restore and preserve the hydraulic performance of infiltration basins depend on the physical and biological characteristics of the infiltration media?
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Does the efficiency of grazer introduction to restore and preserve the hydraulic performance of infiltration basins depend on the physical and biological characteristics of the infiltration media?

机译：Grazer介绍恢复和保留渗透盆地水力性能的效率是否取决于渗透介质的物理和生物学特性？

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摘要

Groundwater constitutes the principal source of drinking water in Europe but the increase of urbanized impervious surfaces reduced the natural recharge of aquifers. To bypass this problem, infiltration systems have been largely developed for groundwater recharge. Nevertheless, the hydraulic performance of these systems is often altered by physical and biological clogging. The present study aimed to experimentally quantify the impact of a grazer (Viviparus viviparus) on hydraulic conductivity of three infiltration basins differentially clogged by benthic algal mat. The influence of the gastropod was also measured on the physical (proportion of silt and clay particles) and biological (algal biomass, bacteria abundance, total organic carbon, gross photosynthetic and hydrolytic activities) of the top layer of the infiltration media. We expected that grazers would have the highest influence on hydraulic performance of basin presenting the highest algal biomass. Our results showed that: (i) the grazers had a positive influence on hydraulic conductivity in the three basins; (ii) these positive effects were not significantly influenced by the initial conditions (algal biomass) in the three basins; and (iii) the impact of the grazers on hydraulic conductivity was not restricted to the removal of biofilm biomass by trophic action but may be also associated with bioturbation activities (pelletization and sediment reworking of the top sediment layer). While management practices developed to improve hydraulic performance of infiltration basins mainly focus on costly and non-environmentally friendly actions (e.g. mechanical sediment scraping), this study highlights the opportunity to consider alternative ecological solutions using the trophic and/or the bioturbation activities of animals.
机译：地下水构成了欧洲饮用水的主要来源，但城市化的不透水表面的增加降低了含水层的自然补给。为了绕过这个问题，已经在很大程度上为地下水充电开发了渗透系统。然而，这些系统的水力性能通常通过物理和生物堵塞而改变。本研究旨在通过底栖藻垫差异地堵塞三种渗透盆地的液压导电性的影响。还对渗透介质的顶层的物理（淤泥和粘土颗粒的比例）和生物（藻类生物量，细菌丰富，总有机碳，总光合活性，总体碳，总光合和水解和水解活性）测量的影响。我们预计Grazers将对盆地浇筑最高藻类生物量的水力性能影响最大。我们的研究结果表明：（i）格拉泽斯对三个盆地的液压导电具有积极影响; （ii）这些积极作用未受三个盆地初始条件（藻类生物量）的显着影响; （iii）Grazers对液压导电性的影响不限于通过营养作用去除生物膜生物质，但也可能与生物干扰活动（粒化和顶部沉积层的沉积物重新加工）有关。虽然为提高渗透盆地的水力性能而制定的管理实践主要关注昂贵和非环保的行动（例如机械沉积物刮），但该研究突出了使用动物的营养和/或生物相关活动来考虑替代生态解决方案的机会。

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