排序方式: 共有4条查询结果,搜索用时 5 毫秒
1
1.
Bouzouidja Ryad Béchet Béatrice Hanzlikova Jitka Sněhota Michal Le Guern Cécile Capiaux Hervé Jean-Soro Liliane Claverie Rémy Joimel Sophie Schwartz Christophe Guénon René Szkordilisz Flora Körmöndi Barnabas Musy Marjorie Cannavo Patrice Lebeau Thierry 《Journal of Soils and Sediments》2021,21(5):1909-1927
Journal of Soils and Sediments - In urban areas, soil functions are deeply impacted by all human activities, e.g., water infiltration, carbon storage, and chemical substances degradation potential.... 相似文献
2.
This paper presents the development of a practical tool to evaluate the required width of a hydrological buffer zone, in order to maintain the effects of subsurface drainage within reasonable limits. A simple mathematical formulation describing the lateral drawdown extent of a drained water table in unsteady flow conditions was used. Simulation results were worked out by introducing the concepts of protection level or threshold of tolerance for the vegetation of the protected area The latter are expressed in terms of an admissible drawdown combined with exceedance duration and/or frequency criteria. An application of this method to the protection of a peat bog system in the Swiss Jura region is presented. 相似文献
3.
We report on the in situ synthesis and stabilization of manganese dioxide (MnO2) onto four different silk yarns (mulberry, tasar, muga and eri silks). A new ultrasound-assisted procedure was used to reduce permanganate (MnO4 ?) and yielded MnO2 nanoparticles (NPs) on/in the different silk fibers. Using a factorial design we assessed the influence of the silk type, manganese precursor concentration, sonication time, and temperature. The results indicated no measurable effect of the process parameters on the silk structures, but significant correlation with the rate of degradation of methylene blue (MB) and the fraction of permanganate consumed. Further optimization of the factorial model identified the optimal process conditions for each silks: mulberry (150 min sonication, 20 mM permanganate), eri (360 min, 10 mM), tasar (150 min, 10 mM) and Muga (20 min, 10 mM). The operational stability (successive catalysis) of the optimum hybrids showed good performance over 5 cycles and most importantly reduced direct dye absorption relatively to dye oxidation. Overall, we found that all silks could template the formation and stabilization of different MnO2 polymorphs and yielded catalytic instead of stoichiometric hybrid fibers. 相似文献
4.
This paper presents new formulae to calculate the width of a buffer zone between a drained agricultural plot and a nature reserve area. These formulae are based on the classical Dupuit-Forchheimer assumptions and take into account the position of the impervious layer. With basic meteorological and agrological inputs, the proposed equations can be used to determine the length of the depression zone during watertable drawdown due to underground drainage. Calculating the required width of protection belts around peatland reserves is a typical and common application of the formulas presented in this paper. 相似文献
1