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Optical fiber technology for monitoring and preventing biomass washout from bio...
Silva, Flávio C.; Martins, Martinho A. S.; Bilro, Lúcia; Nogueira, Rogério N.; Capela, Isabel; Jacob Keizer, J.A novel plastic optical fiber (POF) sensor was investigated to monitor total suspended solids (TSS) concentration continuously, offering insights into wastewater treatment bioreactors without disturbing them. First, off-line experiments with both anaerobic and aerobic sludge (in concentrations ranging between 0.1 and 8.6 g TSS L−1) were used to establish the exponential relationship of the sensor’s transmitted ...
Assessing the role of pre-fire ground preparation operations and soil water rep...
Malvar, Maruxa C.; Martins, Martinho A. S.; Nunes, João P.; Robichaud, Peter R.; Keizer, J. JacobThis study addressed the impacts of contrasting pre-fire ground preparation operations on post-fire runoff and inter-rill erosion in six eucalypt plantations in north-central Portugal, with a special emphasis on the role of soil water repellency in the seasonal patterns of overland flow generation. To this end, a down slope ploughed, a contour ploughed and a terraced site were compared with three unploughed sit...
Runoff and inter-rill erosion in a maritime pine and a eucalypt plantation foll...
Martins, Martinho A. S.; Machado, Ana I.; Serpa, Dalila; Prats, Sergio A.; Faria, Sílvia R.; Varela, María E. T.; González-Pelayo, ÓscarThe purpose of this study was to assess how terracing affected overland\nflow and associated sediment losses, at the micro-plot scale (0.25\nm(2)), in recently burnt stands of the two principal forest types in\nnorth-central Portugal, i.e. mono-specific stands of Maritime Pine and\nEucalypt. Terracing is an increasingly common practice of slope\nengineering in the study region but its impacts on runoff and eros...