Theo H van der Meer

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All energy scenarios show a shift toward an increased percentage of renewable energy sources, including biomass. This study gives an overview of water footprints (WFs) of bioenergy from 12 crops that currently contribute the most to global agricultural production: barley, cassava, maize, potato, rapeseed, rice, rye, sorghum, soybean, sugar beet, sugar cane,(More)
In response to our article on the blue and green water footprint (WF) of bioenergy (1), others propose to multiply each blue WF component by a water-stress index and neglect green WFs, because impacts would be nil (2). They propose to redefine the WF from a volumetric measure to an index resulting from multiplying volumes by impact factors. Framing their(More)
The oscillatory flow through tapered cylindrical tube sections (jet pumps) is characterized by a numerical parameter study. The shape of a jet pump results in asymmetric hydrodynamic end effects which cause a time-averaged pressure drop to occur under oscillatory flow conditions. Hence, jet pumps are used as streaming suppressors in closed-loop(More)
Between 1938 and 1968 some 400 sex offenders in the Netherlands who by court orders had been put at 'the discretion of the government' and were incarcerated in asylums for the criminally insane, 'voluntarily' submitted themselves to 'therapeutic' castration, the surgical removal of their testes. Prior to 1938, inspired by a Danish castration act from 1929,(More)
The water footprint (WF) of a product refers to freshwater consumed during production (1). We calculated bioenergy WFs assuming crop water requirements are met (2); Jong-schaap et al. (3) correctly point out that this is not always true, giving an example for jatropha grown under poor, rain-fed conditions in South Africa. Yields are generally expressed in(More)
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