Hans Bertil Wittgren

A tool to support upstream work

Magnus Arnell, Hans Bertil Wittgren, M. Berbeyer Cuevas, 2017 .

Modelling nitrogen removal in potential wetlands at the catchment scale

Berit Arheimer, Hans Bertil Wittgren, B. Arheimer, 2002 .

Landscape planning to reduce coastal eutrophication: agricultural practices and constructed wetlands

Berit Arheimer, Hans Bertil Wittgren, B. Arheimer, 2004 .

Wastewater treatment wetlands in cold climates

Hans Bertil Wittgren, Trond Mæhlum, H. Wittgren, 1997 .

An Actor Game on Implementation of Environmental Quality Standards for Nitrogen in a Swedish Agricultural Catchment

Hans Bertil Wittgren, Roger Thunvik, Anna Pettersson, 2005 .

Generic structures of decision support systems for evaluation of policy measures to reduce catchment-scale nitrogen fluxes

Anders Grimvall, Hans Bertil Wittgren, Åsa Forsman, 2003 .

Riverine input of nutrients to the Gulf of Riga - temporal and spatial variation

Per Stålnacke, Anders Grimvall, Hans Bertil Wittgren, 1999 .