Abstract: The water quality of Lake Rotorua has deteriorated since the 1960s because of excessive phytoplankton growths caused by increased inputs of phosphorus and nitrogen from the Rotorua city sewage treatment plant. Removal of ...

Abstract: A computer model for epilithic algae and grazer biomass in streams is modified to better predict the effects of temperature and is calibrated for diatoms and mayflies. Mayflies are predicted to maintain low diatom biomass ...

Abstract: In porous-bed rivers, dunes and other irregularities cause an uneven pressure distribution, which “pumps” small amounts of water through the sediments. A simple analytical model is developed to estimate the contribution ...