Articles | Volume 20, issue 6
https://doi.org/10.5194/hess-20-2395-2016
https://doi.org/10.5194/hess-20-2395-2016
Comment/reply
 | 
20 Jun 2016
Comment/reply |  | 20 Jun 2016

Comment on "Using groundwater age and hydrochemistry to understand sources and dynamics of nutrient contamination through the catchment into Lake Rotorua, New Zealand" by Morgenstern et al. (2015)

Jonathan M. Abell, David P. Hamilton, and Christopher G. McBride

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We comment on "Using groundwater age and hydrochemistry to understand sources and dynamics of nutrient contamination through the catchment into Lake Rotorua, New Zealand" by Morgenstern et al. (2015). They propose that "the only effective way to limit algae blooms and improve lake water quality in such environments is by limiting the nitrate load". We outline four reasons why it is important to instead limit both phosphorus and nitrogen loads to this iconic lake, consistent with current policy.