New Zealand Journal of Marine and Freshwater Research abstracts

---

Physical and chemical limnology of six hydroelectric lakes on the Waikato River, 1970-72

C. H. D. Magadza*

Department of Zoology, University of Auckland, Auckland, New Zealand

Abstract The Waikato River flows from oligotrophic Lake Taupo through eight impoundments to the sea. As it does so, physico-chemical changes occur; conductivity and dissolved oxygen levels decrease, patterns in the seasonal variation in pH and alkalinity change, and the nitrogen and phosphorus concentrations increase. Except for the changes in conductivity, changes in the other parameters are characteristic of eutrophication. This eutrophication is associated with an increase in the intensity of pastoral farming in the catchment of the Waikato River downstream of Lake Taupo.

New Zealand journal of Marine & Freshwater Research, 1979, 13 (4): 561-572
Received 10 June 1977; revision received 22 May 1979

PDF file of entire paper: medium quality (986K); (scanned from paper original: notes about this process)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page