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4647 EMT 14-13 Soil Quality of Cropping Soils in Hawke's Bay 2014
Author(s): Katie Beecroft
Publication Date: 1 June 2014
Publication Number: 4647
4874 Waihua fish survey 2014
Publication Date: 1 May 2014
Publication Number: 4874
4875 Waikari fish survey
Publication Date: 1 May 2014
Publication Number: 4875
4872 RM16-53 Field Survey of the Fish Populations of the Lower Mohaka River 2014
Author(s): Glenn Maclean
Publication Date: 1 May 2014
Publication Number: 4872
Hawkes Bay Climate NIWA
Author(s): P.R. Chappell
Publication Date: 1 May 2014
Publication Number: 5177
4642 Tutaekuri, Ahuriri, Ngaruroro, Karamu Catchments Riparian Assessment 2014
Author(s): Keiko Hashiba
Publication Date: 1 April 2014
Publication Number: 4642
4611 RM14-03 Hawkes Bay Region Background Soil Concentrations for Managing Soil Quality
Author(s): Jo-Anne Cavanagh
Publication Date: 1 April 2014
Publication Number: 4611
4873 RM16-54 Field Survey of the Fish Populations of the Lower Ngaruroro River 2014
Author(s): Glenn Maclean
Publication Date: 1 March 2014
Publication Number: 4873
4600 AM 14-02 Hawke's Bay Climate and Hazards Report
Author(s): PD Komar, E Harris
Publication Date: 1 March 2014
Publication Number: 4600
Lake Tutira is located 30 km north of Napier and is an important recreational resource for the Hawke’s Bay region. The lake has an area of 1.74 km2, mean depth of 21 m and maximum depth of 42 m. It has a recent history of poor water quality, and over 2011 and 2012 there were severe blooms of blue–green algae (cyanobacteria), which detracted from the ecological and aesthetic value of the lake, and impacted on its suitability for recreational use.
We analysed the recently–available (2009–2012) monitoring data for Lake Tutira, which included periods of regular (c. monthly) water quality monitoring measurements, as well as data from an automated high–frequency monitoring buoy. Poor water quality in Lake Tutira is not a recent problem and TLI values in the 1960s and 1970s were higher than those for the analysis period. High–frequency buoy data demonstrated that high–intensity rainfall events produced rapid increases in water level and increased turbidity. Increases in chlorophyll fluorescence a few days after major rainfall events indicate that rainfall events may also stimulate increases in phytoplankton biomass in the lake via increased nutrient inputs associated with stormflows.
Author(s): Jonathan Abell, Chris G. McBride, & David P. Hamilton
Publication Date: 1 March 2014
Publication Number: 4776
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