TGPC: Greater Wellington letter to Chair, PCTG BOI - Attachment 2
TGPC: Greater Wellington letter to Chair, PCTG BOI - Attachment 2
TGPC: Greater Wellington letter to Chair, PCTG BOI - Attachment 2
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.Literature review of Porirua Harbour and catchmentAppendix 2: Annotated Bibliography2 upstream 'suitable'. POTirua Stream all sites 'doubtful', except Takapu Stream site'suitable'. Fancal conforms are high at all'doubtful' sites.Berry, A. (1998b). Annuallyeshwoier qwufity I'epori. WeSIern Welling<strong>to</strong>ll Region. 1997/98Resource Investigations Department, Welling10n Regional Council, Publication N" WRC/RINV-G-98115.Annual water quality survey results of streams and rivers in the <strong>Welling<strong>to</strong>n</strong> Region asinitiated in Cameron (1988). Similar <strong>to</strong> Berry (1996a) exceptthe Water Quality Index isdropped and water quality is no longer mapped. Measured 2 sites along the POTiruaStream and I each along HOTokiri and Pauatahanui Streams. Faecal conforms still high,but worse in Forirua Stream.Cameron, D. (1988). Baseline worer quufrty of rivers und SII'eoins 11/1he Welling <strong>to</strong>n Region 1987-88. <strong>Welling<strong>to</strong>n</strong> Regional Council and Regional Water Board, Water Resources Technical Report88-IBaseline water quality survey results of streams and rivers in the <strong>Welling<strong>to</strong>n</strong> RegionThe parameters measured were temperature, dissolved oxygen, conductivity, turbidity,pH, faecal conforms and 5-day biochemical oxygen demand. Data obtained is used <strong>to</strong>calculate and map a Water Quality Index, based on the "New Zealand Water Quality'General Use' Index" (Smith 1987) which ranks sites in reference 10 general use as"eminently suitable"; "suitable"; "doubtful"; "unsuitable" and "<strong>to</strong>tally unsuitable". Datapresented on the Macroinvertebrate Community Index (Starck 1985), which ranks sitesaccording <strong>to</strong> fauna diversity and taxa susceptibility <strong>to</strong> pollution. Presents rankings asmaps and gives appendix of raw data. Mapsinclude general maps of land use. Measured8 sites along the HOTokiri Stream, 6 along the Pauatahanui Stream and 8 along POTiruaStream. HOTokiri Stream 'suitable' along whole length, Pauatahanui Stream '<strong>to</strong>tallyunsuitable' upstream gradually improving <strong>to</strong> 'suitable' downstream, but becoming'doubtful' at the mouth. POTirua Stream doubtful' at upper and lower sites and 'suitable'at middle sites. High faecal conform counts appear <strong>to</strong> cause the low rankings of thesestreams.Cameron, D. (1991). Baseline warer quality of rivers und sirednis ill 1/1e Well^}1810/1 Region 1990-91. Consents and Investigations, <strong>Welling<strong>to</strong>n</strong> Regional Council, Technical Report 91-2Annual water quality survey results of streams and rivers in the <strong>Welling<strong>to</strong>n</strong> Region asinitiated in Cameron (1988). Similar <strong>to</strong> Cameron and Sand0 (1990) but also measuresnitrate and dissolved reactive phosphorus. Also identifies problem areas in the<strong>Welling<strong>to</strong>n</strong> area. HOTokiri Stream last six months of study, deterioration of upstreamsites, 5 'doubtful'. Panatahanui Stream improved water quality due <strong>to</strong> closure of piggeryon the Haywards Hillbranch, 4 upstream sites have improved from 'doubtful' <strong>to</strong> 'suitable'POTirua Stream improvement 2 sites now 'suitable', occasional industrial spills recorded.Compared with 87188 data, faecal conform counts have dropped on allstreamsCameron, D. (1993). Basel^^e water quality offlyei's and siredIlls in Ihe Welling<strong>to</strong>ll Region1992/93. Consents and Investigations, <strong>Welling<strong>to</strong>n</strong> Regional Council, Publication N"' WRC/CUT-93134Annual water quality survey results of streams and rivers in the <strong>Welling<strong>to</strong>n</strong> Region asinitiated in Cameron (1988). Similar <strong>to</strong> Cameron and Wall(1992). HOTokiri Stream 3sites dropped from 'suitable' <strong>to</strong> 'doubtful'. Pauatahanui Stream 4 sites dropped <strong>to</strong>doubtful'; rest are 'suitable'. POTirua Stream ranked in the bot<strong>to</strong>m 10 streams for the<strong>Welling<strong>to</strong>n</strong> area, with allsites 'doubtful'. Takapu Stream and POTirua Stream identified asareas with high concentrations of nutrients, likely <strong>to</strong> cause nuisance algal growths.Reportfor Porirua City Council & <strong>Welling<strong>to</strong>n</strong> City CouncilBlaschke and Rutherford Environmental ConsultantsFebruary 201016