Porirua Harbour Seminar Series - Pres 2 - Porirua Harbour History of Land Use

7/29/2019 Porirua Harbour Seminar Series - Pres 2 - Porirua Harbour History of Land Use

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Keith Calder, 21 October 2009Keith Calder, 21 October 2009

PoriruaPorirua HarbourHarbour CatchmentCatchment

Land Use ChangesLand Use Changes


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Time lineTime line

Source: Chris Hollis, GNS


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Wellington RegionWellington RegionHistoricHistoric IndigenousIndigenous Vegetation Loss 1Vegetation Loss 1

PrePre--HumanHuman

Source: Geographx NZ Ltd


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18401840



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PresentPresent


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Wellington RegionWellington RegionPresent Land CoverPresent Land Cover

Source: NZ Land Cover Data Map


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Wellington RegionWellington Region

CurrentCurrent CatchmentCatchment Forest CoverForest Cover

Source: GWRC


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Porirua Map 1846Porirua Map 1846

Source: www.matapihi.org.nz


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Porirua Bay 1920Porirua Bay 1920--19251925

William George BakerWilliam George Baker


[Porirua Harbour]

surrounded withlow wooded hills forseveral miles.

1850. Godley

(1936)


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Source: www.mataphi.org.nz)

This is the worst country I eversaw for field operations. Theforest is so thick as to be

almost impenetrable. It iseverywhere a mass ofevergreen trees and shrubs

matted and twined togetherwith supplejack creepers andwild vines.Tyrone Power 1849

New Zealand forest near Porirua 1847.New Zealand forest near Porirua 1847.

GeorgeGeorge AngasAngas


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Porirua Road 1853Porirua Road 1853watercolourwatercolour by Ltby Lt--Col. W.A.Col. W.A. McClevertyMcCleverty

Two sketches byColonel

W.A.McCleverty ofPorirua Road 1853and Horokiwi Valleyin 1854 show thick

bush cover of rimu,tawa, rewarewa,nikau and treefern.Healy 1980


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Original subdivisionOriginal subdivision

New Zealand Company map of first settlements 1842

Porirua Village layout 1841

Source: Healy (1980)


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MillingMilling

Hurley & Carter

sawmill 1863.John Bradey 1926

Kaiwharawhara Mill 1843.S. C. Brees.



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ChangeChange

Pauatahanui catchment(Healy 1980)

Mid 1800s - two-thirds still in native forest.

By 2000 - two thirds was grassland.


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Urban DevelopmentUrban Development



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EarlyEarly WhitbyWhitby DevelopmentDevelopment



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Land Use 1941Land Use 1941--4242



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Land Use 1973Land Use 1973--7474



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Land Use 2000Land Use 2000



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Trends from 1942 to 2000Trends from 1942 to 2000



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Rural erosionRural erosion



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Urban earthworks & siltUrban earthworks & silt

Whitby & Browns Bay 1970s Source: Chris Hollis, GNS


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StormwaterStormwater

Photos: K Calder


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Nutrient enrichmentNutrient enrichment

Photo: K. Calder


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LitterLitter

Photo: K. Calder


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CamborneCamborne

PukeruaPukerua BayBay

Duck Creek/Duck Creek/

SilverwoodSilverwoodAoteaAotea

BlockBlockPorirua HospitalPorirua Hospital

ChurtonChurton ParkParkNorthNorth

LincolnshireLincolnshire

FarmFarm

NewlandsNewlands

FUTUREFUTURE

PORIRUA BASINPORIRUA BASIN

DEVELOPMENTSDEVELOPMENTS

Transmission Gully Motorway

Future Urban Development

Rural Development

Forestry Harvesting

Wind Farm Development

Catchment Boundaries

Local Authority Boundaries

Major Roads

Main Trunk Railway

100% of Wellington Citysgreenfield development

50% of Wellington regions

urban growth

Urban subdivision

Rural/residential intensificationRoading

Windfarms

Forest harvesting

Potential FuturePotential Future

DevelopmentsDevelopments


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FutureFuture catchmentcatchment issuesissues

Climate change and sea-level rise

Further urbanisation & roading

Documents

Porirua Harbour Seminar Series - Pres 2 - Porirua Harbour History of Land Use