#432641 1

Greater Wellington Regional Council

Greater Wellington Water

Hutt River Low Flow Management Plan (HRLFMP)

Status: Draft –September 2010.

1. Goal

To minimise the environmental impacts of water abstraction during periods of low flow in the Hutt River.

2. Objectives

The objectives of this plan are:

1. To minimise the impact of water abstraction during periods of low flow on the Hutt River ecosystem.

2. To describe specific actions to be taken when flows below identified trigger points occur.

3. To facilitate on-going liaison with stakeholders.

4. To determine the nature and scale of any impacts by monitoring aspects of the ecosystem during periods of low flow.

5. To provide a mechanism for reviewing the plan should objectives 1, 2 and 3 not be achieved to the satisfaction of all parties.

6. To explore practical mitigation options should monitoring results indicate degradation of the ecosystem.

3. Stakeholders

3.1 Principal stakeholders

The principal stakeholders associated with the issues described in this plan are:

The Environment Management Division of Greater Wellington Regional Council (GWRC)

Fish and Game (NZ)

2

Department of Conservation

The Hutt City Council

Upper Hutt City Council

The Water Supply, Parks and Forests Division of Greater Wellington Regional Council (referred to in this document as Greater Wellington Water or GWW)

The Port Nicholson Block Settlement Trust (Taranaki Whanui ki te Upoko o te Ika)

3.2 Secondary stakeholders

Other stakeholders impacted by the outcomes of this plan, but less directly involved include:

Wellington City Council

Porirua City Council

Recreational river users.

4. Roles and responsibilities

The roles and responsibilities of the principal stakeholders are set out in the table on the next page:

#432

641

3

Stak

ehol

der

Rol

eR

espo

nsib

ility

Gre

ater

Wel

lingt

on W

ater

App

lican

tTo

mon

itor

the

flow

at

the

Birc

hvill

e riv

er s

tage

rec

ordi

ng s

ite

(Site

No.

298

18)

To m

onito

r the

flow

at t

he K

aito

ke W

eir

To t

ake

actio

ns a

s se

t ou

t in

thi

s pl

an w

here

tho

se a

ctio

ns a

re

unde

r the

dire

ct c

ontro

l of G

WW

.To

req

uest

oth

ers

to t

ake

actio

ns a

s se

t ou

t in

thi

s pl

an w

here

th

ese

actio

ns a

re n

ot u

nder

the

dire

ct c

ontro

l of G

WW

.To

und

erta

ke o

r ar

rang

e ad

ditio

nal

mon

itorin

g as

set

out

in

the

mon

itorin

g pl

an a

nd lo

w fl

ow m

onito

ring

as se

t out

in th

is p

lan.

To p

repa

re a

n an

nual

rep

ort c

over

ing

the

issu

es a

s se

t out

in th

e pl

an a

nd d

istri

bute

cop

ies

to a

ll st

akeh

olde

rs (

by 3

0 Se

ptem

ber

each

yea

r cov

erin

g th

e pr

evio

us Ju

ly to

June

per

iod)

.To

coo

rdin

ate

a re

view

of t

he p

lan

if th

is is

con

side

red

nece

ssar

y by

any

one

of t

he p

rinci

pal s

take

hold

erso

r at G

WW

vol

ition

.To

coo

rdin

ate

a re

view

of t

he m

onito

ring

plan

if th

is is

con

side

red

nece

ssar

y by

any

one

of

the

prin

cipa

l st

akeh

olde

rs o

r at

GW

W

volit

ion.

The

revi

ew to

be

com

plet

ed a

nd a

ny m

odifi

catio

ns to

the

mon

itorin

g pl

an a

gree

d pr

ior t

o 1

Dec

embe

r.G

WR

C E

nviro

nmen

t M

anag

emen

t Div

isio

nR

egul

ator

To e

nsur

e th

at th

e co

nditi

ons c

onta

ined

in th

e re

sour

ce c

onse

nt, o

f w

hich

thi

s pl

an i

tsel

f is

a c

ondi

tion,

are

ful

ly c

ompl

ied

with

by

the

cons

ent h

olde

r.To

rev

iew

ann

ual

repo

rts p

repa

red

by G

WW

and

to

call

for

are

view

of t

his p

lan

if a

revi

ew is

con

side

red

nece

ssar

y.A

ppro

ve a

ny c

hang

es to

the

mon

itorin

g pl

anFi

sh a

nd G

ame

(NZ)

Rep

rese

ntin

g th

e in

tere

sts o

f ang

lers

To re

view

ann

ual r

epor

ts p

repa

red

by G

WW

.To

und

erta

ke m

onito

ring

of th

e ec

olog

y of

the

Hut

t Riv

er a

s th

ey

see

fit.

To c

all

for

a re

view

of

this

pla

n if

a re

view

is

cons

ider

ed

nece

ssar

y

4

To c

all f

or a

revi

ew o

f Mon

itorin

g Pl

an if

con

side

red

nece

ssar

y.D

epar

tmen

t of C

onse

rvat

ion

Prot

ectin

g th

e riv

er e

colo

gyTo

revi

ew a

nnua

l rep

orts

pre

pare

d by

GW

W.

Toun

derta

ke m

onito

ring

of th

e ec

olog

y of

the

Hut

t Riv

er a

s th

ey

see

fit.

To c

all

for

a re

view

of

this

pla

n if

a re

view

is

cons

ider

ed

nece

ssar

y.To

cal

l for

a re

view

of M

onito

ring

Plan

if c

onsi

dere

d ne

cess

ary.

Port

Nic

hols

on B

lock

Se

ttlem

ent T

rust

Safe

guar

ding

the

tradi

tiona

l and

hi

stor

ical

cul

tura

l and

spiri

tual

val

ues o

f th

e iw

i.

To re

view

ann

ual r

epor

ts p

repa

red

by G

WW

.To

requ

est a

dditi

onal

mon

itorin

g of

the

ecol

ogy

of th

e H

utt R

iver

if

they

see

the

need

.To

cal

l fo

r a

revi

ew o

f th

is p

lan

if a

revi

ew i

s co

nsid

ered

ne

cess

ary.

To c

all f

or a

revi

ew o

f Mon

itorin

g Pl

an if

con

side

red

nece

ssar

y.H

utt C

ity C

ounc

il.Pr

otec

ting

the

inte

rest

s of

Low

er H

utt

Val

ley

resi

dent

s.To

revi

ew a

nnua

l rep

orts

pre

pare

d by

GW

W.

To re

ques

t add

ition

al m

onito

ring

of th

e ec

olog

y of

the

Hut

t Riv

er

if th

ey se

e th

e ne

ed.

To c

all

for

a re

view

of

this

pla

n if

a re

view

is

cons

ider

ed

nece

ssar

y.U

pper

Hut

t City

Cou

ncil.

Prot

ectin

g th

e in

tere

sts

of U

pper

Hut

t V

alle

y re

side

nts.

To re

view

ann

ual r

epor

ts p

repa

red

by G

WW

.To

requ

est a

dditi

onal

mon

itorin

g of

the

ecol

ogy

of th

e H

utt R

iver

if

they

see

the

need

.To

cal

l fo

r a

revi

ew o

f th

is p

lan

if a

revi

ew i

s co

nsid

ered

ne

cess

ary.

#432641 5

5. Background monitoring

5.1 General

Background environmental monitoring that provides a baseline against which to compare any ecological changes that may arise is available from GWRC records of state of the environmentmonitoring and from NIWA national monitoring programmes.

Fish numbers have been monitored by Fish and Game since 1999.

5.2 River flow

Flow in the Hutt River is continuously monitored at Kaitoke and Birchville by NIWA, and at Te Marua and Taita by the GWRC Environment Division. This work is carried out in accordance with relevant national standards regarding accuracy etc.

5.3 River water quality

A programme of water quality monitoring is run by the Environment Division of GWRC. Historically four sites, Te Marua (site FB22), Birchville (site FB23), Manor Park Site FB 24) and upstream of Melling (site FB 25) were monitored, but current monitoring is limited to sites at Te Marua, Manor Park and Boulcott (site RS 22).

Parameters monitored include temperature, ammoniacal nitrogen, filamentous periphyton cover, WQI grade, MCI grade and SQMCI grade.

5.4 Water use

GWW monitors the use of water on a daily basis. Water supplied from each treatment plant and delivered to each of the 47 points of supply is monitored. This information is converted into gross daily use per head on a city by city basis using the latest Statistics NZ population figures, averaged over the June/June reporting year.

5.5 Proposed additional monitoring

A Monitoring Plan has been prepared which covers water quality, macroinvertebrates and periphytons.

5.6 Low flow monitoring

Additional monitoring is to be undertaken in response to low flows. The detail of this is set out in the Monitoring Plan.

6

6. Actions to be taken under low flow conditions

6.1 General

The intent of the actions set out Appendix 1 of this plan is to maintain the flow at Birchville above 2,700 L/sec for as long as is practicable, given the need to provide an adequate supply of water to the people in the region and the uncertainties of the climate. The matrix contained in Appendix 1 sets out trigger points, a range of system management actions and a range of monitoring requirements. It also refers to a series of communication, education, water use limitation and enforcement actions set out in the GWW Summer Water Demand Management Plan contained in Appendix 2.

6.2 Trigger points

Trigger points are established directly in terms of the river flow measured at Kaitoke weir and Birchville and the duration for which these flows are below the various threshold values. GWW will use telemetered real time information from the river gauging station at Birchville and the control system at Kaitoke to enable actions to be initiated at the nominated trigger points.

The initial trigger point is set at a flow less than 3,500 L/sec for more than five consecutive days at Birchville or the flow downstream of Kaitoke Weir less than 620 L/sec for more than five consecutive days.

The level 3 trigger of flow is less than 2,700 for more than twenty days or less than 2,000 L/sec for more than five consecutive days at Birchville or flow downstream of Kaitoke Weir less than 620 L/sec for more than thirty consecutive days. This is based approximately on a flow which maintains 75% of the MALF habitat (2,040 L/sec) at Birchville. Statistically this flow occurs for less than 4% of the time.

The level 5 trigger of flow less than 1,600 L/sec for more than twenty consecutive days, or less than 1,300 L/sec for more than five consecutive days at Birchville or flow downstream of Kaitoke Weir less than 620 L/sec for more than sixty consecutive days. This based on maintaining 50% of MALF habitat (1,260 L/sec) at Birchville and meeting the minimum flow of 1200 L/sec at Birchville as specified in the Regional Water Plan. Statistically this flow occurs for less than 1% of the time.

Note: these flows have been derived by Dr Henry Hudson, see Appendix 3.

More intensive demand management, system management and monitoring actions will be introduced as the flow drops as shown in Appendices 1 and 2. and as set out in the draft Monitoring Plan.

6.3 Demand management actions

Actions aimed at reducing the use of water are set out in Appendix 2.

Implementing actions such as formally notifying bylaws, policing watering restrictions and bringing prosecutions against offenders will require the cooperation of the Territorial Authorities listed in

7

section 2.2. Bylaws in place in each of the four cities are essentially the same. Copies of the current city garden watering bylaws are contained in Appendix 4. Note that Wellington City Council has a Customer Charter rather than a bylaw. The charter includes watering restrictions similar to those of the other cities, but Wellington City Council would use the Local Government Act provisions to enforce compliance if necessary. Appendix 5 is a letter from Capacity Infrastructure Services which confirms in the first paragraph on page 2 that the TAs represented by Capacity will take action under their bylaws in accordance with the trigger levels in the HRLFMP if necessary. (note that other suggestions contained in this letter have been taken note of and changes made to align the HRFPMP with the Water Restriction Trigger Matrix)

6.4 System management actions

Actions aimed at reducing reliance on the Kaitoke source of water are listed in Appendix 1. However the practicability of implementing these actions depends on aspects such as the availability of water from other sources, compliance with resource consents applicable to other sources and the need to conserve water stored in the Stuart Macaskill Lakes and the Waiwhetu Aquifer to cater for worsening drought conditions should they occur later in summer.

6.5 Monitoring

The Monitoring Plan (Appendix 7 to the consent condition variation application) sets out monitoring requirements in respect of low flows. Monitoring actions are linked to the trigger levels in Appendix 1.

7. Reporting

An annual report will be prepared by GWW.

The report will contain the following;Summary of water useage and sources

Summary of river hydrology

Water quality results (pH, temperature and dissolved oxygen)

Macroinvertebrate survey results

Periphyton monitoring results

Cynobacteria monitoring results

The report will cover the period 1st July to 30th

The report will be completed by 30 September each year and copies provided to all the principal stakeholders listed in section 3.1.

June.

8

8. Review

If any one of the principal stakeholders is unhappy with the outcomes described in the annual reportthen they have the right to call a meeting of all principal stakeholders to discuss these outcomes and to suggest changes to the HRLFMP which might mitigate the impacts of low flows in the future.GWW may also seek a review of the HRLFMP on its own volition.

9

Appendix 1

Schedule of flow trigger points. demand management actions, system management actions and monitoring. (Document #452194)

#452

194

APP

EN

DIX

1

HU

TT

RIV

ER

LO

W F

LO

W M

AN

AG

EM

EN

T P

LA

N

Act

ions

to b

e ta

ken

by G

reat

er W

ellin

gton

Wat

er to

red

uce

dem

and,

bas

ed o

n flo

w in

the

Hut

t Riv

er a

t Bir

chvi

lle

Tri

gger

poi

ntD

eman

d M

anag

emen

t Act

ion

Flow

mea

sure

d at

Bir

chvi

lle r

iver

re

cord

er st

aton

unl

ess s

tate

d ot

herw

ise

With

Ref

eren

ce to

Dro

ught

M

anag

emen

t Pla

n ag

reed

bet

wee

n G

WW

and

City

Cou

ncils

.

Plan

t or

sour

ceA

ctio

nC

ondi

tions

Act

ion

Freq

uenc

yR

esou

rce

Mon

itor w

ater

use

.D

aily

GW

WW

ater

qua

lity

mon

itorin

g (f

ield

mea

sure

men

t of w

ater

te

mpe

ratu

re, d

isso

lved

oxy

gen

and

pH) a

t Birc

hvill

e.A

s set

out

in th

e ag

reed

m

onito

ring

plan

Perip

hyto

n co

ver o

f riv

er b

ed (v

isual

ass

essm

ent o

f % c

over

) at

Birc

hvill

e.A

s set

out

in th

e ag

reed

m

onito

ring

plan

Wai

nui/O

rong

oron

goM

axim

ise

abstr

actio

nR

esou

ce c

onse

nt c

ondi

tions

met

.M

onito

r wat

er u

se.

Dai

lyG

WW

McE

wan

Par

k le

vel >

the

hist

oric

al m

onth

ly

aver

age

if da

te <

28

Febr

uary

Wat

er q

ualit

y m

onito

ring

(fie

ld m

easu

rem

ent o

f wat

er

tem

pera

ture

, dis

solv

ed o

xyge

n an

d pH

) at B

irchv

ille.

As s

et o

ut in

the

agre

ed

mon

itorin

g pl

anPe

riphy

ton

cove

r of r

iver

bed

(visu

al a

sses

smen

t of %

cov

er)

at B

irchv

ille.

As s

et o

ut in

the

agre

ed

mon

itorin

g pl

an

Iden

tifia

tion

of d

omin

ant a

lgae

taxa

As s

et o

ut in

the

agre

ed

mon

itorin

g pl

anM

acro

inve

rtebr

ate

surv

ey to

show

Tax

a ric

hnes

s, M

CI,

SQM

CI a

nd %

EPT,

at B

irchv

ille

As s

et o

ut in

the

agre

ed

mon

itorin

g pl

anW

ainu

i/Oro

ngor

ongo

Max

imis

e ab

strac

tion

Res

ouce

con

sent

con

ditio

ns m

et.

Mon

itor w

ater

use

.D

aily

GW

W

McE

wan

Par

k le

vel <

0.3

met

ers b

elow

the

hist

oric

al m

onth

ly a

vera

ge if

dat

e <

28 F

ebru

ary.

Wat

er q

ualit

y m

onito

ring

(fie

ld m

easu

rem

ent o

f wat

er

tem

pera

ture

, dis

solv

ed o

xyge

n an

d pH

) at B

irchv

ille.

As s

et o

ut in

the

agre

ed

mon

itorin

g pl

an

McE

wan

Par

k le

vel <

0.5

met

ers b

elow

the

hist

oric

al m

onth

ly a

vera

ge if

dat

e >

28 F

ebru

ary.

Perip

hyto

n co

ver o

f riv

er b

ed (v

isual

ass

essm

ent o

f % c

over

) at

Birc

hvill

e.A

s set

out

in th

e ag

reed

m

onito

ring

plan

Lake

s > 8

5% fu

ll if

date

< 2

8 Fe

brua

ryId

entif

iatio

n of

dom

inan

t alg

ae ta

xaA

s set

out

in th

e ag

reed

m

onito

ring

plan

Lake

s > 6

0% fu

ll if

date

> 2

8 Fe

brua

ry.

Mac

roin

verte

brat

e su

rvey

to sh

ow T

axa

richn

ess,

MC

I, SQ

MC

I and

%EP

T, a

t Birc

hvill

eA

s set

out

in th

e ag

reed

m

onito

ring

plan

Wai

nui/O

rong

oron

goM

axim

ise

abstr

actio

nR

esou

ce c

onse

nt c

ondi

tions

met

.M

onito

r wat

er u

se.

Dai

lyG

WW

McE

wan

Par

k le

vel <

0.5

met

ers b

elow

the

hist

oric

al m

onth

ly a

vera

ge if

dat

e <

28 F

ebru

ary.

Wat

er q

ualit

y m

onito

ring

(fie

ld m

easu

rem

ent o

f wat

er

tem

pera

ture

, dis

solv

ed o

xyge

n an

d pH

) at B

irchv

ille.

As s

et o

ut in

the

agre

ed

mon

itorin

g pl

an

McE

wan

Par

k le

vel <

1.0

met

ers b

elow

the

hist

oric

al m

onth

ly a

vera

ge if

dat

e >

28 F

ebru

ary.

Perip

hyto

n co

ver o

f riv

er b

ed (v

isual

ass

essm

ent o

f % c

over

) at

Birc

hvill

e.A

s set

out

in th

e ag

reed

m

onito

ring

plan

Lake

s > 8

0% fu

ll if

date

< 2

8 Fe

brua

ryId

entif

iatio

n of

dom

inan

t alg

ae ta

xaA

s set

out

in th

e ag

reed

m

onito

ring

plan

Lake

s >50

% fu

ll if

date

> 2

8 Fe

brua

ry.

Mac

roin

verte

brat

e su

rvey

to sh

ow T

axa

richn

ess,

MC

I, SQ

MC

I and

%EP

T, a

t Birc

hvill

eA

s set

out

in th

e ag

reed

m

onito

ring

plan

Wai

nui/O

rong

oron

goM

axim

ise

abstr

actio

nR

esou

ce c

onse

nt c

ondi

tions

met

.M

onito

r wat

er u

se.

Dai

lyG

WW

McE

wan

Par

k le

vel <

0.5

met

ers b

elow

the

hist

oric

al m

onth

ly a

vera

ge if

dat

e <

28 F

ebru

ary.

Wat

er q

ualit

y m

onito

ring

(fie

ld m

easu

rem

ent o

f wat

er

tem

pera

ture

, dis

solv

ed o

xyge

n an

d pH

) at B

irchv

ille.

As s

et o

ut in

the

agre

ed

mon

itorin

g pl

an

McE

wan

Par

k le

vel <

1.0

met

ers b

elow

the

hist

oric

al m

onth

ly a

vera

ge if

dat

e >

28 F

ebru

ary.

Perip

hyto

n co

ver o

f riv

er b

ed (v

isual

ass

essm

ent o

f % c

over

) at

Birc

hvill

e.A

s set

out

in th

e ag

reed

m

onito

ring

plan

Lake

s >80

% fu

ll if

date

< 2

8 Fe

brua

ryId

entif

iatio

n of

dom

inan

t alg

ae ta

xaA

s set

out

in th

e ag

reed

m

onito

ring

plan

Lake

s >40

% fu

ll if

date

> 2

8 Fe

brua

ry.

Mac

roin

verte

brat

e su

rvey

to sh

ow T

axa

richn

ess,

MC

I, SQ

MC

I and

%EP

T, a

t Birc

hvill

eA

s set

out

in th

e ag

reed

m

onito

ring

plan

Not

e 1:

Ref

eren

ce d

ocum

ent #

4521

94

Res

tric

tion

Lev

el

Lev

el 2

Flow

less

than

3,5

00 L

/sec

for m

ore

than

fiv

e da

ys.

Flo

w

dow

nstre

am o

f Kai

toke

wei

r les

s tha

n 62

0 L/

sec

for m

ore

than

five

day

s.

Lev

el 1

Mon

itori

ngSy

stem

Man

agem

ent A

ctio

n

Res

trict

ion

Leve

l 1R

esou

ce c

onse

nt c

ondi

tions

met

.M

axim

ise

abstr

actio

nW

ainu

i/Oro

ngor

ongo

Polic

ing

of w

ater

ing

rest

rictio

ns w

ill b

e pr

imar

ily th

e re

spon

sibi

lity

of th

e C

ity

Cou

ncils

und

er th

e pr

ovis

ions

of t

he a

gree

d de

man

d m

anag

emen

t pla

n.

Flow

less

than

3,5

00 L

/sec

for m

ore

than

tw

enty

day

s or l

ess t

han

2,70

0 fo

r mor

e th

an fi

ve d

ays.

Flo

w

dow

nstre

am o

f Kai

toke

wei

r les

s tha

n 62

0 L/

sec

for m

ore

than

twen

ty d

ays.

Res

trict

ion

Leve

l 2

Max

imise

ab

strac

tion

Flow

less

than

2,7

00 fo

r mor

e th

an

twen

ty d

ays o

r les

s tha

n 2,

000

L/se

c fo

r m

ore

than

five

day

s

Res

trict

ion

Leve

l 3

Te M

arua

Lak

esPr

ovid

e 30

% o

f w

ater

to T

e M

arua

pl

ant.

Max

imise

ab

strac

tion

Wat

erlo

o

McE

wan

Par

k le

vel <

0.3

met

ers b

elow

the

hist

oric

al m

onth

ly a

vera

ge if

dat

e >

28 F

ebru

ary.

Lev

el 3

Wat

erlo

oM

axim

ise

abstr

actio

n

Wat

erlo

o

Prov

ide

20%

of

wat

er to

Te

Mar

ua

plan

t.

Te M

arua

Lak

es

Lev

el 4

Flow

less

than

2,0

00 L

/sec

for m

ore

than

tw

enty

day

s, le

ss th

an 1

,600

L/s

ec fo

r m

ore

than

five

day

s.

Res

trict

ion

Leve

l 4

Wat

erlo

oM

axim

ise

abstr

actio

n

Te M

arua

Lak

esPr

ovid

e 40

% o

f w

ater

to T

e M

arua

pl

ant.

Lev

el 5

Flow

less

than

1,6

00 L

/sec

for m

ore

than

tw

enty

day

s, or

less

than

1,3

00 L

/sec

.R

estri

ctio

n Le

vel 5

#432641 11

Appendix 2

Greater Wellington Water Summer Water Demand Management Plan.

#432

641

12

AP

PE

ND

IX 2

Sum

mer

Wat

er D

eman

d M

anag

emen

t Pla

nW

ater

Res

trict

ion

Leve

ls a

nd C

omm

unic

atio

nsT

o b

e r

ead

in

co

nju

ncti

on

wit

h 'W

ate

r R

estr

icti

on

Level T

rig

ger

Ma

trix

'

Last

upd

ated

7/5

/200

9

Restr

icti

on

le

vel

Resp

on

se t

yp

eA

dvert

isin

g (

inclu

din

g c

ou

ncil

'n

ew

s' an

d w

eb

sit

e)

Ad

vert

isin

g F

req

uen

cy

Med

iaG

uid

e T

arg

et

Dem

an

d

Maxim

um

Base

Stan

dard

odd

s/ev

ens

wat

erin

g ru

les

City

cou

ncils

eac

h to

pub

licis

e w

ater

ing

rest

rictio

ns /

byla

w a

t st

art o

f eac

h sp

ring/

sum

mer

sea

son

via

'in-h

ouse

' cha

nnel

s.

GW

RC

to ru

n st

anda

rd S

umm

er W

ater

Con

serv

atio

n (S

WC

) ad

verti

sing

dur

ing

Janu

ary

and

Febr

uary

, with

sta

rt da

te

flexi

ble

depe

ndin

g o

Freq

uenc

y of

pai

d-fo

r adv

ertis

ing

of re

stric

tions

/ by

law

at

disc

retio

n of

city

cou

ncils

. GW

RC

SW

C s

ched

ule

(Jan

an

d Fe

b) b

ased

on

med

ium

wei

ght o

f exp

osur

e

City

cou

ncils

to p

ublic

ise

indi

vidu

al re

stric

tion

/ byl

aw

deta

ils in

spr

ing

and

at le

ast m

onth

ly u

ntil

end

of F

eb.

GW

RC

SW

C m

edia

bas

ed o

n ad

vice

from

adv

ertis

ing

agen

cy (c

urre

ntly

pre

ss a

nd c

omm

erci

al ra

dio)

Nov

-Dec

pea

k da

y <

180

and

< 19

5ML/

d Ja

n-M

ar

1St

anda

rd o

dds/

even

s w

ater

ing

rule

s +

join

t adv

ertis

ing

Join

t wat

erin

g re

stric

tions

adv

ertis

ing

by G

WR

C (t

o al

ert

publ

ic to

ons

et o

f tou

gher

sup

ply/

dem

and

situ

atio

n an

d re

min

d ab

out r

estri

ctio

n le

vel a

ctiv

e). G

WR

C S

WC

ad

verti

sing

con

tinue

s (if

act

ive)

.

Fortn

ight

ly jo

int w

ater

ing

rest

rictio

n ad

verti

sing

unt

il po

sitio

n im

prov

es O

R n

ext r

estri

ctio

n le

vel a

ctiv

ated

. G

WR

C S

WC

sch

edul

e ba

sed

on m

ediu

m w

eigh

t of

expo

sure

Med

ia s

tate

men

t by

GW

RC

. Fur

ther

rele

ases

as

appr

opria

te if

ove

rall

posi

tion

wor

sens

. Cal

l for

car

eful

w

ater

use

, with

link

to a

dvic

e

Nov

-Dec

pea

k da

y <

175M

L an

d 3

day

avg.

<

170M

L; J

an-M

ar p

eak

day

< 19

0ML

and

3-da

y av

g. <

180

ML

'1' +

Pat

rols

(sug

gest

ligh

t - fr

iend

ly a

ppro

ach)

. Rem

inde

r of

byla

w h

ours

and

sav

ing

tips

Join

t adv

ertis

ing

of w

ater

ing

rest

rictio

ns b

y G

WR

C (t

o al

ert

publ

ic to

ons

et o

f tou

gher

sup

ply/

dem

and

situ

atio

n an

d re

min

d ab

out r

estri

ctio

n le

vel a

ctiv

e). G

WR

C S

WC

ad

verti

sing

con

tinue

s (if

act

ive)

.

Wee

kly

join

t wat

er re

stric

tions

adv

ertis

ing

until

pos

ition

im

prov

es O

R n

ext r

estri

ctio

n le

vel a

ctiv

ated

. GW

RC

SW

C s

ched

ule

base

d on

med

ium

wei

ght o

f exp

osur

e

Med

ia s

tate

men

t by

GW

RC

(to

aler

t pub

lic to

su

pply

/dem

and

situ

atio

n an

d ca

ll fo

r pat

rols

). U

pdat

es a

t ap

prox

. wee

kly

inte

rval

s un

til s

ituat

ion

impr

oves

Nov

-Dec

pea

k da

y <

170M

L an

d 3

day

avg.

<

165M

L; J

an-M

ar p

eak

day

< 18

5ML

and

3-da

y av

g. <

175

ML

Adve

rtisi

ng o

f ind

ivid

ual c

ounc

il pa

trolli

ng a

t dis

cret

ion

of c

ity

coun

cils

Freq

uenc

y of

adv

ertis

ing

abou

t Pat

rols

at d

iscr

etio

n of

ea

ch c

ity c

ounc

il.C

ity c

ounc

ils e

ach

to p

ublic

ise

wat

erin

g re

stric

tion

/ byl

aw

rule

s an

d on

set o

f pat

rols

via

'fre

e' c

ounc

il pu

blic

ity (e

.g.

med

ia s

tate

men

ts, c

ounc

il ne

ws

etc)

at r

egul

ar in

terv

als

Ban

on s

prin

kler

s an

d un

atte

nded

irrig

atio

n sy

stem

s (w

ater

ing

only

per

mitt

ed b

y ha

nd) +

Pat

rols

(inc

reas

ed

cove

rage

and

/or f

requ

ency

from

'Res

trict

ion

leve

l 2')

+ Le

aks/

Was

te h

otlin

e (if

not

alre

ady

avai

labl

e)

Join

t adv

ertis

ing

of b

an b

y G

WR

C (t

o al

ert p

ublic

to

supp

ly/d

eman

d si

tuat

ion

and

ban)

GW

RC

SW

C s

ched

ule

trans

ferre

d to

'ban

' mes

sage

. City

cou

ncils

to a

dver

tise

thei

r Le

aks/

Was

te h

otlin

es a

t lea

st v

ia 'i

n-ho

use'

cha

nnel

s

Adve

rtisi

ng o

f the

ban

sta

rting

wee

kly

in p

rint a

nd

med

ium

radi

o sc

hedu

le u

ntil

posi

tion

impr

oves

OR

nex

t re

stric

tion

leve

l act

ivat

ed. S

WC

adv

ertis

ing

can

be

resc

hedu

led

at s

hort

notic

e an

d so

me

activ

ity m

ay b

e if

shor

t ter

m s

uppl

y po

sitio

n im

prov

es b

ut l

Med

ia s

tate

men

t by

GW

RC

(to

aler

t pub

lic to

su

pply

/dem

and

situ

atio

n an

d ba

n). U

pdat

es a

t app

rox.

w

eekl

y in

terv

als.

City

cou

ncils

to in

vite

repo

rting

of l

eaks

an

d w

aste

and

rem

ind

of b

an a

nd p

atro

ls, v

ia 'f

ree'

co

unci

l pub

licity

(e.g

. med

ia s

tate

men

ts, c

ou

Targ

et p

eak

day

< 16

0ML

and

3-da

y ro

lling

m

ean

< 15

5ML

City

cou

ncils

to w

rite

to n

on-d

omes

tic h

igh

wat

er u

sers

, to

outli

ne s

ituat

ion,

requ

est t

hey

revi

ew n

on-e

ssen

tial w

ater

use

th

at c

ould

be

mod

ified

and

rem

ind

empl

oyee

s to

use

wat

er

with

car

e

4Ba

n on

all

dom

estic

hos

e us

e (a

llow

s ha

nd-w

ater

ing

with

ca

ns/b

ucke

ts) +

Pat

rols

(inc

reas

ed c

over

age

and/

or fr

equn

cy

from

'Res

trict

ion

leve

l 3')

+ Le

aks/

Was

te h

otlin

e

Join

t adv

ertis

ing

of b

an fr

eque

ncy

incr

ease

d (fr

om 'R

estri

ctio

n Le

vel 3

'). C

ity c

ounc

ils to

adv

ertis

e th

eir L

eaks

/Was

te

hotli

nes

mor

e ac

tivel

y th

an fo

r 'R

estri

ctio

n le

vel 3

'

Adve

rtisi

ng o

f the

ban

wee

kly

in p

rint (

Dom

-Pos

t and

4

com

mun

ities

) and

med

ium

radi

o sc

hedu

le u

ntil

posi

tion

impr

oves

OR

nex

t res

trict

ion

leve

l act

ivat

ed. A

dver

tisin

g ca

n be

resc

hedu

led

at s

hort

notic

e an

d so

me

activ

ity

may

be

if sh

ort t

erm

sup

ply

posi

tio

Med

ia s

tate

men

t by

GW

RC

(to

aler

t pub

lic to

su

pply

/dem

and

situ

atio

n an

d ba

n). U

pdat

es a

t app

rox.

tw

ice-

wee

kly

inte

rval

s un

til p

ositi

on im

prov

es. C

ity

coun

cils

requ

est r

epor

ting

of le

aks

and

was

te a

nd re

min

d of

ban

and

pat

rols

via

'fre

e' c

ounc

il pu

blic

ity

Targ

et p

eak

day

< 14

5ML

(win

ter a

vera

ge

dem

and)

Leve

l 2 ta

rget

ing

non-

dom

estic

wat

er u

sers

(to

be a

gree

d)C

ity c

ounc

il co

mm

unic

atio

n w

ith c

omm

erci

al u

sers

as

agre

ed

Ban

on a

ll do

mes

tic o

utdo

or w

ater

use

(oth

er th

an fo

r es

sent

ial h

ealth

-rela

ted

task

s) +

Pat

rols

(cov

erag

e an

d fre

quen

cy a

t lea

st a

s fo

r 'R

estri

ctio

n le

vel 4

')

Join

t adv

ertis

ing

of b

an in

crea

sed

(from

'Res

trict

ion

leve

l 4').

C

ity c

ounc

ils to

pub

licis

e th

eir L

eaks

/Was

te h

otlin

es m

ore

activ

ely

than

for '

Res

trict

ion

leve

l 4'

Adve

rtisi

ng o

f the

ban

wee

kly

in p

rint (

Dom

-Pos

t and

4

com

mun

ities

) and

at l

east

med

ium

radi

o sc

hedu

le u

ntil

posi

tion

impr

oves

. Adv

ertis

ing

can

be re

sche

dule

d at

sh

ort n

otic

e an

d so

me

activ

ity m

ay b

e if

shor

t ter

m

supp

ly p

ositi

on im

prov

es b

ut lo

nger

-term

Med

ia s

tate

men

t by

GW

RC

(to

aler

t pub

lic to

su

pply

/dem

and

situ

atio

n an

d ba

n). U

pdat

es a

s re

quire

d (tw

o-pl

us w

eekl

y) u

ntil

posi

tion

impr

oves

. City

cou

ncils

re

ques

t rep

ortin

g of

leak

s an

d w

aste

and

rem

ind

of b

an

and

patro

ls v

ia 'f

ree'

cou

ncil

publ

icity

(e.g

Targ

et p

eak

day

< w

inte

r av

erag

e de

man

d le

ss 1

0-15

% (1

22-1

29M

L)

Leve

l 3 ta

rget

ing

non-

dom

estic

wat

er u

sers

(to

be a

gree

d).

Citi

es to

inve

stig

ate

whe

ther

they

cou

ld a

nd w

ould

impo

se a

ho

sing

ban

on

non-

dom

estic

use

rs a

t 'R

estri

ctio

n le

vel 5

'

City

cou

ncil

com

mun

icat

ion

with

com

mer

cial

use

rs a

s ag

reed

532

#432641 13

Appendix 3

IFIM analysis of flow required to provide 75% and 50 % of MALF habitat

(from Environmental Management Associates)

#432

641

14

Tab

le sh

owin

gflo

w r

equi

red

to m

eet 7

5% a

nd 5

0% h

abita

t ret

entio

n fo

r va

riou

s spe

cies

Rea

chU

nits

Food

D.

May

flyB

T A

dult

BT

Year

ling

BT

Juve

nile

BT

Fry

<15c

m

BT

Fry

BT

Spaw

n

Birc

hvill

e

Hab

itat a

t 3.0

1 m

3/s

WU

A m

26.

98/m

9.32

4.34

5.80

6.92

3.25

7.58

1.55

90%

of h

abita

t at 3

.01

m3

WU

A m

/s2

6.28

/m8.

393.

905.

226.

232.

926.

821.

39Fl

ow 9

0% h

abita

t ret

entio

nm

32.

59/s

2.23

2.53

1.26

2.17

1.27

0.32

1.57

Flow

75%

hab

itat r

eten

tion

m3

2.04

/s1.

331.

920.

541.

30.

720.

061.

08Fl

ow 5

0% h

abita

t ret

entio

nm

31.

26/s

0.41

1.07

0.11

0.41

0.31

0.01

0.63

#432641 15

Appendix 4

Watering By-laws for:

Wellington City

Hutt City Council

Porirua City Council

Upper Hutt City

16

Wellington City Council

The following watering restrictions are in effect throughout the year, in the area served by Wellington City Council: Watering restrictions

Year-round restrictions on the use of sprinklers and garden hoses apply, to manage the demand for water

Unattended watering

Watering is permitted between 6am and 8am or 7pm and 9pm on alternate days. Properties with odd-numbered street addresses can be watered on odd days of the month - those with even-numbered street addresses on even days of the month

Watering by hand

A hand held hose may be used at any time, provided that water is not being used wastefully.

A watering can may be used to water at any time

Variations

Variations to Wellington City Council's watering restrictions may be introduced in times of drought, high demand and extreme circumstances. Variations will be notified through local media

Further informationFor further information about Wellington City Council's water charter, please contact Capacity, ph 910 3800.

17

Hutt City CouncilGarden watering restrictionsThe following watering restrictions are in effect in the area served by Hutt City Council during the period of daylight saving.

One sprinkler or unattended hose may be used per property. A buried irrigation system or soaker-hose is considered to be an unattended hose.

Unattended watering

Watering is permitted on alternate odd/even days. Properties with odd-numbered street addresses can be watered on odd days of the month - those with even-numbered street addresses on even days of the month.

Watering is permitted between 6.00am and 8.00am and 7.00pm and 9.00pm.

Watering by hand

A hand held hose may be used at any time, provided that no other hose or sprinkler is being used and that water is not being used wastefully.

A watering can may be used to water at any time.

ExceptionsThese restrictions do not apply to properties with metered service pipes or those properties that are not connected to Hutt City Council's water supply system and supply their own water for garden watering purposes.

The restrictions do not apply outside the daylight saving period.

For further information about Hutt City Council's watering bylaws, please contact Remi Cruze, Wellington Water Management Ltd., Tel. 910 3816.

Further information

18

Porirua City CouncilWatering bylawsThe following watering restrictions are in effect in the area served by Porirua City Council during the period of daylight saving:Unattended watering

One sprinkler or unattended hose may be used per property. A buried irrigation system or soaker-hose is considered to be an unattended hose.

Watering is permitted on alternate days. Properties with odd-numbered street addresses can be watered on odd days of the month - those with even-numbered street addresses on even days of the month.

Garden hosing restrictions do not apply to properties that have an authorised metered water supply, but water still must not be used wastefully.

Watering is permitted between 6.00am and 8.00am or 7.00pm and 9.00pm

Watering by hand

A handheld hose may be used at any time, provided that no other hose or sprinkler is being used and that water is not being used wastefully.

A watering can may be used to water at any time.

More informationFor further information about Porirua City Council's watering bylaws telephone 237 5089.

19

Upper Hutt City CouncilGarden watering restrictionsGarden watering restrictions apply all year round in the area served by Upper Hutt City Council's reticulated supply. The following restrictions apply:

A single garden watering system, or sprinkler, or soaker hose, or an unattended hose, may be in use at each premise in the morning between 6am and 8am, and in the evening between 7pm and 9pm.

Premises with even numbers can water on Wednesdays, Fridays and Sundays. Premises with odd numbers can water on Tuesdays, Thursdays and Saturdays. Watering with unattended devices is not allowed on Mondays.

Each garden watering system, sprinkler, soaker hose, or unattended hose must be in the care of a responsible person. Only one of the above garden watering systems can be used at a time in your garden.

It is an offence under the City's bylaws to use the water supply improperly or to an unreasonable extent or in a wasteful manner.

Upper Hutt City Council may introduce additional garden watering restrictions at any time, depending on available water supplies, and residents will be advised accordingly.

Using garden watering systems, sprinklers and hoses has the potential to waste a lot of water if used too frequently or turned on and forgotten about. It is for this reason that the above restrictions apply. They are designed to give people sensible guidance about the use of water - this will benefit all of us.More informationFor further information about Upper Hutt City Council's garden watering restrictions, telephone 527 2169.

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Appendix 5

Letter from Capacity