River and stream water quality and ecology - Greater Wellington ...

River and stream water quality and ecology in the Wellington region: State and trends
Table 5.3: Summary of streambed periphyton cover (based on monthly assessments
undertaken between July 2008 and June 2011) 1 and biomass (chlorophyll a based on
annual assessments in 2009, 2010 and 2011) at 46 RSoE sites. An overall periphyton
‘class’ for each site is also presented based on compliance with the MfE (2000) periphyton
guidelines (see Table 5.2)
Periphyton streambed cover (%) Chlorophyll a (mg/m2 )
Site no. and name
Mat Filamentous
Mean Max % n>60 Mean Max %
n>30
n 2009 2010 2011 Mean
Quality
class
RS03 Waitohu S at Forest Pk 0.5 10 0 0.6 15 0 34 1.1 0.8 1.4 1.1 Excellent
RS05 Otaki R at Pukehinau 1.0 27 0 2.0 39 2.8 31 0.7 2.2 1.0 1.3 Excellent
RS06 Otaki R at Mouth 3.8 61 2.8 6.4 50 8.3 33 2.5 2.1 1.8 2.2 Good
RS09 Waikanae R at Mangaone Walk 0 0 0 0 0 0 36 0.2 0.9 0.3 0.5 Excellent
RS10 Waikanae R at Greenaway Rd 8.8 48 0 1.3 15 0 32 19.8 9.7 19.1 16.2 Excellent
RS11 Whareroa S at Waterfall Rd 0 0 0 0 0 0 32 29.7 0.6 1.1 10.4 Excellent
RS13 Horokiri S at Snodgrass 0.7 7 0 6.3 74 8.3 34 34.4 46.1 77.2 52.6 Good
RS14 Pauatahanui S at Elmwood Br 0 0 0 21.7 100 19.4 30 141.4 23.3 53.1 72.6 Fair
RS15 Porirua S at Glenside 1.3 20 0 23.6 91 25.0 30 43.3 76.7 30.3 50.1 Poor
RS16 Porirua S at Wall Park (Milk Depot) 2.7 29 0 24.7 84 30.6 30 38.5 55.3 20.0 37.9 Poor
RS17 Makara S at Kennels 0 0 0 1.6 28 0 29 5.7 15.4 0.1 7.1 Excellent
RS18 Karori S at Makara Peak 3.1 38 0 28.4 97 27.8 31 71.1 25.1 10.8 35.6 Poor
RS19 Kaiwharawhara S at Ngaio Gorge 4.0 43 0 29.9 100 36.1 33 61.5 34.2 37.8 44.5 Poor
RS20 Hutt R at Te Marua Intake Site 0 0 0 0 0 0 29 0.8 0.9 0.4 0.7 Excellent
RS21 Hutt R opp. Manor Park G.C. 15.8 88 5.6 3.5 20 0 29 18.1 59.8 1.6 26.5 Good
RS22 Hutt R at Boulcott 14.6 100 2.8 4.0 31 2.8 25 17.1 119.3 20.6 52.3 Good
RS23 Pakuratahi R 50m d/s Farm Ck 4.3 31 0 0.3 6 0 30 4.4 20.2 0.2 8.2 Excellent
RS24 Mangaroa R at Te Marua 11.3 54 0 8.5 79 5.6 30 59.8 72.6 83.9 72.1 Poor
RS25 Akatarawa R at Hutt R confl. 0.4 9 0 0 0 0 32 2.3 0.3 7.8 3.5 Excellent
RS26 Whakatikei R at Riverstone 2.8 30 0 2.5 46 2.8 32 13.6 5.0 6.8 8.4 Excellent
RS28 Wainuiomata R at Manuka Track 0 1 0 0 0 0 34 6.8 10.2 1.4 6.1 Excellent
RS29 Wainuiomata R u/s of White Br 7.5 43 0 2.8 19 0 28 40.2 236.3 78.6 118.4 Fair
RS30 Orongorongo R at Orongorongo Stn 1.3 11 0 15.5 100 19.4 22 19.9 3.3 3.0 8.8 Fair
RS31 Ruamahanga R at McLays 0.6 17 0 0.1 3 0 29 0.3 0.4 1.8 0.8 Excellent
RS32 Ruamahanga R at Te Ore Ore 0.7 12 0 1.7 20 0 19 27.7 34.8 90.5 51.0 Good
RS33 Ruamahanga R at Gladstone Br 3.5 60 0 5.0 42 2.8 22 47.0 65.0 58.3 56.8 Fair
RS34 Ruamahanga R at Pukio 0 0 0 13.0 100 5.6 16 22.0 91.5 49.0 54.1 Good
RS35 Mataikona Trib at Sugar Loaf Rd 0 0 0 0.2 5 0 34 7.3 11.7 4.0 7.7 Excellent
RS37 Taueru R at Gladstone 1.7 30 0 69.4 100 50.0 21 477.2 583.7 486.7 515.8 Poor
RS38 Kopuaranga R at Stewarts 6.8 26 0 44.4 100 34.3 20 690.0 515.2 350.5 518.6 Poor
RS40 Waipoua R at Colombo Rd Br 22.3 100 13.9 7.8 53 8.3 34 34.6 33.7 46.1 38.1 Fair
RS41 Waingawa R at South Rd 0.6 11 0 1.2 19 0 31 51.3 8.6 1.5 20.5 Good
RS43 Motuwaireka S at Headwaters 0 0 0 0 0 0 35 2.9 1.6 1.3 2.0 Excellent
RS44 Totara S at Stronvar 10.2 100 5.7 16.9 100 20.0 31 14.7 7.9 25.8 16.1 Fair
RS45 Parkvale Trib at Lowes Reserve 0 0 0 0 0 0 28 18.2 41.4 30.3 30.0 Excellent
RS46 Parkvale S at Weir 2.7 31 0 22.9 97 19.4 26 304.4 309.3 49.6 221.1 Poor
RS47 Waiohine R at Gorge 0.9 20 0 0.1 3 0 27 0.3 0.7 0.5 0.5 Excellent
RS48 Waiohine R at Bicknells 0.7 10 0 2.4 27 0 28 48.0 51.4 6.5 35.3 Good
RS49 Beef Ck at Headwaters 0.2 5 0 0 0 0 36 7.0 10.5 7.6 8.4 Excellent
RS50 Mangatarere S at SH 2 3.5 56 0 21.9 100 22.2 30 143.2 47.8 38.7 76.5 Poor
RS51 Huangarua R at Ponatahi Br 25.2 80 11.1 36.1 100 38.9 24 122.9 96.3 280.4 166.6 Poor
RS52 Tauanui R at Whakatomotomo Rd 0.3 9 0 1.3 21 0 28 0.8 30.6 1.7 11.1 Excellent
RS53 Awhea R at Tora Rd 1.7 36 0 55.3 100 38.9 21 35.8 29.3 60.8 42.0 Poor
RS54 Coles Ck Trib at Lagoon Hill Rd 0 0 0 16.3 80 17.2 27 41.6 21.5 59.6 40.9 Fair
RS55 Tauherenikau R at Websters 0 0 0 8.0 85 11.1 29 12.1 10.2 2.0 8.1 Fair
RS56 Waiorongomai R at Forest Pk 0 0 0 1.0 31 2.9 32 1.7 0.4 0.6 0.9 Excellent
1 Mean and maximum values, and % compliance with guideline values were calculated based on the total number of times a site was visited,
not the number of periphyton assessments able to be made at each site (this is because the majority of instances in which periphyton could not
be assessed coincided with high river or stream flows when periphyton cover was likely to be minimal/below guidelines).
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