Summary - City of Gosnells

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Wetlands Field Survey 89Some wetlands in the MKSEA were more modified than the CCW above with regard to wetland vegetationand other wetland attributes and processes. These wetlands were palusplains, sumplands, damplands andcreeks of the Pinjarra Plain and thus scarce wetland types. Some of these wetlands retain open to scatterednative vegetation canopy species and/or were important to the maintenance of wetland values and processes(e.g. biodiversity, groundwater quality and quantity) of adjoining CCW and of the Swan Canning Riversystem. The modification that these wetlands have been subject was considered as capable of beingremediated by re-vegetation and by the application of best practice water sensitive design and catchmentmanagement principles in the overall plan for the area.In accord with the above, part of UFI 7645, UFI 7783 and part of UFI 8047 (that are currently MUWs inDEC, 2008a) were assigned the management category of REW in the current survey (Table 6.3; Figure 11).Parts of UFI 13362 adjacent to Yule Brook (that are currently MUW) were also recommended for REWstatus in this study, as part of the proposed amelioration of the hydrological regime in BFS 387 and theMKSEA, the restoration of the former Yule Brook floodplain and to enable catchment managementobjectives with regard to the Swan-Canning River Water Quality Improvement Plan as listed by GHD(2008).One of the areas in UFI 13362 where existing wetland values can be enhanced to meet the objectives aboveis the least altered area of UFI 13362 with regard to soil, landforms and hydrology. Floodplains of this type(that have not had not been built upon and have their geomorphic integrity and hydrology remaining more orless unaltered are scarce wetland types of the Pinjarra Plain (more than 94% of wetlands of the Pinjarra Plainhave been developed or degraded, Hill et al.,1994). The paddocks of this large area are currently sparselystocked and there are few buildings. There is a small creek that traverses UFI 13362 before entering thethickly vegetated, natural area of UFI 7635 (which is recommended as a CCW in the current survey) andflowing into Yule Brook. This creek retains its natural course for much of its length as it traverses thepaddocks and the area around its confluence with Yule Brook (at UFI 7635). This area is the least disturbedarea of floodplain vegetation adjacent to Yule Brook. The Yule Brook floodplain and creek in Lot 2008 canbe enhanced by the regulation of land uses to avoid further modification, control of weeds, revegetation toincrease infiltration of rainfall and surface water into groundwater and appropriate re-design of the MUW atthe head of the tributary (UFI 7632) to improve water quality. The tributary can then function to recharge thefloodplain as well as to provide drainage to developed land to the east.In general, the remainder of the wetlands in the MKSEA had either been excavated to form dams and drains,or had been severely eroded by the intensive grazing of stock or they had been totally or partially filled. Theywere usually totally cleared of native vegetation. These wetlands were assigned the management category ofMUW. Such wetlands are the only category of wetland that can be modified for use in storm water run-offtreatment and, if appropriately designed and engineered, such facilities could contribute to supporting thewetland attributes and functions of nearby CCW and REW wetlands in the MKSEA (as above for REW13362). These wetlands are often located in areas adjacent to CCW and REW and should be reserved asbuffer zones for them (Figures 11, 12). Land uses in wetlands in this category (particularly around BFS 387and the CCWs and REWs of Precinct 2) should be regulated to exclude any additional activities that mayimpact negatively on water quality and quantity of the adjacent CCW and REW and of the Swan CanningRiver system. Revegetation should be a major objective for the MUW of the MKSEA.The management categories that were assigned to wetlands in the current survey are listed in full (incomparison with the corresponding categories in the Swan Coastal Plain Wetlands Dataset) in Table 6.3below.Tauss, C. and Weston, A.S. (2010). The flora, vegetation and wetlands of the Maddington-Kenwick Strategic Employment Area.A survey of the rural lands in the vicinity of the Greater Brixton Street Wetlands. Report to the City of Gosnells, W.A. Version 18.04.10
Wetlands Field Survey 90Table 6.3: Review of Wetland Classification and Management Category for wetlands of MKSEA against the existing DEC Wetland DatabaseThe MKSEA Precincts below are as per Figure 3 (City of Gosnells Concept Plan, July 2008). MKSEA Study Site and BFS wetlands are indicated in Column 1.MKSEAPrecinctWetlandUFIDEC 2008bDEC 2008aProposed in thisSurveyComments3A 7632DamplandMUWDamplandMUWandPalusplain REWVegetation degraded and wetland highly modified but retains important wetland function as part of surface watercatchment and headwaters of tributary that delivers into Yule Brook floodplain UFI 13362.Wetland requires restoration and replanting to function in collecting stormwater, stripping nutrients andretaining gross debris. Should be part of a comprehensive plan to restore Yule Brook as a living stream.3A 7633SumplandMUWSumplandMUWVegetation degraded and wetland area highly modified but retains important wetland function as part of surfacewater catchment and headwaters of tributary that delivers into Yule Brook. Requires wetland restoration,replanting and management as part of a planned process to restore Yule Brook as a living stream.3B 7634PalusplainREWPalusplainREWThis is a mature stand of Corymbia calophylla trees that requires linking to the riparian vegetation of YuleBrook by the revegetation of the intervening paddock.3A/3BMKSEA StudySite 4MKSEA StudySite 5763513362adj. toYule BrkPalusplainREWPalusplainMUWPalus- and flood-plainsCCWPalusplain andfloodplainREWCurrent flora survey showed very high conservation values in part of this wetland, so it should be recommendedfor change to CCW. The rest of the riparian zone of Yule Brook and all areas between Yule Brook and BFS 387should be managed as REW, i.e. enhanced by replanting and linked to UFI 7636 and BFS 387.Regulate land uses to avoid further modification and negative impact on Yule Brook and adjacent CCW in BFS387. Revegetate, restore flooding of former floodplain zone and provide fauna habitat.3B 7636PalusplainREWPalusplainREWLink to UFI 7635 by REW adjacent to Yule BrookRegulate land uses to avoid further modification, revegetate to promote groundwater recharge and provide faunahabitat.3B77747776PalusplainCCWPalusplainMUWPalusplainCCWPalusplainMUWCurrent flora survey showed very high conservation values. All of lot should be either CCW, REW for riparianzone of Yule Brook or MUW (managed as a buffer for CCW and REW).3B 7779PalusplainMUWPalusplainMUWManage as a buffer for adjoining CCW and REW.Regulate land uses to avoid further modification and negative impact on adjacent CCW in BFS 387, revegetateto promote groundwater recharge and provide fauna habitat.3BMKSEA StudySites 20 & 217780PalusplainCCWPalusplainCCWCurrent flora survey showed very high conservation values. All of lot should be either CCW, REW for riparianzone of Yule Brook or MUW (managed as a buffer for CCW and REW).3BMKSEA StudySite 32778713362PalusplainPalusplainMUWCCWPalusplain/Sumplands/creek MUWRegulate land uses to avoid further modification and negative impact on adjacent CCW in BFS 387, revegetateto promote groundwater recharge and provide fauna habitat. Control aquatic weeds in dams.Remediate current drainage channel to Yule Brook: control weeds and nutrient enrichment.Tauss, C. and Weston, A.S. (2010). The flora, vegetation and wetlands of the Maddington-Kenwick Strategic Employment Area.A survey of the rural lands in the vicinity of the Greater Brixton Street Wetlands. Report to the City of Gosnells, W.A. Version 18.04.10
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18 April 2010The flora, vegetation
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SummaryiiSummaryThe City of Gosnell
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SummaryvMost of Precinct 2 (includi
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Table of ContentsTable of ContentsS
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Table of Contents6.4 Buffer zones f
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Introduction 2Two modified Concept
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Introduction 4• Comment on the co
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Regional Setting 6The Ridge Hill Sh
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Regional Setting 82.4 Hydrology and
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Regional Setting 10appropriate leng
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Regional Setting 12(Figures 6, 7),
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Regional Setting 14Pinjarra Plain V
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Regional Setting 16(Keighery, 1997)
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Regional Setting 18BFS 387 (Marshal
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Methods 203.2 Flora Sampling, Veget
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Methods 22and wetland evaluation. T
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Methods 242008c). Due to the time c
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Methods 26Wetland Scientific value:
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Methods 28Part IV: Supplementary Qu
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Methods 30C Semeniuk Research Group
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Methods 32Table 3.13: MKSEA Survey
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Flora 344.1.1 Flora of Conservation
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Flora 36include such things as the
Page 49 and 50: Flora 382. Significant PopulationsA
Page 51 and 52: Flora 40The total number of native
Page 53 and 54: Flora 42Eremophila glabra subsp. ch
Page 55 and 56: Flora 441. Taxa of scarce or refugi
Page 57 and 58: Flora 46was recorded in a small cla
Page 59 and 60: Flora 485. Melaleuca osullivanii. T
Page 61 and 62: Vegetation 505. Vegetation5.1 Veget
Page 63 and 64: Vegetation 522. Shrublands and Wood
Page 65 and 66: Vegetation 54FCT 8: Herb Rich Shrub
Page 67 and 68: Vegetation 56In several blocks in P
Page 69 and 70: Vegetation 58latilobus, Sphaerolobi
Page 71 and 72: Vegetation 60racemosa, *Hypochaeris
Page 73 and 74: Vegetation 62Vegetation Unit ST5: H
Page 75 and 76: Vegetation 64Associates of this veg
Page 77 and 78: Vegetation 66Map Unit& Total HaVege
Page 79 and 80: Vegetation 68of Western Australian,
Page 81 and 82: Vegetation 70Group A. FCT 3aResults
Page 83 and 84: Vegetation 721.SitesQ=quadratR=rele
Page 85 and 86: Vegetation 74it was recorded previo
Page 87 and 88: Vegetation 76Veg Unit andLocation i
Page 89 and 90: Wetlands Field Survey 78The stratig
Page 91 and 92: Wetlands Field Survey 80MKSEA Preci
Page 93 and 94: Wetlands Field Survey 826.2 Geomorp
Page 95 and 96: Wetlands Field Survey 84Table 6.2:
Page 97 and 98: Wetlands Field Survey 86Site No.1.
Page 99: Wetlands Field Survey 886.3 Evaluat
Page 103 and 104: Wetlands Field Survey 92MKSEAPrecin
Page 109 and 110: Wetlands Field Survey 98existing la
Page 111 and 112: Wetlands Field Survey 100The region
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Summary - City of Gosnells

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