smiths lake planning study volume 1: text - Great Lakes Council

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SOILS AND GEOTECHNICAL 26 60 Plasticity Index (%) 50 40 30 20 10 0 A-line 0 20 40 60 80 100 120 Liquid Limit (%) Figure 2-4 Plasticity Chart for Classifying Fine-Grained Soils by Unified Soil Classification System SMITHS_LAKE_PLANNING_STUDY.DOC O C E A N I C S A U S T R A L I A
FLOODING AND DRAINAGE 27 3 FLOODING AND DRAINAGE 3.1 Site Characteristics and Available Data 3.1.1 Topography and Watercourses The catchments of the major watercourses within the study areas are delineated in Figure 3-1. The majority of the SLA and SLVA drains to Smiths Lake, with the remainder draining to Wallis Lake. The areas of these major catchments are listed below: • Wamwarra Creek = 7.2 km 2 • Tarbuck Creek = 2.1 km 2 • Duck Creek = 5.1 km 2 • Wallis Creek = 8.5 km 2 The dominant features of the topography of the study area are: • On the eastern boundary of the SLA, a steep-sided ridge line runs north to south separating the Wallis Creek catchment from the sea. This ridge is dominated by Yaric peak at 216 mAHD and slopes of up to 50%; • South-west of the Lakes Way, the Wallis Creek catchment is rather low-lying and swampy. A number of artificial lakes have been created possibly from sand mining activities; • In the centre of the SLA a ridge line running north-west to south-east separate the Wamwarra Creek and Tarbuck Creek catchments from the Wallis Creek and Duck Creek catchments. • In the western portion of the SLA a ridge lines running north-west to south-east separates Jacks Creek (a tributary of Wamwarra Creek) from the lower catchment of Wamwarra Creek. • The SLVA topography is comprised of a number of short ridges running from the north to the south at Smiths Lake. A number of minor creeks and gullies run between these ridges. Smiths Lake was formed as a barrier lagoon with a coastal sand dune barrier on the eastern shore (south-east of the SLVA). Dunes occur in the eastern part but are more extensive to the east and south of the study areas. Wind movements mainly affect the beach zone but note for example comments in Section 10.5.2 on Symes Bay. 3.1.2 Rainfall and Flood Data Webb (1998) quotes a Bureau of Meteorology record for Station 60013 (Forster Post Office) giving an average annual rainfall of 1215 mm and annual median rainfall of 1206 mm for the period 1896 to 1997. SMITHS_LAKE_PLANNING_STUDY.DOC O C E A N I C S A U S T R A L I A
Page 1 and 2: SMITHS LAKE PLANNING STUDY VOLUME 1
Page 3 and 4: CONTENTS I CONTENTS 1 INTRODUCTION
Page 5 and 6: CONTENTS III 11.1 Sewer 128 11.2 Ot
Page 7 and 8: LIST OF FIGURES V Figure 8-1 Visual
Page 9 and 10: INTRODUCTION 1 1 INTRODUCTION 1.1 G
Page 11 and 12: INTRODUCTION 3 • visual quality;
Page 13 and 14: SOILS AND GEOTECHNICAL 5 2.2.2 Fiel
Page 15 and 16: SOILS AND GEOTECHNICAL 7 2.3.3 Geol
Page 17 and 18: SOILS AND GEOTECHNICAL 9 Table 2-3
Page 19 and 20: SOILS AND GEOTECHNICAL 11 rather th
Page 21 and 22: SOILS AND GEOTECHNICAL 13 soils wit
Page 23 and 24: SOILS AND GEOTECHNICAL 15 The resul
Page 25 and 26: SOILS AND GEOTECHNICAL 17 • RCA11
Page 27 and 28: SOILS AND GEOTECHNICAL 19 to steepe
Page 29 and 30: SOILS AND GEOTECHNICAL 21 Based on
Page 31 and 32: SOILS AND GEOTECHNICAL 23 • Mediu
Page 33: SOILS AND GEOTECHNICAL 25 There are
Page 37 and 38: FLOODING AND DRAINAGE 29 3.2 Floodi
Page 39 and 40: FLOODING AND DRAINAGE 31 3.2.3 Floo
Page 41 and 42: FLOODING AND DRAINAGE 33 the perime
Page 43 and 44: STORMWATER MANAGEMENT 35 This study
Page 45 and 46: STORMWATER MANAGEMENT 37 Figure 4-4
Page 47 and 48: STORMWATER MANAGEMENT 39 4.4.7 Sedi
Page 49 and 50: STORMWATER MANAGEMENT 41 4.5.4 Swal
Page 51 and 52: STORMWATER MANAGEMENT 43 Table 4-1
Page 53 and 54: FLORA 45 characteristics. Some vege
Page 55 and 56: FLORA 47 mahogany (Eucalyptus robus
Page 57 and 58: FLORA 49 Distribution: This forest
Page 59 and 60: FLORA 51 Distribution: This forest
Page 61 and 62: FLORA 53 5.2.23 Scrub (224) Structu
Page 63 and 64: FLORA 55 Species Significance & Dis
Page 65 and 66: FLORA 57 Species Significance & Dis
Page 67 and 68: FLORA 59 5.4.7 Swamp Oak (32) Distr
Page 69 and 70: FLORA 61 5.4.17 Spotted Gum (70) Di
Page 71 and 72: FLORA 63 Forest Type Description Co
Page 73 and 74: FAUNA 65 6.1.4 Swamp Oak (32) Habit
Page 75 and 76: FAUNA 67 heathland shrub layer woul
Page 77 and 78: FAUNA 69 of the tree adjacent to th
Page 79 and 80: FAUNA 71 Common Name Scientific Nam
Page 81 and 82: FAUNA 73 Common Name Scientific Nam
Page 83 and 84: FAUNA 75 6.4.1.1 Community Habitat
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FAUNA 77 6.4.2 Problems with the Me
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FAUNA 79 6.6.3 Development of Mediu
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WATER QUALITY SENSITIVITY MAPPING 8
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VISUAL AND SCENIC QUALITY 87 Rural
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VISUAL AND SCENIC QUALITY 89 • mi
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VISUAL AND SCENIC QUALITY 91 8.3.1
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VISUAL AND SCENIC QUALITY 93 Sensit
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LAND CAPABILITY ASSESSMENT 95 9 LAN
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LAND CAPABILITY ASSESSMENT 97 Time
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LAND CAPABILITY ASSESSMENT 99 Envir
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LAND CAPABILITY ASSESSMENT 101 Envi
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ABORIGINAL AND EUROPEAN HERITAGE 10
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INFRASTRUCTURE 129 11.2 Other Servi
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BUSHFIRE MANAGEMENT INVESTIGATION 1
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LAND SUITABILITY ASSESSMENT 139 13
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LAND SUITABILITY ASSESSMENT 141 lin
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LAND SUITABILITY ASSESSMENT 143 13.
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LAND SUITABILITY ASSESSMENT 145 The
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LAND SUITABILITY ASSESSMENT 147 13.
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LAND SUITABILITY ASSESSMENT 149 The
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REFERENCES 151 Floyd, A.G. (1990)
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