Eurobodalla Integrated Water Cycle Management Strategy

More documents

Recommendations

Info

112 Eurobodalla Integrated Water Cycle Management Strategy Another alternative is to upgrade the septic system to one that achieves nutrient removal and therefore results in a higher quality effluent discharge (e.g. aerated tanks). This would increase the potential uses available for the resulting treated effluent. Both these options would minimise the potential of groundwater contamination and its associated environmental impacts, as well as reducing the likelihood of public health issues and odour complaints. Enhanced Management of Existing On-site Facilities with Greywater Reuse In this opportunity blackwater (water from kitchen sink and toilet), and greywater (water from laundry and bathroom), would be managed separately. The blackwater would be treated in the existing septic tanks with regular pumpouts and the greywater would be treated on-site using an advanced technology such as aerated tanks. The treated effluent could then be recycled for garden watering and toilet flushing. In addition to reducing the amount of imported reticulated water, this would conserve harvested roof rainwater. With the implementation of an appropriate monitoring system, long term environmental and water resource sustainability and public health protection could be achieved. Centralised Management of Effluent from On-site Facilities As an alternative to providing a full reticulated sewage system, the effluent from existing onsite systems (e.g. septic tanks) could be collected and transported to a central treatment facility. This type of system relies on smaller pipes than those required for a conventional reticulated sewerage system. Pipes can be laid in the ground at a lesser gradient and at a more shallow depth than that of conventional gravity sewerage, as the pipes carry only liquid effluent. The solids are captured by the on-site system. The effluent could be treated locally or transported to Batemans Bay STP. Appendix P provides information on the various effluent transport and local treatment options. Treating effluent at a local facility would result in a number of options for the management of reclaimed water. Preliminary appraisal suggests dunal infiltration, agricultural reuse (possibly at the Princess Highway) and controlled groundwater injection for subsequent extraction as the most suitable options worthy of further evaluation. Costs in Table 9-1 are based on centralised effluent drainage (CED) for transport, a local package plant for treatment and dunal infiltration. Provision of Full Reticulated Sewerage System An alternative to on-site treatment facilities is to transfer wastewater (i.e. black and greywater) through a centralised sewer transport network to either a local treatment facility as discussed for the previous opportunity or to the Batemans Bay treatment works. Unlike the previous opportunity, the sewer transport pipes would need to be larger and possibly installed at greater depths. Appendix P provides a detailed description of the available transport and local treatment options. The shortlisted reclaimed water management options are the same as those discussed for the above opportunity. Costs in Table 9-1 are based on a modified gravity transport system, a local package extended aeration treatment plant and dunal infiltration.
Eurobodalla Integrated Water Cycle Management Strategy Social and Environmental Aspects of Medium to Long Term Water Cycle Management Opportunities The TBL assessment (Table 9-2) provides the comparative environmental and social benefits of each water cycle management opportunity. Table 9-2 Social and Environmental Aspects of the Medium to Long Term Opportunities for South Durras Opportunity Social Environmental Improved management of existing water supply Harvested roof water supplemented with reticulated water Provision of full reticulated water system Local water source Regional water source Local water source Regional water source Improved management of existing onsite facilities Reduces demands for water and increases security Increases public awareness of water conservation issues Decreases public health risks and increases security Eliminates the need to import water Water for potable uses would meet the Australian Drinking Water Guidelines Decreases public health risk and increases security Eliminates the need to import water Water for potable uses would meet the Australian Drinking Water Guidelines Decreases public health risk and increases security Eliminates the need to import water Provision available for fire fighting purposes Short term inconvenience for residents during construction, i.e. noise, vehicle movement Water for potable uses would meet the Australian Drinking Water Guidelines Decreases public health risk and increases security Eliminates the need to import water Provision available for fire fighting purposes Short term inconvenience for residents during construction, i.e. noise, vehicle movement Water for potable uses would meet the Australian Drinking Water Guidelines Associated odour and noise impacts Inconvenience of pumpout trucks in the area More conservative/efficient use of water. Incorporates sustainable use of water resources Water extraction could place pressure on the local aquifer and the environment Incorporates sustainable use of water resources Reduces pressure on the local aquifer Less pressure on local environments, however increases pressure on regional water sources Water extraction could place pressure on the local aquifer and the environment Increases runoff, which may result in increased pollutant loads entering the environment Possible environmental impact during construction Less pressure on local environments, however increases pressure on regional water sources Increases runoff, which may result in increased pollutant loads entering the environment Possible environmental impact during construction Improves environmental outcomes, minimises the incidence of septic effluent contaminating groundwater 113
Page 1:
Eurobodalla Integrated Water Cycle
Page 4 and 5:
ii Eurobodalla Integrated Water Cyc
Page 6 and 7:
iv Eurobodalla Integrated Water Cyc
Page 8 and 9:
vi Eurobodalla Integrated Water Cyc
Page 10 and 11:
viii Eurobodalla Integrated Water C
Page 12 and 13:
x Eurobodalla Integrated Water Cycl
Page 14 and 15:
xii Eurobodalla Integrated Water Cy
Page 16 and 17:
xiv Eurobodalla Integrated Water Cy
Page 18 and 19:
xvi Eurobodalla Integrated Water Cy
Page 20 and 21:
xviii TABLES Eurobodalla Integrated
Page 22 and 23:
xx Eurobodalla Integrated Water Cyc
Page 24 and 25:
xxii Eurobodalla Integrated Water C
Page 26 and 27:
xxiv Eurobodalla Integrated Water C
Page 28 and 29:
2 Eurobodalla Integrated Water Cycl
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
10 Eurobodalla Integrated Water Cyc
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
FACT SHEET 3 Rainwater Tanks 18 Eur
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
FACT SHEET 9 Loss Reduction 24 Euro
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
38 Number of Persons 2,500 2,000 1,
Page 66 and 67:
Page 68 and 69:
42 % Occupancy 80% 70% 60% 50% 40%
Page 70 and 71:
Page 72 and 73:
46 Annual Volume (ML/Yr) 2,500 2,00
Page 74 and 75:
48 Demand ML/a Eurobodalla Integrat
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
6.5.3 Stormwater Issues 58 Euroboda
Page 86 and 87:
Page 88 and 89: 62 Eurobodalla Integrated Water Cyc
Page 102 and 103: 76 This page is intentionally blank
Page 110 and 111: 8.3.2 Immediate Measures 84 Eurobod
Page 126 and 127: 100 Eurobodalla Integrated Water Cy
Page 132 and 133: 9.2 South Durras 9.2.1 Background 1
Page 150 and 151: 124 Provision of full reticulated s
Page 158 and 159: 132 Stormwater Eurobodalla Integrat
Page 166 and 167: 9.5 Mogo 9.5.1 Background 140 Eurob
Page 170 and 171: 144 Social Issues Eurobodalla Integ
Page 188 and 189:
162 Eurobodalla Integrated Water Cy
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
9.11 Potato Point 9.11.1 Background
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
9.14.2 What are the Issues? 202 Eur
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
9.15.2 What Are the Issues? 208 Eur
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
214 ML/a 8000 7000 6000 5000 4000 3
Page 242 and 243:
216 ML/a Eurobodalla Integrated Wat
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 254 and 255:
228 SCENARIO 1 Regional Water Suppl
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
Page 266 and 267:
Page 268 and 269:
Page 270:
show all

Eurobodalla Integrated Water Cycle Management Strategy

Create successful ePaper yourself

Delete template?

Save as template?