Land capability assessment for on-site sewage treatment systems

作者: Les A. Dawes , Ashantha Goonetilleke , Wael Al-Shiekh Khalil , Steven P. Carroll

DOI:

关键词: Sewage treatmentEnvironmental engineeringEnvironmental resource managementLand developmentEffluentSewageSampling (statistics)Septic tankSoil classificationGroundwaterEngineering

摘要: Background The research project was formulated to solve possible environmental and public health impacts which can result from the failure of subsurface dispersal systems used for application effluent on-site sewage treatment systems. On-site adopt a train approach with associated soil area playing crucial role. The most common system that is conventional septic tank system. given high priority as it ‘last line defence’ before enters groundwater or surface water source. This underlies vital importance employing reliable science-based site suitability assessment techniques dispersal. The Project The study conducted within Logan City Council area. About 50% region unsewered type work undertaken consisted extensive field investigations, sampling testing, laboratory experiments data analysis. The overall three stages evaluation, namely (1) theoretical evaluation; (2) multivariate chemometrics analysis; (3) column under conditions. evaluation based on physico-chemical derived testing regime during study. allowed preliminary renovation ability different groups found However shortcoming this only limited number parameters could be taken into consideration. Unfortunately, due large amount generated manipulating analysing entire dataset in order derive meaningful outcomes difficult. Through several other important parameters, although investigated, but did not play major role initial evaluation. twin challenges volumes collected, need develop methodology overcome by using multicriteria decision making methods PROMETHEE GAIA. use analysis all key characteristics identify interactions correlations between multiple are difficult achieve simple statistical analysis. helped better understanding behaviour basis its characteristics, further enhance collected information. Subsequently, conclusions were validated experimental columns. provided valuable information regarding performance helping link evaluations integration knowledge through various made ‘Soil map’ treatment. map then integrated flood risk ‘Risk treatment’ region, thus providing land capability A outcome experiment enabled determination long term acceptance rate (LTAR) types region. achievement primary aims project. It expected will contribute achieving following objectives: • Provide rational strengthening management strategies governing area. • The continuous improvement and/or development relevant design criteria currently available ‘state art’ outcomes. • Ensuring treat one factors consideration relating development. The findings recommendations listed separately

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