- Title
- Using the DRASTIC model for determination of groundwater vulnerability in shallow aquifer in broke, NSW, Australia
- Creator
- Askarimarnani, Sedigheh "Sara"; Willgoose, Garry
- Relation
- 35th Hydrology & Water Resources Symposium 2014 . Proceedings of the 35th Hydrology & Water Resources Symposium 2014 ( ) p. 174-181
- Relation
- http://www.proceedings.com/25411.html
- Publisher
- Engineers Australia
- Resource Type
- conference paper
- Date
- 2014
- Description
- Increasing rates of surface pollution have negative influences on groundwater resources and this has caused concerns among hydrogeologists. Focusing on this issue, this paper presents an alluvial groundwater vulnerability map based on the DRASTIC model at potential coal seam gas sites in the Broke area, which is located in the Hunter Valley, in the northern part of the Sydney basin, in NSW, Australia. This method was developed by the United States Environmental Protection Agency (USEPA) for assessing and analysing groundwater vulnerability. The method has been named for the seven parameters that are considered in the method (depth to water table, recharge, aquifer media, soil media, topography, impact of vadose zone and hydraulic conductivity) to indicate the areas with the highest potential for groundwater pollution. A geographical information system (GIS) has been used to create and analyse the groundwater vulnerability maps. First the seven raster maps have been generated separately based on geology, hydrology and hydrogeologic data. After that, each parameter is rated on a scale from one to 10. A rating of 10 indicates a high pollution potential of the parameter for the study area. Then a weight is assigned to each parameter to express its relative importance. Finally all of the seven raster layers have been overlaid to show the area with the highest vulnerability.
- Subject
- groundwater resources; surface pollution; coal seam gas
- Identifier
- http://hdl.handle.net/1959.13/1068239
- Identifier
- uon:18584
- Identifier
- ISBN:9781922107190
- Language
- eng
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