Groundwater Quality.ppt ground water quality and tts effects on environment
- 2. Water Quality Water quality refers to the chemical, physical, and biological characteristics of water based on the standards of its usage.
- 3. Drinking water quality Drinking water is water that is used in drink or food preparation; potable water is water that is safe to be used as drinking water.
- 4. Water quality Three types i) Physical ii) Chemical iii) Bioligical
- 5. Groundwater quality Should meet all three standards as: physical, chemical and biological
- 6. GW pollution Groundwater pollution (also called groundwater contamination) occurs when pollutants are released to the ground and make their way into groundwater.
- 7. Pollutant types – Arsenic – Pathogen – Nitrate – Organic compound – Metal – Pharmaceutical – Other
- 8. Causes • Naturally-occurring (geogenic) • On-site sanitation systems • Sewage and sewage sludge • Fertilizers and pesticides • Commercial and industrial leaks • Hydraulic fracturing • Landfill leachate • Other
- 9. Effects Contamination of groundwater can result in poor drinking water quality, loss of water supply, degraded surface water systems, high cleanup costs, high costs for alternative water supplies, and/or potential health problems. The consequences of contaminated groundwater or degraded surface water are often serious.
- 10. Prevention –Precautionary principle –GW monitoring –Land zoning –Location of on-site sanitation systems. –Legislation
- 11. Management Options for remediation of contaminated groundwater can be grouped into the following categories: • containing the pollutants to prevent them from migrating further • removing the pollutants from the aquifer • remediating the aquifer by either immobilizing or detoxifying the contaminants while they are still in the aquifer (in-situ) • treating the groundwater at its point of use • abandoning the use of this aquifer's groundwater and finding an alternative source of water.