Drinking water Safety Cover Kandana Normal water Treatment Flower
Draft Water Safety Plan
Kandana Water Treatment Grow
Step 1 :
Catchment and consumption
Surface area water: Kalu Ganga
Ability (Max. ): 60, 000 m3/day
вЂў Kalu Ganga is the second largest riv basin (2719 km2), beginning with central hills (2250m) and running throughout the wet zone.
вЂў Primary sources of drinking water of the river are mountainous forests in the central region and the Sinharaja Forest Reserve.
вЂў Most significant amount of water (4000 m3) is discharged towards the sea by Kalutara following travelling around Sabaragamuva (Ratnapura) and American (Horana, Mathugama, Kalutara) pays (129km).
вЂў Upper portion of the basin has steep incline and reduce part features mild slope.
вЂў Top part of the catchment is highly affected by intensive farming of long lasting export crops (Tea, Rubber, etc . ) and downtown centres.
вЂў Middle portion is going through very well populated urban areas and export crop grown areas.
вЂў Lower part is mainly troubled by paddy cultivation and also it truly is affected by overflow due to hydrological and topographical characteristics in the basin during southwest monsoon season.
um Extensive cleaning of organic vegetation
o Using agrochemical and various chemical manures
o Dropping urban solid waste
o Encroachment of Reservations
to Gem Puits & Cleansing
o Fine sand Mining
Total capability of Kandana Treatment Herb is 60, 000 m3/day.
вЂў 500, 000 populations are maintained and supply areas are Horana, Bandaragama, Panadura, and Moratuwa.
вЂў Drinking water abstraction stage is Kandana.
вЂў Typical treatment method is highly processed.
Typical Hazards and Hazardous Situations Identification
|Hazardous Incidents |Hazards | |Meteorology and weather habits |Flooding | | |rapid changes in source water top quality | |Seasonal variation |Changes in supply water quality | |Mining |Deterioration of water top quality | |Sand Mining |River bank chafing | |Gem Mining & washing |Lowering the river bed level | | |Blocking the flow pathways of the draining | |Agriculture |Microbial toxins, Pesticides, Weedicides, Nitrate, Phosphate | | |Slurry and dung growing | | |Disposal of dead animals | |Forestry |Pesticides, PAHs-poly aromatic hydrocarbons(fires) | |Industry (including small scale and |Chemical and microbes contamination | |sites) |Potential loss of source water as a result of contamination | |Transport-Roads and Railways |Pesticides, Chemicals...