Groundwater study in Jaffna peninsula

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Herath Manthrithilake
January 17, 2014
Colombo, Sri Lanka
International Water Management Institute (IWMI)

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Groundwater study in Jaffna peninsula

  1. 1. Groundwater study in Jaffna Peninsula Photo: Sarath Gunasinghe/IWMI Herath Manthrithilake January 17, 2014 Colombo, Sri Lanka A water-secure world www.iwmi.org
  2. 2. (IWMI study, 2011) ‘Hot spots’ where agro-well density is very high  19,905 agro-wells identified (excluding Delft Island)  Over 200 wells/ sq.km (1 km2 = 100 ha) A water-secure world www.iwmi.org
  3. 3. Number of agro-wells on the rise in Valikamam South • Over irrigation 130 - 160% • Over abstraction of groundwater • Excessive pollution • Over use of ag. Chemicals 200% A water-secure world www.iwmi.org
  4. 4. Salt water intrusion A water-secure world www.iwmi.org
  5. 5. Concentration of nitrate during January 2011 Max Per D D + HG Public Paddy Banana Highland crops Farm A water-secure world www.iwmi.org
  6. 6. A water-secure world www.iwmi.org
  7. 7. ස ස ස ස . ස ස ස ස Thank you. . Fostering sustainable water use A water-secure world www.iwmi.org

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