Groundwater study in Jaffna peninsula

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International Water Management Institute (IWMI)

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

Negócios Tecnologia

Groundwater study in Jaffna Peninsula

Photo: Sarath
Gunasinghe/IWMI

Herath Manthrithilake
January 17, 2014
Colombo, Sri Lanka

A water-secure world
www.iwmi.org

(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

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

Salt water intrusion

A water-secure world
www.iwmi.org

Concentration of nitrate during January
2011

Max Per

D

D + HG

Public

Paddy Banana

Highland crops

Farm

A water-secure world
www.iwmi.org

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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Groundwater study in Jaffna peninsula

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. (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. 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. Salt water intrusion A water-secure world www.iwmi.org

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. A water-secure world www.iwmi.org

7. ස ස ස ස . ස ස ස ස Thank you. . Fostering sustainable water use A water-secure world www.iwmi.org

Groundwater study in Jaffna peninsula

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Groundwater study in Jaffna peninsula