Groundwater study in Jaffna peninsula
7
www.iwmi.org A water-secure world www.iwmi.org A water-secure world Groundwater study in Jaffna Peninsula Herath Manthrithilake January 17, 2014 Colombo, Sri Lanka Photo: Sarath Gunasinghe/IWMI
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Herath Manthrithilake January 17, 2014 Colombo, Sri Lanka International Water Management Institute (IWMI)
Transcript of Groundwater study in Jaffna peninsula
www.iwmi.orgA water-secure world
www.iwmi.orgA water-secure world
Groundwater study in Jaffna Peninsula
Herath ManthrithilakeJanuary 17, 2014Colombo, Sri Lanka
Phot
o: S
arat
h G
unas
ingh
e/IW
MI
www.iwmi.orgA water-secure world
www.iwmi.orgA water-secure world
‘Hot spots’ where agro-well density is very high
19,905 agro-wells identified(excluding Delft Island)
(IW
MI
stu
dy,
201
1)
Over 200 wells/ sq.km(1 km2 = 100 ha)
www.iwmi.orgA water-secure world
www.iwmi.orgA water-secure world
Number of agro-wells on the rise in Valikamam South
• Over irrigation 130 - 160%
• Over use of ag. Chemicals 200%
• Over abstraction of groundwater• Excessive pollution
www.iwmi.orgA water-secure world
www.iwmi.orgA water-secure world
Salt water intrusion
www.iwmi.orgA water-secure world
www.iwmi.orgA water-secure world
D
Farm
PublicD + HG Paddy Banana Highland crops
Max Per
Concentration of nitrate during January 2011
www.iwmi.orgA water-secure world
www.iwmi.orgA water-secure world
www.iwmi.orgA water-secure world
www.iwmi.orgA water-secure world
ස්තූතියි.
Thank you.
நன்றி�.
Fostering sustainable water use
