View
227
Download
0
Embed Size (px)
Citation preview
Paul Pavelic International Water
Management
Institute, Lao PDR
Buffering water variability at the
river basin scale through UTFI
3rd Asia-Pacific Water Summit
Technical Session on:
‘Reviving Hydrological Cycles:
Rainwater Harvesting and Sustainable
Groundwater Management’
11th December 2017, Yangon, Myanmar
Photos: IWMI
Too little Too muchToo low
UTFI APPROACH
OBJECTIVES
• Develop a sound and holistic
evidence-based case for
Underground Taming of Floods for
Irrigation (UTFI)
• Facilitate opportunities for scaling up
in prospective parts of the Ganges
METHODS
• Research – mapping, hydrologic/
hydraulic modelling, pilot testing
(technical, social/gender, economic,
institutional, environmental analysis)
• Outreach – workshops, open days,
dialogue, trainings etc.
Water stored below-ground provides buffering against drought and is utilized to increase dry season agricultural production and safeguard domestic
supplies.
SCHEMATIC
UTFI SCHEMATIC1. CURRENT
2. UTFI WET SEASON
3. UTFI DRY SEASON
Season floods inundate urban areas and farmlands; groundwater use creates leads to drying out of shallow wells and higher pumping costs.
Floodwater is intercepted upstream at the community level filling the underground storage space created by excessive pumping. Floods are
minimized or averted.
Source: IWMI
PILOTING UTFI ON THE GANGETIC PLAIN
BEFORE
AFTER
Image credits: IWMI
Community pond converted for UTFI in Jiwai Jadid village - the area is often flooded and GW levels have been falling, impacting on domestic water supplies and agricultural livelihoods
(a) Basin
(b) Pilot site(c) Recharge well
PILOT SITE
Site selection in western Uttar Pradesh
Pilot demonstration trial layout and design
SCIENTIFIC ADVANCEMENTS
Volumes of excess flow stored in aquifer are high (40-60 x 103 m3 per year)
2015 2016 2017 Season
Recharge
Season-
60
1000
2000
3000
4000
5000
6000
7000
25-J
ul-1
5
03-O
ct-1
5
12-D
ec-1
5
20-F
eb-1
6
30-A
pr-1
6
09-J
ul-1
6
17-S
ep-1
6
26-N
ov-
16
04-F
eb-1
7
15-A
pr-1
7
24-J
un-1
7
02-S
ep-1
7
11-N
ov-
17
Rec
har
ge r
ate
(m3/d
ay)
Silt has been effectively managed within the pond, filter and wells
Water quality risks have not been exacerbated
Potential to scale up to basin scale established through hydro-economic modelling
0
500
1000
1500
2000
2500
0 4 8 12 16
Dis
char
ge (m
3/s)
Return Period (years)
Baseline 10% 20% 30% 40% 50%
152
153
154
155
156
157
158
Grou
ndwa
ter ele
vatio
n (m)
Baseline 10% 20% 30% 40% 50%
RETURN PERIOD FLOW
GW LEVELS
FLOOD INUNDATION
MULTI-SCALE ENGAGEMENT AND IMPACT
VILLAGE LEVEL
DISTRICT LEVEL
STATE LEVEL
NATIONAL LEVEL
Consultation with villagers
Meeting CDO, Rampur
DIP Doc.
MWR site visit
• Acceptance of UTFI by the local community, including women
• Site maintenance formalized through MNREGA with community participation
• Support from the highest level decision makers in Rampur district
• Uptake by UP Govt by inclusion of UTFI in District Irrigation Plan PMKSY (Prime Ministers Irrigation Program)
• Growing support from Ministry of Water Resources
KEY MESSAGES GOING FORWARD
• First demonstration of community-owned assets converted
to UTFI in the Upper Gangetic Plain
• Strengthening evidence (technical & non-technical) to justify
that UTFI is effective in enhancing GW availability and
reducing flood risks
UTFI LINKAGES WITH SECTORS AND DEVELOPMENT ISSUES
Poverty Reduction
Ground-water
Floods
Irrigation
Water-sheds
UTFI Rural Development
• UTFI can be duly considered by policy makers and developers seeking solutions to development challenges relating to CCA, DRR and SDGs
THANKYOU
For further information go to: http://utfi.iwmi.org/
Undertaken by: With the support of: