Hydrological Monitoring of TBIWRDP programme watersheds

2009-2012

Anteneh Kibret, TBIWRDP, BoWRD

Contents

1.Background and status of hydrological monitoring

2.Results – Decrease in sediment concentration

3.Institutionalization and post-project plan

Objective: Design and establish a hydrological monitoring programme, which will provide baseline and monitoring data regarding sediment and water balances in the Project Area

1.According to PIM, monitoring should take place at ”various scales”2.According to PIM, 10% reduction in sediment load is to be detected

In order to detect change in a natural system, sampling frequency must be highMicrowatershed monitoring (<10 km2) and Subwatershed monitoring (>100km2)

Objective and framework

Agreement of institutional ”home” (WB Finland mission 2009)

MMP BoWRD•Counterparts assigned 2009•Counterparts trained 2010•Budget allocated 2011 and idenpendently operational•Operative to some extent – but not providing timely data

Subwatershed Monitoring Programme MoWE Hydrology department•Capacity weak, little staff TsBO in 2012•Subwatersheds identified, measured, design and procurement plan drawn up•Routing for access roads made and design study ongoing

Indicators for hydrological monitoring programme

1. Hydrological monitoring programme functional, providing timely and accurate data

2. Hydrological monitoring program institutionalized and operated by a competent local institution with adequate financial resources

3. An increase in dry season baseflow or its duration4. A 10% reduction in suspended sediment load

measured over the project life.

Microwatershed Based Monitoring Programme – Status in December 2012

•Data collection on the central parameters since August 2009•17 stations established at the outlets of 15 microwaterhseds

•12 stations within the TBIWRDP area, while 5 stations are in ”control” waterhseds (no project activities taking place)•>9000 samples collected August 2009 – August 2012

Number of observations and samples in MMP 2009 – 2012 (August)

Flow measurements (190 with current meter, >200 float measurements, crest and Dipper data)Database (HYDATA) housed at BoWRD

Sediment concentration analyses

Sediment concentration analyses

Indicator 2: Baseflow Decrease?

No increase in surface runoff detected yet. On some stations initial increase 2010-2011, but clear decrease 2011-2012.

Average of all 17 stations monthly and moving annual average

Concurrently, recharging of natural springs and

increase in groundwater level reported in the

managed watersheds!

Sediment Yield and flow analyses

Sediment load reaching 14 000

tonnes / month in 2011

Sediment yield reaching 25 tonnes / ha/ month in 2011

Dry season flow increased in 2011, but decreased in

2012

Institutionalisation of MMP – Securing Sustainability

•MMP scale within BoWRD - two counterparts on part-time•BoWRD well capable to carry out MMP operations•Operational budgets prepared for MMP level O&M•Woreda Water Offices trained in equipments and sampling•Inclusion of Woreda level in MMP assessed – post-project plan is to integrate the MMP work in the Woredas routine operations

BoWRD Budget UtilisationActivities Year Utilized

budget (ETB)

Operational, laboratory analyses, salary, per diem, fuel & oil, stationery, maintenance

2011(2003-2004 EFY)

763843*

2012(2004-2005 EFY)

407598

*USD 41740 (rate 18.3), € 33210 (rate 23)

In 2010 the TB WME financend the MMP operations by 41000€ (953000 ETB) , not including petrol and oil and per diems.

Challenges MMP

• While the BoWRD is well capacitated to carry out routine operations, the entering of data and QA of entered data is not done timely

• Weak capacity for supervision and data analyses• Vehicles not available for routine monthly sample pick-up• High-tech equipments not useful at MMP due to the nature

of the floods, lack of capacity (no maintenance done, staff time not allocated)

• Conclusion: Routine operations well integrated in BoWRD work, but budget for continuous operations required, as well as full-time staff for MMP operations.

Action Plan 2013-2014• Maintenance and improvement of MMP

stations during dry season 2013 and 2014 • Proceed with subwatershed outlet stations

(TaSBO)

• QA and analyses of 2012 data• Analyses of crest stage, flow, dipper and

sediment load data (linking with TaSBO and universities, use of data for modelling)

Action Plan 2013-2014• Training of old and new staff members in

procedures, update manual• Collection of flow and integrated sediment

measurements throughout rainy season• Analyses of baseline vs actual data – comparisons

between land use, erosion control measures and sediment concentration data

• Continue interaction with BDU students, and other projects currently underway in the Tana subbasin (TsBO, A1, BDU/Ghent ”Tana Basin water balance”, other students (AA, Helsinki, Stockholm etc).

Action Plan 2013-2014• Institutionalize information production from

data analysis • Plan for post-project MMP monitoring –

reconsider which stations, what equipment?

ENTRO documentary making in March 2012 for Regional Capcity Building

Thank You!