1. Watershed Monitoring and Evaluation (WME) component of the Tana Beles Integrated Water Resources Development Project (TBIWRMP) in Ethiopia Hydrological Baseline and monitoring programme 8 th July 2009 Bahr Dar Dr. Mikaela Kruskopf, WRM Advisor

2. Soil loss  sediment load StationLength of record Catchment area (km 2 ) Sediment load ('000 tons/yr) Soil loss in (t/km 2 /yr) Annual av. discharge (m 3 /s) Gilgel Abay, near Merawi 1980-19921,6642,821.01,695.358.17 Gumara, near Bahir Dar 1980-19921,3941,937.11,39027.18 Megech at Azezo 1980-1992462263.05697.5 Abay at Kessie 1982-199265,78449,404.0751450.5 Muger, near Chancho 1980-199248938.2789.26 Abay at Bahir Dar 1980-199215,3212,191.0143111.32 Guder at Guder 1980-199252447.29012.63 Birr, near Jiga 1980-19929752,075.42,12917.86 Dura, near Metekel 1980-1992539386.5717 Angar, near Nekemte 1980-19854,674701.915062.79 Dabana, near Abasina 1980-19842,881452.915757.35 Angar, near Gutin 1982-1983, 1986-1992 1,975176.389 Beles, near Metekel 1983-19923,4311,563.345651.38 Abay at border 1980-1991172,254140,000.07001555.73 Source: Abay Basin Master Plan Study

3. Sampling and testing 2009 Existing site – Hydrology Department annual monitoring WME sites

4. Activities in the microwatersheds Identification of sites for sediment measurement Installation of basic measurement stations Village Based Monitoring System Detailed hydrological monitoring baseline (with hydrology department staff) In-depth studies (e.g. Runoff plot measurements, modelling, intensive sampling using automatic loggers)

5. Sites with well defined water channel Sites where Watershed management activities are taking place Sites were no activities will be implemented (control) Sites of a suitable catchment size

6. Defining the channel cross section Measuring current (three to four times during various water heights)

7. Staff gauge (for water level recording)

8. Alternative staff gauge! Measuring water level (daily, through KWT / villager participation)

9. WME TA staff will: Install rain gauges, Install staff gauges WME TA staff will teach one data collector from the site to: Take readings of daily (or hourly) rainfall Take readings of daily water level (and during floods) Measure secchi depth and Take water samples at high turbidity (when secchi < 1 cm) for analysis TA staff of BDU student will: Collect samples and data once a month Take current measurements 3-4 times Village Based Participatory Monitoring Programme

11. Other factors affecting the hydrology, requiring additional studies Lithology, land use, gully density, topography and connectivity (part of the NRM baseline, and of Community Watershed activities) Variations in rainfall amount and intensity – possible intensive recording to detect natural variation

12. Other factors affecting the hydrology, requiring additional studies Extreme events (floods, droughts, storms) – possible intensive recording to detect natural variation in soil transport

13. Other factors affecting the hydrology, requiring additional studies Variation in eroded soil type: suspended or bedload – possible in-depth study to measure bedload Impact of land use on sedimentation – possible in-depth study using runoff plot experiments