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  • (2015 ..) - -

    - 12 14/ 2008 . HR R yn@vRSt# -

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    (2015 ..) -

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    12 14/ 2008 .

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    (2015) - -

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    1 . . 2 . . 3 4 5 4 6

    1 - 2 653 -9000 - 3 - 4 - 5 - 6 281 (8) -9000 / ( ) ( 1) 2014 ( )

    1- ( )

    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

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    ( 1) 10 20 ( 100 700 1200 )

    ( ) ( 2)

    2-

    ( 5 .) ()

    (2) ( ) ( 3) ()

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    3- ( ) ( 2014 )

    .. 2012 . ( ) ( 4 ) 60% ( 2015) ( 2015)

    .. 2012 . 88% ( ) ( 3-5 )

    4-

    (.) 1 ( 2014) )

    (1000..) (1000 .)

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  • 6

    5- () () () // ( 2014 )

    ( .. 2012 . 88% ( )

    -

    . ... ... . . . . 2014. Effects of the floodplain on river discharge into Lake Tana (Ethiopia). Journal of Hydrology, 519: 699-710. DOI: 10.1016/j.jhydrol.2014.08.007.

    . ... ... . . . . 2015. Water balance of a lake with floodplain buffering: Lake Tana, Blue Nile Basin, Ethiopia. Journal of Hydrology 522: 174-186. doi:10.1016/j.jhydrol.2014.12.049.

    ()

    ()

  • 7

    (lacustrine plain)

    12 1 3 1 4 1 2

    1 - 2 -9000 - 3 - 4 - -3001 -

    1. ( 2013 2008) ( 1998) ( 2015 2004)

    1-

    2.

  • 8

    .. 2012 13 4635

    ()

    ( /

    -) ( 1 1)

    20

    -

    () ( 2014) (3-1)

    1- ()

    .

    1 190 425 2 () 1,227 386 3 1,608 342 4 () 514 409 5 () 652 338 6 163 339 7 ( ) 1,394 485 8 ( ) 1,660 394 9 23 251

    10 () 3,653 472 11 () 1,656 490 12 ( ) 259 13 * 45

    -* ()

    11 (..) ( ) (Rating Curves) () ( ) ( 2) ( )

  • 9

    2. - 1 2 ( )

    ( ) ( ) () () - 1) 2) ()

    ( ) 7% ( 2011) 11.2 % ( 2005) 70 ( 2013 2005 2014) 7 ( 1986) -

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    3. ( 3 ) 5 ( 3 ) ( 2000)

    3-

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    () () (29 ) (21 ) (5 ) (3.5 )

    2- 2012-2013 . () ()

    () (/)

    (/ ./

    ) 163 28,509 175 190 70,227 370 23 4,733 206 () 1,656 762,622 461

    () 3,653 753,739 206

    () 1,227 545,268 444 1,608 274,591 171

    ( ) 514 119,325 232 () 652 64,225 99

    ( ) 1,166 92,876 80 ( ) 1,394 71,075 51

    4.

    12 3808 . 872 1739 . / ( 4 5 )

    () () 996,968

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    4-

    5- () () () ( )

    5.

    482,364 32% ( 2% 63%) ( 3) ( 2013)

    (10

    3 )

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    3- 2012-2013

    (/

    (/ )

    762,622 753,739 12,831 2 749,791

    545,268 274,591 342,106 63 203,163

    119,325 64,225 73,322 61 46,003

    - 92,876 71,075 54,105 58 38,771

    1,520,091 482,364 32 1,141,197

    6.

    1,094,276 ( ) 65% 35% ( 6)

    6- ( ) -

    7.

    1,043,888 49% 1.2 ( 2008) 869,907 / 0.28 ./ 24 50 0.42 ./ 59

  • 14

    8.

    7- 2012-2013 ( ) () ()

    9.

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    8-

    10.

    (4,327 ) () 49 ()

  • 16

    Abate, M., Nyssen, J., Steenhuis, T. S., Moges, M. M., Tilahun, S. A., Enku, T., & Adgo, E. (2015).

    Morphological changes of Gumara River channel over 50 years, upper Blue Nile basin, Ethiopia. Journal of

    Hydrology, 525, 152164. doi:10.1016/j.jhydrol.2015.03.044

    Adeogun, B. K., Igboro, S. B., & Ibrahim, F. B. (2011). Estimate of bed load transport in Kubanni Watershed

    in Northern Nigeria using grain size distribution data. International Journal of Water Resources and

    Environmental Engineering, 3(5), 102108.

    Asselman, N. E. M. (2000). Fitting and interpretation of sediment rating curves. Journal of Hydrology, 234,

    228248. doi:10.1016/S0022-1694(00)00253-5

    Dessie, M., Verhoest, N. E. C., Admasu, T., Pauwels, V. R. N., Poesen, J., Adgo, E., Deckers, J, Nyssen, J.

    (2014). Effects of the floodplain on river discharge into Lake Tana (Ethiopia). Journal of Hydrology, 519,

    699710. doi:10.1016/j.jhydrol.2014.08.007

    FAO. (1986). Ethiopian Highlands Reclamation Study (EHRS): Final report. Food and Agriculture

    Organization of the United Nations, Rome, Italy.

    Hanibal Lemma, Teshager Admasu, Mekete Dessie, Poesen, J., Enyew Adgo, and Nyssen, J., 2015.

    The sediment budget of Lake Tana (Ethiopia).Geomorphology, in prep.

    Kindye, E. G. (2013). Soil erosion rate and sediment yield under various land use types: The case of Kezin

    watershed, Lake Tana Basin, Ethiopia. MSc.Thesis, Natural Resources Management Department, Bahir Dar

    University.

    NBCBN.(2005). Watershed erosion and sediment transport.Nile Basin Capacity Building and Network.River

    morphology Research Cluster.

    Nyssen, J., Poesen, J., Moeyersons, J., Deckers, J., Haile, M., & Lang, A. (2004).Human impact on the

    environment in the Ethiopian and Eritrean highlandsa state of the art. Earth-Science Reviews, 64(3-4), 273

    320. doi:10.1016/S0012-8252(03)00078-3

    Poppe, L., Frankl, A., Poesen, J., Admasu, T., Dessie, M., Adgo, E., Deckers, J., Nyssen, J.

    (2013).Geomorphology of the Lake Tana basin, Ethiopia. Journal of Maps, 9, 431437.

    doi:10.1080/17445647.2013.801000

    SMEC. (2008). Hydrological Study of the Tana-Beles Sub-Basins: Main Report. Ethiopia: Ministry of Water

    Resources, Addis Ababa.

    Tilahun, S. A., Guzman, C. D., Zegeye, A. ., Ayana, E. K., Collick, A. M., Yitaferu, B., & Steenhuis, T. S.

    (2014). Spatial and temporal patterns of soil erosion in the semi-humid Ethiopian highlands: A case study of

    Debre Mawi watershed. In A. M. Meless, W. Abtew, & S. G. Setegn (Eds.), Nile River Basin:

    Ecohydrological challenges, climate change and cydropolitics (pp. 149163). Springer International

    Publishing.

    Zenebe, A., Vanmaercke, M., Poesen, J., Verstraeten, G., Haregeweyn, N., Haile, M., Amare, K., Deckers, J.,

    Nyssen, J. (2013). Spatial and temporal variability of river flows in the degraded semi-arid tropical mountains

    of northern Ethiopia. Zeitschrift Fr Geomorphologie, 57(2), 143169. doi:10.1127/0372-8854/2012/0080

  • 17

    1 2 3 1 [email protected] 2 . NL-6700

    1. ( 2006) ( 1996 2003 2005 2006) ( 2005) 28 4 (1) ; (2) (3) (4) ?

    2. ( 1) 1404 28 500.8 ( 1) 1816 3111 .. 1.6 100 368 (360.) 1984 (1976 .) - 50 10 10 - (mean canopy openness) (leaf litter depth) (5 ) (1.3 ) 5 10 . 5 . 1 . 10 . 1 . 10 10 5 5

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    168 (100 51 17 ) 69 (17 78) (4.8 111.5 / ) 5. (267 1553/ ) 1. (619 2421 ) (0 5263)

    ( 2) ( 3) 28 4 ( 4) (324=4.9 =0.008) (324=1.2 =0.31) (324=1.1 =0.36) (324=1.2 =0.31)

    ( 5) () ( 51-2) (

  • 19

    ) (- 31--4 ; r20.05)