Integral assessment of climate impact on the transboundary Mesta River flow formation in Bulgaria |
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| Authors: | Ivan K Diadovski Maya P Atanassova Ivan S Ivanov |
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| Institution: | (1) Bulgarian Academy of Science, Central Laboratory of General Ecology, 2 Gagarin Str, Sofia, 1113, Bulgaria;(2) Bulgarian Academy of Science, Institute of Water Problems, Acad. Bontchev Str. Bl. 1, Sofia, 1113, Bulgaria |
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| Abstract: | The present work considers the section of the Mesta River on Bulgarian territory using the integral method for evaluation
of climate and anthropogenic impact on the river flow.
The level of this impact is determined by the index K
i
(flow module), the coefficient C
i
for the deviation of the average annual water volume Q
i
from the flow norm Q
o
and the index h
i
for the deviation of the average annual rainfall volume H
i
from the average multi-annual rainfall volume H
o
.
The dynamics of the average annual flow Q
i
at two typical hydrometric stations – Yakoruda and Khadzhidimovo, as well as the dynamics of the average annual rainfall
for the Yakoruda station was examined for the period 1955–2003.
The data for the considered period 1955–2003 exhibit a decreasing trend of the average annual water volumes dynamics for both
stations due to the impact of climate changes in the Mesta River catchment. |
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| Keywords: | River flow Climate Trends Catchment |
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