『Summary
This is the final paper in a series of three dealing with global
hydrology based on a world-wide historical data set of monthly
and annual streamflow records. In this paper hypothetical reservoir
capacity estimates and reservoir-yield performance characteristics
are compared between countries and between climate zones. The
comparison for each characteristic is based mainly on its median
value. For the comparison based on countries, the median value
for 17 countries was based on at least 10 rivers, and for a further
19 countries on at least three rivers within the country. For
the 30 Koppen(oの頭に¨) climate zones, 13 zones
had at least 10 rivers and a further seven zones were represented
by at least three rivers. Some conclusions include: rivers in
the Sahel region of Africa exhibit larger inter-decadal variances
compared with those for other global rivers; the observation that
western Canadian rivers display longer run lengths than expected
from an AR(1) model may be due to the influence of the Pacific
Decadal Oscillation; between countries, storage resilience is
strongly positively related to reliability, and dimensionless
vulnerability is strongly negatively related to reliability; and
finally, rivers in countries observed for several rivers in Finland
and Sudan, that large natural lakes, not unexpectedly, increase
streamflow auto-correlation and thereby reduce a reservoir's ability
to recover quickly following a major deficit.
Keywords: Global rivers; Global hydrology; Country; Climate zones;
Reservoir capacity-yield characteristics』
Introduction
Data
Analyses
Results and discussion
Annual flow statistics
Persistence
Runs below the median
Hypothetical reservoir capacity estimates
Reservoir storage-yield performance
Conclusions
Acknowledgements
References