wSummary
@This is the second of three papers describing hydrologic analyses
of monthly and annual streamflow data for a global set of 729
unregulated rivers with at least 25 years of continuous data.
capacity estimates of hypothetical reservoirs are computed for
each river using the Sequent Peak Algorithm (SPA), Behaviour analysis
and the Gould-Dincer Gamma procedure. Based on SPA and Behaviour
procedures, empirical relationships relating reservoir capacity
and yield were developed which accounted for 87-96 of the variance
in capacity estimates across the global data set of monthly streamflows.
The theoretical Gould-Dincer Gamma procedure was also shown to
be a suitable technique to estimate reservoir capacity-yield relationships.
It is noted that the three procedures are based on different definitions
of supply reliability.
@Continental variations of the estimated capacities under equivalent
conditions are examined. Reservoir performance measures - reliability,
resilience and dimensionless vulnerability - are computed and
their continental variations described. As a result of these analyses
a number of differences are noted about the performance of reservoirs
across continental regions. For example, the median continental
reservoir capacity as a ration of the mean annual flow varied
by a factor of 9 across the continental regions. Furthermore,
based on the reliability metric as an example of reservoir performance,
high reliabilities occur in the South Pacific and Europe, slightly
less reliable systems in North and South America, lower still
in northern Africa, followed by Australia and the lowest value
in southern Africa. This distribution follows inversely with the
coefficient of variation of annual streamflow between continents.
Keywords: Global rivers; Global hydrology; Reservoir capacity-yield;
Reservoir performancex
Introduction
Annual and monthly streamflow data
Reservoir storage estimates based on global data
@Sequent peak algorithm
@Behaviour storage estimates
@Summary comment regarding SPA and behaviour models
@Gould-Dincer Gamma
@Extended deficit analysis
Continental variations of reservoir storage estimates
Reservoir storage performance
@Metrics of storage performance
@Continental variation of reservoir storage performance
Conclusions
Acknowledgements
References