Estimation Of Monthly Stream Flows Based On
The Sequential Water Budget Technique
Applied To The Thornthwaite
Potential Evapotranspiration
Author(s)
M. M. Portela & J. F. Santos
Abstract
In mainland Portugal, the measurement of stream flows started later than the
measurement of the majority of the other hydrologic variables. Also the former
measurements were not carried out systematically, thus resulting in stream flow
series not only with several faults, but also with reduced length, circumstances
that often compromise their utilization either for research or design purposes.
Based on the records at sixteen Portuguese climatologic stations it is stressed that
the sequential water budget technique applied to the Thornthwaite potential
evapotranspiration may provide a monthly stream flow evaluation model having
in view the fulfilment but, especially, the extension of monthly flow data. As the
number of parameters and the data requirements of the previous technique and
model are relatively modest it is possible, by that way, to estimate monthly
stream flows even in regions with scarce hydrologic information.
Keywords: sequential water budge, Thornthwaite and Penman-Monteith
potential evapotranspirations, evaluation of monthly stream flows.
1 Introduction: scope of the study
In Portugal mainland, the extensive and systematic measurement of stream flows
started later than that of the majority of the other hydrologic variables.
Furthermore, the corresponding series of flow records present not only frequent
sporadic flaws but also long interruptions thereby limiting their use for both
Keywords
sequential water budge, Thornthwaite and Penman-Monteith
potential evapotranspirations, evaluation of monthly stream flows.
Related Book
Other papers in this volume
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