Aplicação do modelo WEAP na avaliação de alocação de água do reservatório dos Pequenos Libombos, Moçambique
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2020-02-12
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Universidade Federal de Goiás
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The issue of satisfying human and environmental water needs has been tackled in the water
resources management and planning framework in the Africa Austral. Currently, the Umbeluzi
river basin is Greater Maputo main source of water supply. This study was driven by
uncertainties generated by difficulties in meeting future water needs. What can happen to
water supply if the patterns of population growth, industrial growth and increase in irrigation
areas change? This article aims at assessing the capacity of meeting water needs in the
Greater Maputo area in Mozambique through application of WEAP (Water Evaluation and
Planning System). WEAP is a model that allows simulation of water resource systems with
multiple uses in an integrated manner. The case study is the Mozambican part of the
Umbeluzi River basin. Four scenarios were simulated: the reference scenario which
corresponds to the on-going exploitation; three impact scenarios: Lower Growth that
represents lower values of growth of consumption sites, Trend that reflects average growth
values of consumption sites and Greater Growth which corresponds to higher values of
population growth, expansion of the agricultural and industrial area, between 2018 and 2040
and adaptation measure. The methodology included the estimation of affluences to the
system obtained from the results of the Water Year Method. An assessment of the capacity to
meet water needs was made using indicators such as coverage and supply guarantee. The
results obtained show the system's inability to meet current and future needs. The system has
an annual water supply guarantee of 70.9% and 63.5% in the Reference and Lower Growth
scenarios, with more critical values of 42.1% and 31.7% in the Trend and Higher Growth
scenarios. All scenarios have an average duration of each failure exceeding three months.
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NOTISSO, P. F. Aplicação do modelo WEAP na avaliação de alocação de água do reservatório dos Pequenos Libombos, Moçambique. 2020. 72 f. Dissertação (Mestrado em Ciências Ambientais) - Universidade Federal de Goiás, Goiânia, 2020.