BARBOSA, Dayse Luna.; http://lattes.cnpq.br/7376198442355112; BARBOSA, Dayse Luna.
Resumen:
The aim of this work is to study the behavior of a system of three reservoirs,
Tapacura, Goita and Varzea do Una, which are connected in parallel and designed for
multiple uses. They are part of the Capibaribe river basin, PE, located in the northeast
region of Brazil. The problem herein was to analyze and design optimal operating policies
for both the reservoirs water releases and irrigation sites nearby in order to maximize the
net profit, as well as the required labor, of irrigation and fishing activities. Several
scenarios based on different reservoirs initial conditions, system setup, water demands and
climate situations, which were characterized as average, dry and wet, were studied. The
ORNAP software (Curi & Curi, 1999), which is based on a nonlinear programming model
and works on a monthly base, was used to achieve optimal solutions for each scenario of
the problem. All the physical (reservoirs, spillways, channels, outlets, pumps and water
treatment station capacites and relationships), environmental (floods and environmental
water discharges), legal, operational (flood control, human water demands and
sustainabilities of the reservoirs) and agronomic (land use, cropping and irrigation patterns
and managerial limitations) constraints were taken into account. The constraints were
satisfied and the human water demands were garanteed for all the achieved results. The
results have show that the best economic performance is obtained when the reservoirs
withdraws for the human water demands are not regulated, that is, when the program is
allowed to choose the best monthly reservoirs water withdraws to couple with the human
demands. Moreover, the results are dependent upon the reservoirs initial storages while
considering the reservoirs sustainabilities. All the tests have also shown that the ORNAP is
suitable and applicable to analyze this kind of problems.
