Water Balance of the Mbói Caé Watershed Associated to “El Niño-Southern Oscillation” through the Hydro-BID System

Universidad Nacional de Itapúa, Paraguay

Abstract: The management and planning of water resources are essential processes of the populations to resolve conflicts of the actual water crisis. To can plan and manage, it is necessary to have information about of water in watershed and principally with respect to climate. Hydro-BID is an integrated and quantitative system to simulate hydrology and water resources management under change scenarios. So this system was used to simulate the water balance of the Mbói Caé watershed in a period influenced by the climatic phenomenon El Niño-Southern Oscillation with the objective of generating useful information for the adequate Integrated Water Resources Management in southern Paraguay using hydrometeorological data of temperature, precipitation and flows in the period 2013 to 2016. The influence of the phenomenon was higher in its pre-initial phase in the year 2014 with inflow in the watershed of 6261.4 million m3 and with a total precipitation of 2.32 million m3 and on the other hand, in 2013 (year that El Niño does not appear) had 2553.3 million m3 of inflow with 1.36 million m3 of precipitation. In 2015 (year of evolution of the phenomenon) and 2016 (year of the end of the phenomenon), the values oscillated 4625.1 and 3978.4 million m3 respectively of inflow with 1.72 and 1.41 million m3 of precipitation. It is important to mention that this phenomenon is not the only cause of abundant rainfall in that region.