STOCHASTIC SIMULATION OF HYDROLOGICAL DAT A IN THE BOLIVIAN HIGHLANDS

When stations are dispersed in a wide hydrometeorological network, the use of regression methods is complex and hazardous. This is the case for the Desaguadero river basin, located in the Bolivian highland plai n where the completion of missing data in hydrological series requires the use of stochastic models. These models were reviewed in order.to evaluate the possibility of eliminating the periodicity and sequential relationship of the hydrological series. This analysis allowed the de tection of the effect of groundwater rising from the water table and, to a lesser extent, that of hot springs. These conditions rendered the modelisation of the system complex. The use of stochastic models to r econstitute a new series statistically alike to the historic series wa s successful. The statistical characteristics of the new series are si milar to those of the observed series.