ANALYSIS OF THE RELATIONSHIP BETWEEN TOTAL AND EFFECTIVE RAINFALL BY MEANS OF STREAMFLOW SHOT-NOISE AND RAINFALL STOCHASTIC-MODELS

Linking the results of two research topics on rainfall and streamflow stochastic models, the relationship between total and effective rainfa ll is studied here. The short time streamflow process is examined conc erning the climatic and hydrogeological characters of the watershed, i dentifying four distinct components giving rise to runoff. In this way the watershed can be regarded as a four-component linear system, whos e input is the effective rainfall. Finally, the streamflow model is us ed as an effective rainfall inverse estimator, allowing the analysis o f the links between total and effective rainfall assuming a simple tra nsformation law. The determination of this law is performed by applyin g a stochastic model, whose parameters are estimated on the companion series of recorded total rainfall and reconstructed effective rainfall . An application to a case study shows the effectiveness of the propos ed approach.