At the Jucar river basin district 20% of the water bodies are water courses in which the flow rate is zero for long periods of time. This water bodies have in most cases a nonpermanent hydrological regime, however it is especially important to define the natural hydrological regime as well as the alteration degree. The main objective of this study is the characterization of the hydrological regime of nonpermanent water bodies without gauging station in the Jucar river basin district, throught the implementation of the hydrological model TETIS. In addition, the study includes the use and interpretation of the application TREHS, which is currently in development by the University of Barcelona within the framework of the Life TRivers project on temporary rivers. This application allows, on the one hand, the hydrological characterization of the temporal water bodies and on the other hand an evaluation of the degree of alteration of the natural regime. For this study four nonpermanent water bodies belonging to the Jucar river basin district have been selected, being this the Barranco del Carraixet, the Río Cervol, the Rambla de la Viuda and the Rambla de Alcalá. One of the main drawbacks when modeling nonpermanent rivers is the lack of gauging stations, so it has been necessary to previously calibrate the TETIS in the selected water bodies that have gauging stations (Rambla de la Viuda, Carraixet and Cervol), so that calibrations can be extrapolated for the modeling of temporary rivers that lack gauging stations. It is need to consider that in most of cases, the gauging stations of the nonpermanent rivers of the district are not in operation at present, and their hydrological series go back to the 1910s or 1930s. To be able to calibrate the model in this water bodies (Río Cervol), it has been necessary to request AEMET historical rainfall data. For the calibration of TETIS in water bodies with more recent hydrological series (Barranco del Carraixet and Río Cervol) have been used interpolated meteorological data from the Spain02 project prepared by AEMET and the Meteorology Group of the University of Cantabria (UNICAN), that collect precipitation and daily maximum and minimum temperatures on a regular mesh of high resolution in its version 4 (0.11ºx0.11º). The study starts with the TFMs realized by Hebert Tejada Espinoza and Ana Sánchez García on modeling with TETIS in Barranco del Carraixet and Rambla de la Viuda respectively. Nevertheless, these initial models don¿t allow to represent adequate representation of the null flow rates nor the spatial variability of the hydrological regime in these rivers. To this end, a modification has been introduced in the TETIS model that incorporates transmission losses into the riverbed, as well as karst areas and springs. These modifications have meant a very important improvement in the results obtained. In this respect indicate that the introduction of transmission losses into the riverbed in the model of the Rambla de la Viuda has been carried out within the TFM of Carlos Israel Montalvo. Later, TETIS was implemented in the Río Cervol and Rambla de Alcalá, in the first there is a gauging station with data between the years 1912 and 1929, for which the historical rainfall data provided by AEMET have been used, geological data of the IGME, data on land uses of Corine Land Cover and soil characteristics of the European Soil Database, among others. Regarding the implementation of the hydrological model TETIS in the Rambla de Alcalá, it should be considered that it does not have gauging stations, so it has been necessary to extrapolate the calibration obtained from the other rivers modeled. With respect to the application TREHS, in development, it allows to introduce hydrological information from different sources, like models, gauging stations, surveys or direct observations. In addition it allows to differentiate the information that responds to the unaltered natural reg