Hydro Statistical Assessment of TRMM and GPM Precipitation Products against Ground Precipitation over a Mediterranean Mountainous Watershed (in the Moroccan High Atlas)

The tropical Rainfall Measuring Mission TRMM 3B42 V7 product and its successor, the Global Precipitation Measurement Integrated Multi-satellitE Retrievals for GPM IMERG high-resolution V5, have been validated against rain gauges precipitation in an arid mountainous basin where ground-based observations of are sparse, or spatially undistributed. This paper aims to evaluate hydro-statically performances V05 satellite precipitations products SPPs, at multiple temporal scales, from 2014 2017. SPPs compared with gauge station show good results both statistical contingency metrics notable values R > 0.94. Moreover, rainfall-runoff events implemented on hydrological model were performed 3-hourly time steps showed satisfactory based obtained Nash–Sutcliffe criteria ranging 94.50% 57.50%, 89.3% 51.2%, respectively. tends underestimate not capture extreme events. In contrast, can identify variability small steps, although a slight underestimation detection be corrected during validation steps. proposed method is interesting approach solving problem insufficient observed data Mediterranean regions.