Na orografski složenom i brdovitom terenu ponekad niti veći broj ombrografa nije dovoljan kako bi se precizno izmjerila prostorna raspodjela intenziteta oborine, zbog čega se u novije vrijeme sve češće koriste meteorološki radari u sklopu hidroloških analiza. U ovom radu je prikazana analiza pouzdanosti X-band radara u procjeni intenziteta oborine na polugodišnjem nizu kišnih događaja na riječkom području. Izmjerene vrijednosti s radara su uspoređene s dva ombrografa te je definirana nova Z-R radarska jednadžba. Nakon provedene kalibracije pokazalo se da je u 64% zabilježenih slučajeva radar vrlo dobro procijenio prostornu raspodjelu intenziteta oborine, iako je zabilježeno i 14% slučajeva vrlo slabe procjene..; On an orographically complex, hilly terrain, not even a larger number of ombrographs is sometimes sufficient to accurately measure the spatial distribution of rainfall intensity, due to which weather radars are increasingly used as part of the hydrological analysis in recent times. This paper presents the analysis of the X-band radar reliability in the rainfall intensity assessment in semi-annual series of rainfall events in the Rijeka area. The radar-measured values were compared with the values obtained from two ombrographs, and a new Z-R radar equation was determined. After the implemented calibration, it was determined that the radar made very accurate assessments of the spatial distribution of rainfall intensity in 64% of the recorded cases, although in 14% of the recorded cases the assessments were very poor.