Potenciais%20impactes%20do%20fen%EF%BF%BD%EF%BF%BDmeno%20de%20urbaniza%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BDo%20portuense%20no%20ritmo%20intra%20e%20interanual%20de%20precipita%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BDo%20(1970-89)