Identifying water factors that are related to ammonia nitrogen concentrations in Columbia River using a reversed hazard exponential model - Santos, Danrley de Abreu dos; Martins, Andrey Cassiano; Silva, Kauana Mara da; Nunes, Amanda Correa; Miranda, Yara Campos; Battistelli, André Aguiar; Oliveira, Ricardo Puziol de; Camilo, Rodrigo; Achcar, Jorge Alberto (River Research and Applications, 2022)