RISK ANALYSIS AND ECONOMIC FEASIBILITY EVALUATION OF FLOOD MITIGATION IN THE SIAK RIVER BASIN. GEOMATE Journal, [S. l.], v. 31, n. 143, p. 93–105, 2026. DOI: 10.21660/2026.143.5404. Disponível em: https://geomatejournal.com/geomate/article/view/5404. Acesso em: 25 aug. 2026.