31416902erosion protection worksPT2026-03-30 20:52:11UF31416903water flow control worksNDUF31416904works, erosion protectionNDBT31381048hydraulic structures by functionPTNT31442299breakwatersPTNT31442301gabionsPTNT31442303groinsPTNT31442306wing damsPTNT31442313hydraulic gatesPTNT31442317jettiesPTNT31442319riprapPT