Pengembangan strategi pengendalian pencemaran air sungai Cimanuk bagian hilir (Studi di Sungai Cimanuk Bagian Hilir, Jatibarang, Indramayu, Jawa Barat) = Development of water pollution control strategies of Cimanuk river downstream (Study in Cimanuk River Downstream, Jatibarang, Indramayu, West Java)