... discussed in this paper. The need for a better water quality management and monitoring network in the river system are presented. Not only irrigation control but also for industrial and population ... canal systems are not only used for irrigation, drainage but also for water supply, fishery, local transport by boat. As general guideline, the systems are designed for an irrigation supply of ... E.coli and coliform indexes are of sufficient good water quality and sanitary standard (Ve et al., 2002). Seto (2002) based on 37 samples form 6 provinces found high fluctuations for EC, Sulfate,...