This　paper　takes　a　typical　channel　passage　in　the　middle　route　of　the　South-to-North　water　diversion　project　as　an　example　to　study　emergency　control　strategies　for　unexpected　water　pollution　accidents.　A　one-dimensional　Saint　Venant　equation　and　water　quality　numerical　model　is　developed,　considering　limitations　such　as　the　migration　velocity　of　pollutants,　water　level　fluctuation,　and　variations　in　the　channel.　Emergency　control　strategies　for　each　gate　are　proposed　for　unexpected　water　pollution　accidents　and　gate　closing　rules　are　established.　Parameters　such　as　the　channel　water　depletion　rate,　stabilization　time,　water　level　fluctuation,　and　water　quality　are　simulated　under　different　control　strategies　in　order　to　ensure　the　safe　operation　of　water　transport　and　to　decide　on　the　control　strategy　for　unexpected　water　pollution　accidents.　Such　studies　can　provide　reference　information　for　the　development　of　emergency　strategies　in　the　middle　route　of　the　South-to-North　water　diversion　project.　©　(2014)　Trans　Tech　Publications,　Switzerland.