Wrangling between two departments over responsibility for flood control in urban areas amounted to a dereliction of duty, it was claimed yesterday. The Public Accounts Committee condemned disputes between the Drainage Services Department and the Territory Development Department over the management of newly built culverts in West Kowloon. It said the wrangling had delayed maintenance, aggravating flooding problems in Mongkok in 1997. 'There was a lack of co-operation between the two departments as they tried to shirk responsibility for de-silting work in order to avoid the cost, ignoring the public interests,' the watchdog said. Director of Drainage Services John Collier was also criticised for neglect of duties. The committee said he had failed to check the flood-prevention studies of a consultant whose errors were only discovered two years later. A Works Bureau spokesman said the Government would take note of the comments.