P1.4.4.4 Regular Flow (from Low or no flows. Re develop maintenance and intake). spring area. Failure of the inspections of the intake Review intake. structure. maintenance Early warning and inspection system installed to procedures. indicate change in flow. P1.4.4.5 Intake inspections, Weather Reduced or no Repair regularly and conditions. flow. damage and Catastrophic directly after floods revise failure (eg, etc, with follow-up inspection flood, slips or action if required schedule. for existing protection (eg, damage). fences, vegetation and soil instability). Telemetric alarm at treatment plant for low flows. 1 The of risk will probably increase the lower the flow of the water is. Preventive measures Checking preventive measures Corrective action Causes What to check Signs that action is needed Event: TOO LITTLE WATER CAN BE DRAWN FROM THE SPRING TO MEET DEMAND cont’d P1.4.4.6 Maintenance Telemetric No water. New pumps. according to records. Pump failure Alarm activated. Instigate manufacturers’ (see Guide 10). Maintenance maintenance No maintenance recommendations. records. programme. record. Standby pump with auto-switch to alternate pumps. Operate duty and standby using an alternate of days‘ ‘number cycle. Telemetric alarm for low flows. P1.4.4.7 Regular inspection to No flow. Review with of cabling, power indicate faults. power Power failure. lines and authority. connectors. Stand-by generator. Battery backed-up alarms. P1.4.4.8 Construct a fence Damage to the around the intake intake. Vandalism/ site. sabotage. Evidence of Install intruder attempts to gain alarm. access to the intake.
P1.4.4.4 Failure of the intake structure. Regular maintenance and inspections of the intake. Early warning system installed to indicate change in flow. Flow (from intake). Low or no flows. Re develop spring area. Review maintenance and inspection procedures. P1.4.4.5 Catastrophic failure (eg, flood, slips or damage). Intake inspections, regularly and directly after floods etc, with follow-up action if required for existing protection (eg, fences, vegetation and soil instability). Telemetric alarm at treatment plant for low flows. Weather conditions. Reduced or no flow. Repair damage and revise inspection schedule. 1 The of risk will probably increase the lower the flow of the water is. Causes Preventive measures Checking preventive measures Corrective action What to check Signs that action is needed Event: TOO LITTLE WATER CAN BE DRAWN FROM THE SPRING TO MEET DEMAND cont’d P1.4.4.6 Pump failure (see Guide 10). Maintenance according to manufacturers’ recommendations. Standby pump with auto-switch to alternate pumps. Operate duty and standby using an alternate ‘number of days‘ cycle. Telemetric alarm for low flows. Telemetric records. Maintenance records. No water. Alarm activated. No maintenance record. New pumps. Instigate maintenance programme. P1.4.4.7 Power failure. Regular inspection of cabling, power lines and connectors. Stand-by generator. Battery backed-up alarms. to indicate faults. No flow. Review with power authority. P1.4.4.8 Vandalism/ sabotage. Construct a fence around the intake site. Install intruder alarm. Damage to the intake. Evidence of attempts to gain access to the intake.