Channel Section Efficiency Report
- Julia Williams
Report Description
The Channel Section Efficiency report calculates the water balance for all pools in the report area including uncertainty calculations. It measures the pool by pool efficiency of the channel by listing the absolute difference between total volume inflow and outflow, and the percentage of the inflow volume supplied for orders.
Use the report to list calculated efficiency pool by pool for the selected area. This can be used to detect anomalous losses or measurement issues.
If you prefer to filter the results, you can run the Channel Flow Inaccuracy Report which allows you to specify threshold values for the volume gap and the pool efficiency.
Report Parameters and Options
Parameter | Description |
|---|---|
Area/Regulator | Select either an area, or a specific regulator.
|
Start/End Date | Choose a date range for the report. |
Report Output
Field | Description |
|---|---|
Channel | Name of the channel |
Pool U/S Regulators | Upstream regulator (that is, the inflow regulator) for this pool |
Type | Site type of upstream regulator |
Inflow (ML) | Total volume of water that flowed into this pool for the period. This includes water supplied through the upstream regulator and any water flowing in from side channels. |
Main Passing Flow (ML) | Total volume of water that flowed out of the pool through the next regulator downstream in the channel (that is, the next regulator that has the same channel attribute value as the regulator at the top of the pool.) |
Spur Passing Flow (ML) | Total volume of water that flowed out of the pool through spur channels (that is through adjacent downstream regulators that have a different channel attribute value than the regulator at the top of the pool. |
Outfalls (ML) | Total volume of water that flowed out of the pool through outfalls which are the most downstream regulators in a channel. Note that you can use the Channel Section Listing Report to generate a list of outfalls downstream of any regulator. |
Metered Deliveries (ML) | Volume delivered to outlets and recorded as meter readings |
Estimated Deliveries (ML) | Volume delivered to outlets without meter readings. This may be estimated in two ways:
The estimate will be based on order data unless the outlet type is specified in the Object Type SCADA Volume Parameter. |
Total Deliveries (ML) | Sum of the metered and estimated deliveries. |
Gap (ML) | Calculated from Inflow - Total Outflow |
Pool Efficiency % | Calculated from (Total Deliveries / Inflow) x 100 |
How is the Outflow Volume Calculated?
The volume calculation depends on the type of regulator involved and what tags are configured for the regulator. The report uses the following tags in order of priority:
If a Current Group Volume for Season (FLOW_GROUP_ACU_TOTAL) tag is available (this will only apply at a multigate SlipMeter site) then calculate the total volume for the period by subtracting the earliest event value from the latest value in the period.
Otherwise if a Volume Increments (FLOW_ACU_SR_INC) tag exists then sum the tag events for the period.
Otherwise if a Current Volume for Season (FLOW_ACU_TOTAL) tag exists, then calculate the total for the period by subtracting the earliest event value from the latest value in the period.
If none of the above tags are available then integrate the Current Flow (FLOW_VAL) tag events within the period to calculate the volume.
Related Reports
Channel Flow Inaccuracy Report
The Channel Flow Inaccuracy report calculates the water balance for all regulators in the report area. It measures the efficiency of the channel by listing the absolute difference between total volume inflow and the outflow, and the percentage of the total inflow volume supplied for orders. You can filter the pools included in the report by pool efficiency, and by the gap between inflow and outflow.
The Channel Section report calculates the water balance for all the pools in the report area but does not include uncertainty calculations.
Channel Section Listing Report
The Channel Section Listing report lists the details of all gates and meters in the report area, grouped by the pool in which the objects are located.
The Monthly Efficiency report calculates the water balance and efficiency for the report area on a month by month basis. It incudes calculations of uncertainty.
Relative Volume Uncertainties Report
The Relative Volume Uncertainties report lists the uncertainties set up for various network object types. These uncertainties are used to calculate the uncertainty in flow and volume calculations for the object type and are held in the Object type relative uncertainty parameter.