# Pipe Sizing Report

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- Created by Abraham Toribio, last modified by Ashley Basten on Oct 15, 2018

The** Pipe Sizing Report** allows the user to view a range of **connection** and **pipe sizing data** in a range of layouts.

Once a **flow path** is selected from the first combo box the report will display information dependant on the **table layout**. The table layout can be selected from the second combo box.

The report can then be **exported to pdf.**

The current table layouts available are:

**Default: **A layout similar to the Pipe Sizing Results of previous versions.

**Name:** Name of the connection as shown on the plan view.

** Time of Travel: **The Travel Time is calculated as the Min. Time of Concentration from the

**Pipe Sizing**+ The Travel Time through the Upstream connections. The time of travel for a given connection is calculated using the Velocity of flow under full bore conditions and the length of the connection.

**Rainfall Intensity: **The Rainfall Intensity is determined from the IDF data, specified on the **Pipe Sizing**, based on the Travel Time for the given connection. The Rainfall Intensity is then used in the selected Calculation Method to determine the Flow used for Auto Sizing the pipes/channels.

**Total Contributing Area: **Total contributing area from connected **Inflows**. This is factored by the Runoff Coefficient specified per area before being summed. This includes all the upstream contributing areas.

**Total Area (Methode de Caquot only): **When completing the **Methode de Caquot** method the total area (not factored by Runoff Coefficient) is used rather than the contributing area.

**Total Base Flow: **Total base flow including all base flows from the upstream connections.

**Proportional Depth: **The Proportional Depth is the actual depth of water in the pipe for the calculated flow.

**Proportional Velocity: **The Proportional Velocity is the velocity of water in the pipeline (i.e. at the Proportional Depth) corresponding to the calculated flow.

**Pipe Full Velocity: **The Pipe Full Velocity is calculated using either the **Manning Formula** or the **Colebrook-White Formula **and is based on pipe full conditions.

**Capacity :**The Pipe Capacity is calculated using either the Manning's n or Colebrook-White equation and is based on pipe full conditions.

**Flow : **The flow is determined based on the calculation method selected in the **Pipe Sizing**:

**Rational Method****:** Flow = Rainfall Intensity x Total Area + Total Base Flow

**(UK) Modified Rational Method:** Flow = Rainfall Intensity x Total Area * Cr(1.3) + Total Base Flow

**Methode de Caquot: **Flow is calculated by a series of formulae used by the **Methode de Caquot.**

**Methode de Caquot: **The default data set when the Methode de Caquot is selected as in the **Pipe Sizing**.

**Name: **Name of the connection as shown on the plan view.

** Time of Travel: **The Travel Time is calculated as the Min. Time of Concentration from the

**Pipe Sizing**+ The Travel Time through the Upstream connections. The time of travel for a given connection is calculated using the Velocity of flow under full bore conditions and the length of the connection.

**Total Area: **When completing the **Methode de Caquot **method the total area (not factored by Runoff Coefficient) is used rather than the contributing area.

**Volumetric Runoff Coefficient: **This is the combined Runoff Coefficient determined by the ** Methode de Caquot** calculations as the areas are combined.

**Catchment Slope: **This is the combined Catchment Slope that is determined by the ** Methode de Caquot** calculations as the areas are combined.

**Total Base Flow: **Total base flow including all base flows from the upstream connections.

**Proportional Depth: **The Proportional Depth is the actual depth of water in the pipe for the calculated flow.

**Proportional Velocity: **The Proportional Velocity is the velocity of water in the pipeline (i.e. at the Proportional Depth) corresponding to the calculated flow.

**Pipe Full Velocity: **The Pipe Full Velocity is calculated using either the **Manning Formula** or the **Colebrook-White Formula **and is based on pipe full conditions.

**Capacity: **The Pipe Capacity is calculated using either the Manning's n or Colebrook-White equation and is based on pipe full conditions.

**Flow: **The flow is determined based on the calculation method selected in the **Pipe Sizing:**

**Rational Method****:** Flow = Rainfall Intensity x Total Area + Total Base Flow

**(UK) Modified Rational Method:** Flow = Rainfall Intensity x Total Area * Cr(1.3) + Total Base Flow

**Methode de Caquot: **Flow is calculated by a series of formulae used by the **Methode de Caquot.**

**Full: **A more complete set of data, including many of the details entered during Pipe Sizing.

Hidden Columns

**No. of Barrels**-To display this column, the flow path must include a pipe, box culvert or any channel**Height**- To display this column, the flow path must include a box culvert or any channel**Manning's n**- To display this column, the flow path must include a hydraulic connection with a manning's n value**Colebrooke-White Roughness**- To display this column, the flow path must include a hydraulic connection with a colebrooke-white roughness value**Corner Splay**- To display this column, the flow path must include a box culvert**Side Slope**- To include this column, the flow path must include a Trapezoidal or Triangular Channel

**Name: **Name of the connection as shown on the plan view.

**From: **The label of the item at the upstream end of the connection.

**To: **The label of the item at the downstream end of the connection.

**Length: **Length of the connection. If in red - the length was defined by the user, otherwise, it was calculated using the Connections coordinates from the plan view.

**Connection Type: **The type of the connection:

**No Delay**- Imposes no effect of the movement of water.**Lagged Flow**- Introduces a time delay on the movement of water based on the Time of Travel value entered. Velocity and Time of Travel columns are shown by default.**Attenuated Flow**- Introduces a time delay and adjustment to the flow hydrograph using Muskingum based on the Time of Travel and Retention Coefficient. Velocity, Time of Travel and Retention Coefficient columns are shown by default.**Pipe Connection -**Allows a pipe, or series of parallel pipes, to be modelled with a Diameter, Longitudinal Slope and levels. The dimensions can be entered as required or calculated using the**Pipe Sizing**calculation. Slope, Manning's n, Diameter/Base Width, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level and Downstream Invert Level columns are shown by default.**Box Culvert**– Allows a Box Culvert, or a series of parallel culverts, to be modelled with a Base Width, Height, Corner Splay, Longitudinal Slope and levels. The dimensions can be entered as required or calculated using the**Pipe Sizing**calculation. Slope, Manning’s N, Diameter/Base Width, Height, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level, and Downstream Invert Level are shown by default.**Rectangular Channel**- Allows a Rectangular channel, or series of parallel channels, to be modelled with a Base Width, Height, Longitudinal Slope and levels. The dimensions can be entered as required or calculated using the**Pipe Sizing**calculation. Slope, Manning's n, Diameter/Base Width, Height, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level and Downstream Invert Level columns are shown by default.**Trapezoidal Channel**- Allows a Trapezoidal channel, or series of parallel channels, to be modelled with a Base Width, Side Slope, Height, Longitudinal Slope and levels. The dimensions can be entered as required or calculated using the**Pipe Sizing**calculation. Slope, Manning's n, Diameter/Base Width, Height, Side Slope, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level and Downstream Invert Level columns are shown by default.**Triangular Channel**- Allows a non-symmetrical Triangular channel, or series of parallel channels, to be modelled with a Side Slope, Height, Longitudinal Slope and levels. The dimensions can be entered as required or calculated using the**Pipe Sizing**calculation. Slope, Manning's n, Height, Side Slope, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level and Downstream Invert Level columns are shown by default.

**Slope: **Longitudinal slope of the connection. This is calculated based on the Fall, between the upstream & downstream invert levels, along the Length of the connection. Entering a value for the slope will therefore adjust the downstream invert level.

**Manning's n: **Manning's coefficient for the connection, which will be used in velocity and flow/capacity calculations.

**Colebrook-White Roughness: **Colebrook-White roughness for the connection, which will be used in velocity and flow/capacity calculations.

**No. of Barrels: **Number of barrels/channels laid in parallel.

**Diameter/Base: **Diameter of the connection if a Pipe, or base width of a Rectangular or Trapezoidal channel.

**Height: **Height of a Rectangular, Trapezoidal or Triangular channel.

**Corner Splay: **Introduced into a Box Culvert for pipe strengthening purposes. This value cannot be greater than half the current Width or half the current Height. The default value is 0 and will not be automatically adjusted.

**Side Slope: **Slope of the sides of a Trapezoidal or Triangular channel.

**Upstream Cover Level: **The cover/exceedence level at the upstream end of the connection. Levels may be set automatically if sufficient data exists, see individual connection type pages for more details.

**Upstream Invert Level: **The invert level at the upstream end of the connection. Levels may be set automatically if sufficient data exists, see individual connection type pages for more details.

**Downstream Cover Level: **The cover/exceedence, level at the downstream end of the connection. Levels may be set automatically if sufficient data exists, see individual connection type pages for more details.

**Downstream Invert Level: **The invert level at the downstream end of the connection. Levels may be set automatically if sufficient data exists, see individual connection type pages for more details.

**Total Area: **The total area (not factored by Runoff Coefficient) is used rather than the contributing area. Does NOT include all upstream contributing areas.

**Volumetric Runoff Coefficient: **The average (per unit area) preliminary sizing volumetric runoff coefficient of all inflows to the connection.

**Local Time of Concentration: **The time required for water to travel from the hydraulically most distant point of the drainage area to the inlet at the upstream end of the storm drain run under consideration.

**Time of Travel: **The Travel Time is calculated as the Min. Time of Concentration from the **Pipe Sizing **criteria + The Travel Time through the Upstream connections. The time of travel for a given connection is calculated using the Velocity of flow under full bore conditions and the length of the connection.

**Rainfall Intensity: **The Rainfall Intensity is determined from the IDF data, specified on the **Pipe S****izing **criteria, based on the Travel Time for the given connection. The Rainfall Intensity is then used in the selected Calculation Method to determine the Flow used for Auto Sizing the pipes/channels.

**Total Base Flow: **Total base flow including all base flows from the upstream connections.

**Proportional Depth: **The Proportional Depth is the actual depth of water in the pipe for the calculated flow.

**Proportional Velocity: **The Proportional Velocity is the velocity of water in the pipeline (i.e. at the Proportional Depth) corresponding to the calculated flow.

**Pipe Full Velocity: **The Pipe Full Velocity is calculated using either the **Manning Formula **or the **Colebrook-White Formula **and is based on pipe full conditions.

**Capacity: **The Pipe Capacity is calculated using either the Manning's n or Colebrook-White equation and is based on pipe full conditions.

**Flow: **The flow is determined based on the calculation method selected in the **Pipe Sizing** criteria:

**Rational Method****:** Flow = Rainfall Intensity x Total Area + Total Base Flow

**(UK) Modified Rational Method:** Flow = Rainfall Intensity x Total Area * Cr(1.3) + Total Base Flow

**Methode de Caquot: **Flow is calculated by a series of formulae used by the **Methode de Caquot**.

**HEC-22: **The layout used by Hydraulic Engineering Circular No. 22 for preliminary storm drain computation.

** Name: **Name of the connection as shown on the plan view.

**From: **The label of the item at the upstream end of the connection.

**To: **The label of the item at the downstream end of the connection.

**Length: **Length of the connection. If in red - the length was defined by the user, otherwise, it was calculated using the Connections coordinates from the plan view.

**Incremental Drainage Area 'AInc': **Individual area from connected **Inflows.**

**Total Drainage Area 'ATot': **Total area from connected **Inflows.** This includes all the upstream contributing areas.

**Volumetric Runoff Coefficient 'C': **The runoff coefficient for the drainage area tributary to the inlet at the upstream end of the connection.

**AInc X C: **The incremental Drainage area multiplied by the runoff coefficient for the drainage area tributary to the inlet at the upstream end of the connection.

**Total AInc X C: **Total contributing area from connected **Inflows.** This is factored by the Runoff Coefficient specified per area before being summed. This includes all the upstream contributing areas.

**Local Time of Concentration: **The time required for water to travel from the hydraulically most distant point of the drainage area to the inlet at the upstream end of the storm drain run under consideration.

**Total System Travel Time: **The Travel Time is calculated as the Min. Time of Concentration from the **Pipe Sizing**** **criteria + The Travel Time through the Upstream connections. The time of travel for a given connection is calculated using the Velocity of flow under full bore conditions and the length of the connection.

**Rainfall Intensity 'I': **The Rainfall Intensity is determined from the IDF data, specified on the **Pipe Sizing** criteria, based on the Travel Time for the given connection. The Rainfall Intensity is then used in the selected Calculation Method to determine the Flow used for Auto Sizing the pipes/channels.

**Runoff Flow 'Q': **The flow is determined based on the calculation method selected in the **Pipe Sizing **criteria:

**Rational Method****:** Flow = Rainfall Intensity x Total Area + Total Base Flow

**(UK) Modified Rational Method:** Flow = Rainfall Intensity x Total Area * Cr(1.3) + Total Base Flow

**Methode de Caquot: **Flow is calculated by a series of formulae used by the **Methode de Caquot.**

**Diameter / Base Width: **Diameter of the connection if a Pipe, or base width of a Rectangular or Trapezoidal channel.

**Full Flow: **The Full Flow is calculated using either the Manning's n or Colebrook-White equation and is based on pipe full conditions.

**Pipe Full Velocity: **The Pipe Full Velocity is calculated using either the **Manning Formula** or the **Colebrook-White Formula **and is based on pipe full conditions.

**Design Velocity: **The Design Velocity is the velocity of water in the pipeline (i.e. at the Proportional Depth) corresponding to the calculated flow.

**Section Time: **The travel time in the pipe section. Calculated by dividing length by the design velocity.

**Upstream Invert Level: **The invert level at the upstream end of the connection. Levels may be set automatically if sufficient data exists, see individual connection type pages for more details.

**Downstream Invert Level: **The invert level at the downstream end of the connection. Levels may be set automatically if sufficient data exists, see individual connection type pages for more details.

**Crown Drop: **Calculated by subtracting the downstream invert level of the previous connection from the upstream invert level of the current connection.

**Slope: **Longitudinal slope of the connection. This is calculated based on the Fall, between the upstream & downstream invert levels, along the Length of the connection. Entering a value for the slope will therefore adjust the downstream invert level.