Check Files 1d mhc

This GIS layer contains information on the Manholes in the 1D model. Manholes are used to model energy losses at junctions and can occur in the same location as pit channels (which convey water between the ground and the underground drainage network). The manholes can be manually assigned or automatically created and numerous loss methods are available. Refer to the TUFLOW Manual for further guidance.

Attributes of mhc_check

Attribute Name	Attribute Description
ID	The ID of the manhole.
Type	The type of manhole. Refer to the TUFLOW Manual for a full list of available manhole types.
Loss_Approach	The manhole loss approach. The options are outlined in the TUFLOW Manual.
Ignore	"T" (true) if the manhole has been set to ignore in the input 1d_mh file, "F" (false) otherwise.
Invert_Level	The bottom or bed elevation of the manhole.
Flow_Width	The flow width of the manhole chamber. Losses are calculated as the flow expands into the manhole chamber and contracts into the outgoing channel.
Flow_Length	The length of the manhole chamber in the direction of flow.
ANA	Additional storage surface area for the node at the manhole (value in square metres or square feet).
K_Fixed	Fixed component of the calculated manhole loss coefficient. If using the Fixed approach, this is the only coefficient applied.
Km	Manhole exit coefficient used by the Engelhund approach.
K_Bend_Max	The upper limit of the combination of KƟ and Kdrop in the Engelhund approach.
C_reserved	Not used.
N1_reserved	Not used.
N2_reserved	Not used.
N3_reserved	Not used.
i_1d_layer	The index to the input layer that has created the manhole. For example, an i_1d_layer value of 2 would be the 2nd input layer (1d_nwk_EG15_004_P). Read GIS Network == 1d_nwk_EG15_001_L Read GIS Network == 1d_nwk_EG15_004_P Read GIS Manhole == 1d_mh_EG15_004_P Read GIS Network == 1d_nwk_EG15_001_L
No_Inlet_Culverts	The number of incoming culverts based on the digitised direction.
No_Outlet_Culverts	The number of outgoing culverts based on the digitised direction.
Highest_Soffit	The elevation of the highest soffit (obvert) for the connected channels.
Surface_Area	The surface area of the manhole.

Up
TUFLOW Check Files