Node Concentration

Overview:

Node concentration represents the concentration of constituents attached to boundary inflows and sources.

Tables:

NODE_CONCENTRATION

The NODE_CONCENTRATION table attaches concentrations to boundary and source flows defined in HYDRO. The table also assigns a time series to the source.

Field Descriptions

NAME

Name assigned to the source. An entry here must have the same name as an entry in the BOUNDARY_STAGE, BOUNDARY_FLOW or SOURCE_FLOW tables -- by matching names you will attach concentrations to the flow.

NODE_NO

Node number where the flow is applied. This must match the node number given in the original flow table (it is a bit redundant, but easier to look things up).

VARIABLE

Constituent name. If no output is requested for the constituent currently it will be ignored.

FILLIN

Method for filling in data if the time step of the assigned series is coarser than the time step of the model.

FILE

DSS or text file in which data are stored. Use consistent case when referring to the same file. You may also enter the word constant if you would like to assign a constant value to the input (the value will be entered in the next column).

PATH

The path within the text or DSS file of the time series data. If you used the constant keyword in the Input File column, enter the value (e.g. 4.22) here.

Table Info

Identifier:

NAME

Include Block:

QUAL_TIME_SERIES

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Multiple sources and sinks can be assigned to a node. They are often kept separate in order to assign different concentrations to them