This file contains information about point sources. It may hold constant point sources' concentrations and discharges or, for time series of point sources, instead identification to find these in the time series files (PSTIMESeries.txt). These two types may not be mixed, which one to use is set in info.txt.

HYPE allows to separate eight types of point sources, e.g. wastewater treatment plants, industries, and urban stormwater. Conceptually, all eight are treated the same by HYPE (see description), but HYPE will separate them in the annual load result files if these are requested in output options of info.txt. Point source loads are added to main rivers as a constant flux.

Tracers (substance T1) can be added as point sources to the main river with the method above. An alternative use of point sources for tracers is possible though. Tracers can be added to the local river, internal lake, main river or outlet lake. These point sources are not separated into different types of point sources (they are signified by using type zero). These point sources can not be used together with info.txt output options printload or printwaterbal.

The point sources file can also be used for water abstraction sinks. If point source discharges volume are set to values < 0, or the point source type (ps_type) is set to minus 1, the point source is interpreted as an abstraction instead. Abstraction can be made from the main river, the outlet lake or the aquifer below the subbasin. There can be only one abstraction from each subbasin (if several the last read will be used).

PointSourceData.txt is a tab-separated file located in the modeldir folder. Point sources are listed row-wise, multiple point sources for each sub-basin are allowed (but not multiple abstractions). The first row contains a column header with variable names. Variable names are not case-sensitive (max. 10 characters, no spaces). Columns with headings unknown to HYPE are skipped while reading the file, but are not allowed to be longer than ten characters. Columns containing character strings, e.g. descriptive meta-data, must not exceed a length of 100 characters. The columns may be in any order. A value must exist for every column and row, i.e. empty cells are not allowed.

The table below describes all PointSourceData.txt columns read by HYPE. The general unit (U) is used in tables of parameters and input data where the unit is not defined.

Examples of use of PointSourceData.txt and of the file structure:

First example: first row: a constant point source of type 1, e.g. waste water, with nutrients; second row: a larger constant point source of type 2, e.g. industrial effluents; third row: abstraction of water from outlet lake.

subid ps_type ps_vol ps_tpconc ps_tnconc ps_spfrac ps_infraq ps_source
456   1       10     0.5       40        0.3       0.9       0
765   2       2301   2         100       0.3       0.9       0
4050  -1      -100   0         0         0         0         2

Second example: A constant point source of nitrogen and T2 increased 10-fold from March 21 2004.

subid ps_type ps_vol ps_tnconc ps_infraq ps_t2 fromdate   todate
456   1       10     40        0.7       4     1990-01-01 2004-03-20
456   1       100    40        0.7       4     2004-03-21 0

Third example: A general tracer point source to local lake at 1999-08-05.

subid ps_type ps_source ps_vol ps_t1 fromdate   todate
456   0       2         10     4     1999-08-05 1999-08-05

Fourth example, time series point source: first row: a waste water point source, second row an abstraction from the main river and its inflow.

subid psid ps_type ps_source
567   1    1       3
668   2    -1      3