Order of the task execution

To call an applied task «Forecasting of a zone of emergency flood of petroleum».

  To choose on a map a linear object - an petroleum pipeline.

  To specify on a map in area of the chosen object a point of break.

  Correctly to fill parameters of calculation of volumes of the  flowed petroleum on page «Volume of flowed petroleum».

- Code of pump station (PS). At absence of the specified objects on the pipeline as PS1 the first point of the metrics, and as PS2 last point of the metrics of the pipeline will be chosen.

- A code of gates. At absence of the specified objects on the pipeline as gate 1 the first point of the metrics, and as gate 2 the last point of the metrics of the pipeline will be chosen. The gate should be located between PS1 and PS2.

- Numerical values of parameters of building are automatically initialized by values of a control example. Then, its are read out from semantics of a map (if its are found then will be replaced onto new). Then in dialog it is possible to make changes into the given fields.

At prompting onto a cell for data input from semantics of map objects, in the bottom line of the program or in the form of the pop-up help (depends on Windows version)  the detailed help about value of parameter will be shown and its designation according to a method.

  What has influence on calculation of volume of the flowed petroleum. The greatest influence do:

- area of an aperture.

- interval of time between failure and switching-off of pumps

- without pressure (pumps do not work) essential value renders a relief of land.

  When all parameters are entered it is necessary to press the button «Calculate volume>>». Calculation of volumes and automatic transition to page «Zone of a spread» is made.

  Modelling a spread is made under the law of communicating vessels. The volume of petroleum flowing on a surface gradually decreases, due to filling pits, an absorption into ground and delay on integumentary vegetation.

  What has influence on calculation of construction of a leak zone:

- Height of a wave of a stream of leaking petroleum (m). Defines height of small obstacles which are overcome by a stream. At construction of a zone, the more this value, the bigger "hills" a stream can flow.

- Thickness of a film of the petroleum remaining after a leaking (m). Defines volume of the petroleum, remaining on one square meter of a surface of ground after a leaking of petroleum.

- The size of an elementary analyzed site of district in which limits the conditions of a leaking are considered constant. Factually it is a step of a matrix of qualities which is created for modelling a zone of a leak.

- If a matrix of heights is "rough" (there are significant sites with equal heights) the result of modelling can be "unexpected". It is considered, that «on smooth» the liquid will flow by a thin jet, or by several jets (more often horizontal or vertical lines) until lower place will not be found. To correct a situation it is possible only by QUALITATIVE MATRIX of HEIGHTS (see item 1).

  Order of modelling of a leak zone.

The program at first builds a matrix of qualities with step specified in dialog. Then construction of the area object describing all district filled by petroleum is carried out. The more the volume of the flowed petroleum, the longer the creating a matrix of the qualities describing a zone is carried out.

During construction of a matrix of qualities, on some operational systems the data on percent of an execution do not shown. DO NOT INTERRUPT WORK of the PROGRAM!!! Wait the terminations of process.