20 20 620 320 1 7 14 1
                 Description of the problem

     Suppose you were to live in the vicinity of Lotov  Lake  and
it  is  up  to  you to find a reasonable solution to the conflict
between   increasing   grain-crops   production   and    reducing
environmental damage  to  a  minimum.  This  means  deciding what
amount of water flow will be allowed through  the  dam  and  what
amount   of   water  and  fertilizer  will  be  applied  in  both
agricultural zones.
     The application  of water and fertilizer is described in our
game on the  basis  of  the  wide-spread  concept  of  technology
suggested by  Nobel prize winner Tjalling Koopmans. The values in
the following tables are based on this concept of technology. The
values are obtained in the following way:
If for one acre of farm land 240 cubic meters  of  water  and  40
kilograms of  fertilizer  result  in  a  harvest  of  2.4 tons of
grain-crops, then we assume that for 10 acres of  farm  land  the
application of  water  and  fertilizers will be 10 times greater.
This technology is described  in  a  column  showing  inputs  and
output for one acre.  It looks like this.
           Production    2.4
           Water input   240
           Fertilizer     40

But there  are  also side consequences of the application such as
pollution output,  and these side effects must be included in the
table of values as well. In our example we have to know  that for
240 cubic meters of water input there  will be 48 cubic meters of
withdrawal  and  for 40 kg  of fertilizer  there  will be 6 kg of
pollutants. Our technology parameters now look like this:
           Production    2.4
           Water input   240
           Fertilizer     40
           Withdrawals    48
           Pollution       6

Research has shown that  there  are  nine  possible  technologies
which could be implemented.  Now we are able to construct a table
using the information above reflecting the relationship to  these
nine technologies. The following is the table for the UPPER zone:

                  Technologies for the upper agricultural zone
Technology no.   1     2     3     4     5     6     7     8     9
Production     0.6   1.2   1.6   2.0   2.4   1.4   3.2   3.6   4.4
Water input      0   120   240   120   240   120   240   240   360
Fertilizer       0     0     0    40    40    80    80   120   120
Withdrawals      0    24    48    24    48    24    48    48    72
Pollution        0     0     0     6     6    12    12    18    18
#
The parameters are always given for 1 acre in the following units
of measure:
  - grain-crops production in thousands of kilograms,
  - water application for irrigation in cubic meters,
  - application of chemical fertilizers in cubic meters,
  - irrigation withdrawals in cubic meters,
  - pollution level in withdrawal water in kilograms.
A quick  glance at the table shows us that technology  no.1  uses
neither irrigation nor fertilizers.  There is no  pollution,  but
low productivity.  Technologies  no.2  and  no.3  use irrigation,
but no  fertilizers.  The   remaining   technologies   use   both
irrigation and fertilizers. The technology leading to the highest
productivity is no.9.  But technology   no.9 is the one which can
damage the   environment  to  its  maximal  extent,  since  water
consumption and pollution output are very high.
#
The parameters for the LOWER zone are given in the table below.

                  Technologies for the lower agricultural zone
Technology no.   1     2     3     4     5     6     7     8     9
Production     0.6   1.2   1.4   2.0   2.2   2.4   3.2   3.4   4.0
Water input      0   120   240   120   240   120   240   240   360
Fertilizer       0     0     0    40    40    80    80   120   120
Withdrawals      0    24    48    24    48    24    48    48    72
Pollution        0     0     0     6     6    12    12    18    18



If you compare tables the parameters are slightly different,  and
actually the grain production is slightly less in the lower zone.
#
In playing  this  game  it is supposed that you are interested in
three performance indices (criteria of choice):
 - total grain-crops production;
 - drop  of  the  water  level  in  Lotov  Lake by the end of the
   irrigation period;
 - pollution  concentration  in  the  Lotov  Lake  by  the end of
   irrigation period.
     You must also know that the drop of the water level in Lotov
Lake  more than 2 feet will result in damage  to  the  ecological
system and recreational opportunities of the Lotov Lake. The drop
of  more  than  5 feet may result  in  non-reversible  ecological
changes.  A further increment of the drop results in more  severe
damage.  It  is  advisable that the concentration of pollution in
Lotov Lake (i.e.  concentration of pollution in  drinking  water)
will  not  exceed  about  5  mg/l.  Certainly  it is desirable to
decrease the concentration of pollution.  But by how much ? It is
now time for you to decide.  You will be scored on your decision.
#


Your score reflects how well you  understood  the  environmental 
problem presented here.  10 is a perfect score.  3 or below: you 
should be run out of town on a rail, tarred  and  feathered,  or 
both.  That assumes you have not yet died from the pollutants in 
the drinking water, which a score of 3 or below would indicate.
