3.44 Intensive Residential and Urban Sectors 



Interactions between objective function and river flow substantially influenced 

 water procurement and waste-water treatment called for by the solutions 

 obtained. 



High flow: Resource allocation was the same when net benefits (REVOWAT) 

 were maximized and public and private costs (SOCCOST) minimized. When 

 gross benefits (PRITOT) were maximized, urban water procurement and 

 waste water-treatment differed from their allocations under the other two 

 objectives optimized. 



Median flow: For the urban sector, either water procurement source or 

 waste-water treatment process differed among objectives optimized. In 

 the intensive residential area, maximized net benefits (REVOWAT) 

 resulted in a waste-water treatment process different from the other two 

 objectives. 



Low flow: Only one similarity in resource allocation was found among the 

 three objectives optimized. This was waste-water treatment in urban 

 sector. 



For maximized net benefits (REVOWAT) and gross benefits (PRITOT), 

 intensive residential and urban water supply sources were taken from the 

 river instead of from the less expensive ground sources. The reason for this was 

 that removal and use of river water along with subsequent treatment of waste 

 water was a low-cost method of improving river-water quality. 



3.45 Industrial Sector 



The double influence of goal-optimized and river-flow level was greatest in 

 the industrial sector. At all river-flow levels the results of minimizing public 

 and private cost (SOCCOST) were substantially different from the results ob- 

 tained from the other two goals optimized. The level of industrial output was 

 lower, with one exception, and old technology was used in the paper and 

 tanning industries. When net benefits (REVOWAT) were maximized, production 

 and technology used in the three industries were about the same as when gross 

 benefits (PRITOT) were maximized. In these solutions production was unaf- 

 fected by river flow, except in the tanning industry in low -flow years. One 

 similarity among the three goals was identified. With only one exception, the 

 solutions called for public waste-water treatment at one or more of the river- 

 flow levels. This indicates an economic reason for coordinating effort between 

 community and industry in waste-water treatment. 



High-river flow: Wool production at high-river flow was the same for the 

 three goals optimized. Aside from similarities mentioned above, no other 

 results were the same. 



Median-river flow: Public treatment of waste water from the paper industry 

 was common to results for maximized net benefits (REVOWAT) and for 

 maximized gross benefits (PRITOT). Public treatment of waste water 

 from the tanning industry was common to results for maximizing net 

 benefits (RE VO WAT) and minimizing public and private costs (SOCCOST). 



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