5.3      EXPERT ADVICE

Expert advice should be sought for predictions, which are inherently non-numeric and is particularly suitable for estimating social and cultural impacts. It shall be. preferably taken in the form of a consensus of expert opinion for example, it is necessary to find out whether there is impact on wetland or not. The reduction in the wetland productivity may result in to the fall of sugarcane crop yield. As a consequence the quantity of bagasse required for producing cogeneration shall be severally affected. In case of low crushing during the production of crystal sugar may also had to non-availability of bagasse, which may hamper production of power. In order to mitigate these problems it is very much necessary to continuously monitor the production of sugarcane. It is also necessary to make available the other type of biomass for producing power with the use of boiler.

5.4      ECONOMIC TECHNIQUE

Economic Techniques have been developed tries to value environment and is continuing environmental economics. The most commonly used methods of project appraisal cost of benefit and cost effective analysis. It has been found easy to incorporate environmental impacts into traditional cost benefit analysis principally because of the difficulties in quantifying and valuing environmental effects. An environmental impact assessment can provide information on the expected   effects   and   quantify,   to   some   extent  their   importance.   Cost effectiveness analysis can also be used to determine what is most efficient, least cost method of meeting given environmental objectives, with costs including forgone environmental benefits. The attempts have been made and the two most useful methods for cogeneration power projects are "Effect on Production (EOP) and preventive Expenditure and Replacement Cost" (PE/RC). The EOP method attempts to  represent the value  of change  in output that results of the environmental impact. This method is very easy to carry out and easily understood. For example the assessment of reduce bagasse for power reduction in production due to non-availability of sugarcane due to hydrological changes. The PE /RC method makes assessment of the value that people place on preserving their environment by. estimating what they are prepare to pay to prevent its degradation (preventive expenditure) or to restore its original state after it has been damage (replacement cost).