whether farmers are willing to financial participation for reducing the adverse environmental effects of contaminated water? (a case study of kashaf- rood basin in mashhad)

the purpose of this study is to evaluate financial participation of farmers to reduce the adverse environmental effects of contaminated water by using contingent valuation approach and tobit model by heckman's two stage. to achieve the desired goal, 100 questionnaires collected by a random sampling from farmers of kashaf- rood basin in mashhad city in 2014. results showed that variables of age, index 3 (farmers agree with rural and urban sewage inflow into kashaf-rood river), total amount annual consumption of chemical pesticides and variables of sex, total area under cultivation, index1 (farmers agree with benefits of preventing soil washing), index 4 (farmers agree with well being of available soil and water) and index 5 (farmers agree with investments to protect the soil and water), experience in the use of soil and water conservation practices have a significant and positive and negative impact on farmers' decisions to participate in financial for reducing the adverse environment a effects of contaminated water, respectively. also, variables of age, type of agricultural activity, under cultivation crops,total amount annual consumption of fertilizer per year, total amount annual consumption of chemical pesticides, index 3 (farmers agree with rural and urban sewage inflow into kashaf-rood river) and variables of net savings of agriculture, land ownership status, experience in the use of soil and water conservation practices, total area under cultivation, index 4 (farmers agree with well being of available soil and water), sex have a significant and positive and negative impact on the amount of farmers financial participation for reducing the adverse environmental effects of contaminated water, respectively. also study results showed that average of maximum amount farmers financial participation for reducing the adverse environmental effects of contaminated water per hectare in the five scenarios to be 134500, 179500, 225500, 271000and354500 rials, respectively. according to the study results,suggestions is presented for reducing the adverse environmental impacts of contaminated water.