جستجوی مقالات مرتبط با کلیدواژه « استان گیلان » در نشریات گروه « منابع طبیعی »

Management The last decade of the twentieth century has come to an end while human society has been heavily involved in environmental problems and its dangers. One of the most important environmental challenges of the last two decades is the loss of the country's rangelands. Rangelands are important because they constitute an important part of renewable resources and still depend on the lives of a significant number of humans and animals. The statistical population of this study is rangeland owners in Guilan province. The total number of rangelands in Guilan province that have rangeland management plans is equal to 6 rangelands. The sample is equal to 5 rangeland owners. The data collection tool in this research is a questionnaire and to test the research hypotheses, confirmatory factor analysis and structural equation modeling with partial least squares approach have been used. The result of the research indicates the positive and significant effect of economic, social, psychological, attitudinal and educational factors on the participation of rangeland owners in the implementation of rangeland management projects. Also, the effect of ranchers 'participation in the implementation of rangeland management projects on rangeland health, increasing livestock production and farmers' satisfaction was positive and significant. Livestock and rangeland balance is one of the most important factors in the destruction of rangelands in Guilan, and until this issue is resolved, all efforts and measures to manage, improve and rehabilitate rangelands are useless or very ineffective.

Cultivation of the strategic crop of rice highly depends to the existence of sufficient and guaranteed irrigation water، and water shortage stresses have irreparable effects on yield and quality of productions. Decrease of the Sefidrud river inflow in Guilan province which is the main source of supplying irrigation water for 171 thousand hectares under rice cropping area of this province، has been challenged sufficient and guaranteed irrigation water supply in many regions of mentioned province. Hence، in present study estimating the value that paddy farmers place on sufficient and guaranteed irrigation water supply has been considered. Economic valuation of sufficient and guaranteed irrigation water supply improves water resource management policies in demand side. Requested data set were obtained on the base of a survey and are collected from 224 paddy farms in rural regions that faced with irrigation water shortages. Then، using open-ended valuation approach and estimation of Tobit model via ML and two stages Heckman approach، eliciting paddy farmers'' willingness to pay for sufficient and guaranteed irrigation water supply has been accomplished. Results revealed that farmers in investigated regions willing to pay 26. 49 percent more than present costs of providing irrigation water in order to have sufficient and guaranteed irrigation water.