جستجوی مقالات مرتبط با کلیدواژه « validity » در نشریات گروه « آبخیزداری، بیابان، محیط زیست، مرتع »

Evaluating the implemented watershed projects and providing a perspective of their performance results provide managers and decision-makers with appropriate information for long-term planning. Therefore, by evaluating the performance of watershed projects from the perspective of experts, while determining the effects of the project and the factors affecting, the necessary guidelines for the optimal implementation of these projects in the future can be provided to officials and planners. In this research, in order to evaluate the implemented watershed management projects in terms of improving the spirit of public participation in the Rimeleh Watershed, the point of view of experts and users was used.

Rimleh Watershed is one of the sub-basins of Kashkan River. For this purpose, after preparing the initial list of indicators, using the Delphi method and polling experts, the final list of indicators effective in improving the spirit of public participation was determined. 39 indicators were selected and classified into 6 categories. Finally, in order to prioritize the indicators, multi-indicator decision-making methods were used. All heads of rural households in this watershed were selected as the statistical population. The validity and reliability of the questionnaires were tested. According to Cochran's relationship and proportional assignment sampling method, 135 watershed dwellers were referred from the watershed dweller community. Face-to-face interviews and questionnaires were used to collect users' opinions. Friedman's test was used to rank the factors affecting people's participation from the point of view of beneficiaries. In order to evaluate from the point of view of experts, a pairwise comparison questionnaire was designed and distributed using the Analytic Hierarchy Process (AHP) method.

Cronbach's alpha was calculated equal to 0.827 and showed the reliability of the questionnaires in the research. The compatibility rate in hierarchical analysis is less than 0.01, so the compatibility of the comparisons can be accepted. The results show that the activities of cooperative actions such as gardening, terracing, construction of concrete streams, construction of swimming pools and dredging of fountains took the most human and financial participation (about 76%). Examining indicators of participation of watershed residents in future projects showed that "increasing the level of income due to the implementation of the project in the region" (ranked 19.5) was chosen as the best indicator from the users' point of view. According to experts, the index "participation rate of watershed residents in decision-making" (with a weighted average of 0.252) was selected as the best index. The indicators of "increasing the participation of watershed residents in decision-making" and "using the capacity of other institutions in the implementation of conservation projects and attracting their participation" received the most weight, and the indicator "strengthening the participation of organizations such as cooperatives at the village level" received the least weight.

The results of this research show that the beneficiaries of Rimeleh Watershed have a high capacity to accept and participate in watershed management projects. It is suggested that the participation of stakeholders in future decisions and the use of participatory measures in this watershed and other watersheds are of importance. Therefore, the approach used in this research can be used as an effective method to help better understand the watershed system and also facilitate the decision-making process by watershed planners and managers and watershed stockholders. In order to evaluate the implementation of watershed projects on improving the spirit of public participation, it seems necessary to pay attention to the mentioned priorities and it is suggested to be placed on the agenda of managers and planners.

This study examined the attitude of watershed stakeholders to watershed management plans in the Rimleh watershed from the perspective of residents. Rimleh is one of the watersheds of the Kashkan river basin. All heads of rural households in the basin were selected as the statistical population. Practical indicators for measuring the attitude of users towards watershed management measures were prepared from related scientific articles and books. The validity and reliability of the questionnaires were tested (Cronbach's alpha = 0.827). On the basis of the Cochran formula, 135 respondents were chosen in a stratified sampling scheme among the local communities of the watershed. The effects of watershed management measures on economic and social criteria were classified and evaluated using the Friedman test. Among the indicators of improving the economic income level of watershed residents, the index of converting low-yielding meadows into sloping land gardens (rank 16.44) had the highest score. Also, among the indicators of improving the level of knowledge and awareness and economic power of watershed households, the index of proper use of the capacity of other institutions had the highest score (7.9 mean rank). The results of this research can be used by managers and decision-makers to promote soil and water resources protection as well as to promote the adoption of management actions at the watershed scale.

Determining the effectiveness of flood spreading schemes, especially from the point of view of effective economic and social indicators, over a quarter century after their implementation in the country, plays an important role in their assessment. In this study, indicators related to the effects of flood spreading plans on Ab-Barik Aquifer of Bam were identified and then ranked based on nonparametric statistical tests from the experts' point of view. For this purpose, first the indicators related to the effects of flood spreading projects on the aquifer based on library studies, expert inquiries as well as site visits and face-to-face interviews with local residents and users were identified and finally the validity of the questionnaire based on expert opinions was identified. Finally, the validity of the questionnaire based on the experts' opinions and their comments was finally confirmed. Also, the reliability of the measuring instrument was tested by calculating Cronbach's alpha component. In this research, based on the multi-response coding method, the variables of the questionnaire were of the type of qualitative and qualitative variables consistent with the Likert scale, so at this stage, a survey was conducted from 30 experts. The range of changes in mean rank values varies from 4.15 to 22.88. The results of the ranking of indices based on Friedman test showed a significant difference in the effectiveness of the effective variables in evaluating flood spreading projects on aquifer, so that the question of “reducing the damage to flood lands and gardens” with the rank mean of 22.88 and also the question of “conflicting among the villagers in the area” with the rank mean of 4.15 have maximum and minimum priority, respectively. In addition, the results of the study indicate the high effectiveness of flood spreading schemes in the Ab-Barik Aquifer of Bam.

Research on the environmental controllers in plant communities is one of the research fields for many ecologists. Identifying the factors affecting the vegetation cover in the arid regions is the first step to recognize the destructive factors, which inhibit the growth and development of vegetation. In the current study, using the structural equation modeling method and Partial Least Square – Structural Equation Modeling (PLS-SEM), climatic and pedological variables that affecting the vegetation cover in steppe rangelands of Zayandehrood basin of Isfahan province were identified and modeled. According to the results, soil clay content, maximum runoff height on the soil, temperature, and dryness of the environment are the most important variables affecting the quantity and quality of vegetation in the rangelands of the Zayandehrud basin. Besides, the role of climatic factors is more than soil factors in the distribution of vegetation in the region. The model presented in this research has good accuracy and high flexibility for modeling ecological phenomena.

This article describes a research aiming to investigate factors affecting community participation and to predict community acceptance of vegetation-based management scenarios in the Hable-rud River Basin. The Hable-rud River Basin which is a transboundary basin is extended between Tehran and Semnan provinces in Iran. In this research, vegetative management scenarios include: the current condition, terracing, saxaul plantation, riparian restoration, forage growing, bunch seeding, contour furrowing, tree plantation, grazing exclusion, seeding, drill seeding, orchard development, and agroforestry. Through an interview with the stakeholders of the basin, a predefined questionnaire was completed for each respondent separately. Validity and reliability of the questionnaire were tested. On the basis of Cochran formula, 379 respondents were chosen in a stratified sampling scheme among the local communities of the basin. The factors influencing people's participation in various districts of the basin were investigated. The community acceptance level of watershed management actions was quantified using binomial probability distribution. Financial support policies of the government were identified as the most effective factor in community participation for the study area that attained the highest value in the viewpoint of people living in Sorkhe and Ivanakey districts. Community participation was evaluated in four forms including support by heart, labor support, financial support, and labor and financial support. The analysis indicates that scenarios of agroforestry and orchard development have the highest level of labor and financial support. Central Firoozkooh and Central Damavand districts have maximum labor and financial support level. The results of the binomial distribution analysis show that scenarios of agroforestry and orchard development have highest preferences among the local communities of the Hable-rud river basin. The results of this research can be used by managers and decision makers to promote soil and water resources protection as well as to promote the adoption of management actions at the watershed scale.