Alijan Abkar; hamzeh saeediyan
Abstract
The use of people in the implementation of natural resource schemes ensures the success of these schemes and can be very useful for the natural resources available in watersheds and stakeholders. In this study, the number of cooperative companies, rural development committee, micro funds and rural funds ...
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The use of people in the implementation of natural resource schemes ensures the success of these schemes and can be very useful for the natural resources available in watersheds and stakeholders. In this study, the number of cooperative companies, rural development committee, micro funds and rural funds in the whole watershed of Yazdanabad was obtained. Then, identification of different village’s distribution in Yazdanabad watershed was done and the activities implemented in them were investigated. Then, the meetings held by PRA method in the villages of Yazdanabad watershed were studied and the comparison of NGOs before and after implementation of the comprehensive natural resources management plan was carried out and analyzed. The results showed that there are 3 cooperative companies and 4 rural funds in Yazdanabad watershed and 16 development committees are active in this area, almost every village has a development committee and there are also 2 micro funds in Yazdanabad watershed. Moreover, the results of the research showed that the most executive activities in all villages located in Yazdanabad watershed were the formation of rural development committee and holding meetings with natural resources laws and regulations.
hamzeh saeediyan; Hamidreza Moradi
Abstract
By determining the threshold of runoff and erosion by rain simulator, it can be determined rainfall amount that causes runoff in different conditions with more speed and accuracy and lower cost. After determining the threshold of runoff and erosion in each region, using biological methods and operations ...
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By determining the threshold of runoff and erosion by rain simulator, it can be determined rainfall amount that causes runoff in different conditions with more speed and accuracy and lower cost. After determining the threshold of runoff and erosion in each region, using biological methods and operations can prevent the conversion of runoff to flood. In this research, considering that the threshold of runoff and erosion occurs simultaneously and mistakenly only the term of runoff threshold is used in different researches and do care less about erosion threshold and in order to determine the most important factors affecting the simultaneous threshold of runoff and erosion of different land uses of Aghajari and Gachsaran formations, part of Margha and Kuhe Gach watersheds of Izeh city with an area of 1609 and 1202 Hectare selected. This study was conducted to determine the relationship between runoff and erosion threshold using a rain simulator with some soil physical and chemical properties such as very fine sand percentage, sand, clay, silt, pH, electrical conductance, moisture, calcium carbonate and organic matter in different land uses of Aghajari and Gachsaran formations. Then, sampling was done at 13 points and with three replicates in Aghajari and Gachsaran formations at different rainfall intensities of 0.75, 1, and 1.25 mm/min in 3 land uses of rangeland, residential area, and agricultural land using a rain simulator. SPSS and EXCEL soft wares were used for statistical analysis. The most important factors affecting runoff and erosion threshold were identified by multivariate regression. In general, in Gachsaran formation in all three land uses, clay and calcium carbonate showed the highest role in increasing the threshold of runoff and erosion. The most roles in reducing runoff and erosion threshold showed very fine sand and moisture content in Gachsaran Formation. However, in the Aghajari Formation, in all three land uses, the highest role in increasing the threshold of runoff and erosion, showed clay and organic matter. In addition, the most roles in reducing the threshold of runoff and erosion in the Aghajari formation showed very fine sand and soil sand and salinity.
