Sayed Naeim Emami; Hamidreza Peyrowan
Abstract
Marls are one of the main causes of sediment production and subsequent soil erosion in watersheds. Researchs shows that there is a close relationship between the rate of marls sediment yield and their physical and chemical characteristics. With the aim of determining the expansion of marly formations ...
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Marls are one of the main causes of sediment production and subsequent soil erosion in watersheds. Researchs shows that there is a close relationship between the rate of marls sediment yield and their physical and chemical characteristics. With the aim of determining the expansion of marly formations and a quantitative assessment of the mentioned indices role on the sediment yield of marls in Chaharmahal and Bakhtiari Province, a comprehensive study was conducted and its outstanding results are presented in this study. After identifying and separating the marly formations in Chaharmahal and Bakhtiari Province and performing systematic sampling, necessary physical and chemical experiments were performed and the results were analyzed using statistical methods. Then, using a rainfall simulator, the sediment production rate of each marly stratigraphic units was measured in the field. Results showed that about 1073.95 Km2 (equal to 6.5%) of province rocks has devoted to marly lithological units. On the basis of analyses, Razak, Pabdeh, Hormoz, Mishan and Gurpi formations with mean of 96.34, 94.41, 87.1, 76.17 and 33 grm-2 are the most sensitive marly formations, respectively. Sediment yield is directly related to silt amounts, total lime, active lime, exchangable sodium and reverse related to clay amounts. The presence of Kaolinite and Illite clay minerals is one of the intensifying factors in sedimen yeild in marly formations.
Shahbaz Shamsoddini; Sayed Naeim Emami; Solaiman Bahmani
Abstract
Chaharmahal and Bakhtiari Province with one percent of total area in Iran, covers 10 percent of total precipitation. Also, Karoon and Zayandehrood rivers are originated from this province. In recent years, the different watershed operations have been performed to control and maintain surface water in ...
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Chaharmahal and Bakhtiari Province with one percent of total area in Iran, covers 10 percent of total precipitation. Also, Karoon and Zayandehrood rivers are originated from this province. In recent years, the different watershed operations have been performed to control and maintain surface water in the province. This research analyzed effective factors on rural participation in watershed management operations in Monj-Bideleh Basin of Lordegan in Chaharmahal and Bakhtiari Province. Required data were compiled with questionnaire and analyzed with descriptive and inferential statistics in SPSS. The results showed that relationship between age, main gob and experience in agriculture with participation is negative and insignificant. In contrast, the relationship between satisfaction, social versatility, socio-economic situation, membership in public institutes and village, and use of informational resources with participation is positive and significant in one percent. The results of multiple regression estimation in stepwise indicate that knowledge of the objectives and characteristics of the watershed management plan has the highest portion in participation in watershed management activities.
