Ali Jafari; Aliakbar Nazari Samani; Fatemeh Tavakolirad
Abstract
Doing the research for monitoring, evaluating and comparing the results with the parameters of projects is essential in the most natural resources and watershed management projects. Also in flood spreading projects the measurement, processing and evaluating the obtained information seems necessary. ...
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Doing the research for monitoring, evaluating and comparing the results with the parameters of projects is essential in the most natural resources and watershed management projects. Also in flood spreading projects the measurement, processing and evaluating the obtained information seems necessary. Entrance the large amount of flood with suspended material and sedimentation, changes the soil properties gradually. In this study influence of flood spreading on soil mineralogy changes was evaluated after 10 years. In order to investigate the changes in flood spreading ditches, three rows between the spreading channels which had received the flood were chosen as the sampling sites. To investigate and identify the clay minerals of flood spreading area and compared with the control area near to flood spreading area, thirteen samples of 0-15cm soil horizon from three flood spreading rows and settling ditches were selected. The results obtained from X-ray diffraction curves showed the presence of palygorskite, Illite, chlorite, smectite and kaolinite in control area, three settling ditches and flood spreading rows. There was no difference between the types of clay minerals in control area with settling ditches and flood spreading rows but the amount of some clay minerals was different in these situations. It seems that the dry climate of region was the serious factor in no change of clay minerals. Flood spreading had little effect on types of clay minerals and just was able to change the amount of clay minerals in flood spreading rows.
Ali Jafari; Fatemeh Tavakoli rad
Abstract
Flood spreading has an effective role in the soil improvement and fertility, ground water storage, revival of vegetation and prevention of fluent sands movement. One of the main problem of flood spreading projects is the entrance of sediment to the spreading systems and sedimentation in it. Sediment ...
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Flood spreading has an effective role in the soil improvement and fertility, ground water storage, revival of vegetation and prevention of fluent sands movement. One of the main problem of flood spreading projects is the entrance of sediment to the spreading systems and sedimentation in it. Sediment reduces the efficiency of the flood spreading system and after awhile lose its efficiency.The main aim of this research is the investigation of infiltrate changes trend under effect of flood spreading in Tangestan flood spreading station (Bushehr province). In this research, soil surface infiltration in spreading and control area were measured with double rings method. For investigating of these changes the intervals between flood spreadng channels, the first, second and third rows were selected. Data were analyzed by Kruskal-Wallis test. Due to the significant level of this test, less than 0.01, can be expressed that between the infiltration of flood spreading rows and control area were significant difference.
