Research On Optimal Option For Returning Sediment In Sand-basin To Field In Weishan Irrigation District Of Yellow River

The Yellow River Irrigation Manage District of Liaocheng Weishan has created tremendous economic and social benefits for the development of LiaoCheng City. However, negative results caused by the Yellow River sediment is also great, such as the Yellow River dredging issue, the desertification problems, the decrease of cultivated land and so on. Forced the authorities to carry out the comprehensive management of Yellow River irrigation sediment, the scientific and sustainable use of settling pool, the environmental restoration of settling basin and the research of sustainable economic development.In this paper, on the basis study of the settling basin opening, use, follow-up of silt is also cultivated in Weishan Irrigation District for the calendar year, combined with the actual situation in Weishan Irrigation District to carry out the following studies:(1) Weishan Irrigation Area on the profile of the investigation, analysis of the irrigation area of physical geography profiles, socio-economic survey and land and water resources profile, understand Weishan Irrigation District Settling Basin planning and overall vision, summed up over the years in Weishan Irrigation District Settling Basin Silt also cover farming conditions.(2) According to the above, bring forward the optimal design of mathematical models for settling basin's drainage layout, use, follow-up of silt is also cultivated in upland. The optimal design is the premise to import a certain amount of water to meet irrigation and a settling volume of settling basin, settling basin's drainage layout, use, follow-up of silt is also cultivated in upland for decision-making variables, the lowest annual cost of settling basin drainage, drains the longest life of settling basin drainage and the best benefit of the settling basin drainage for the optimize objective function, according to the system composition and the use of the characteristic to develope the optimal design of mathematical models. Brief introduction the establishment and application of the optimal design evaluation elements, and carry out case analysis for the application of system optimization design.(3) Carry out a cursory research of supporting technologies of the optimization model, including the optimization settings technology of settling basin embankment across, the optimization model of settling basin dredging and upland excavation to build a filling, and the study of the save-energy technology of excavation and filling soil. Through research of the supporting technologies, enabling optimization model to obtain the optimal objective function, truly achieve the optimization of settling basin dredging use and the high ground build.(4) Carry out the analysis of economic and social benefits for follow-up of silt is also cultivated, while about the relevant supporting technologies, such as settling basin, the use of mechanization dredging, and advantage of the silt resources to develop material processing industry-benefit analysis. The treatment of the settling basin cover to 2.07 million mu of cultivated transformate to people, reduce the settling area of 0.42 hectares, significantly reduced the conflicts demand of the farmers for land, and fundamentally improved the mass production, living and ecological environmental conditions, greatly narrowing the gap with the irrigated area of economic development, getting the high social benefits.