On Guanzhong Region Cited Hong Warping

Muddy water irrigation, is our country's oldest agricultural muddy irrigation technology. It is carried out extensively in the northern arid and semi-arid areas where water and soil has lost a lot. By muddy irrigation and comprehensive utilization of water, soil and fertilizer, product increases very obviously, effectively promote the development of agricultural production, making this technology welcomed by the masses. After New China was founded, Muddy water irrigation, in theory and practice has achieved a great development and improvement. With the necessity of construction, this work should be taken seriously in water and soil conservation work. First of all, it is closely related to the improvement of the ecological environment and comprehensive management of watersheds in soil erosion areas, it is an important means of land improvement. Secondly, it will expand the water source, then ease the summer drought and water shortage resulting from the "extremely drought," and the soil can be improved through creating farmland on a large scale, thus expanding the area of basic farmland. Thirdly, it can block and use substantial lost soil and water, also reduce the river flood peak and sediment concentration, thereby reducing river siltation, in order to cure the Yellow River, Haihe River and other sand rivers.Through the study of Muddy water irrigation, in Luohui Irrigation Area and Zhaolaoyu District, the thesis analyzed the types, economic benefits and social benefits of the Muddy water irrigation, summarized the respective characters and the achievements that Luohui Irrigation Area gained in improving the sediment concentration and utilizing cleaning-mud balance principles to realize transportation distantly. The author analyzed the common problems existing at present according to the two places' experience, asserted some measures for reference and prospected the foreground of this technology.The thesis can be divided into two parts. The first is the preface and the second is the main part. Conclusions are the following in the paper:1. Muddy water irrigation is an effective measure by comprehensively using water and sediment resources. The use of the technology and promotion is necessary and promising.2.The characteristics must be mastered as well as using of resources of water and sediment. Doing like this to achieve the original intention, otherwise it is just the opposite.The management is very important during the course of specific operations. The whole co-ordination arrangements should be well done, or come to naught.3.Warping soil sediment concentration the better the general requirements, but in order to ensure the formation of sediment loading, the general use of door more than diversion, construction of diversion facilities, low water to high water vent, after first moving static cited silt, Finally, sedimentation flow backward through this repeatedly, to meet the purpose . Muddy water irrigation according to the characteristics of different crops and growing the same crop in different characteristics of the selection of appropriate sediment.4.High sediment transport water to the different requirements of channels and low water flows, and irrigation channels in China are low by the water or sediment-laden flow characteristics of the design.Therefore, in practice, the design of channel flow and want to consider General slope, the largest water diversion channel at all levels of sediment, but also based on channel slope may be more than water down a big sand channels can be properly limited to improve, or reduce the number of. Generally the end of the branch head of a small, but use the high sediment concentration flow, the end of the level of the water diversion channel to reduce the sediment concentration is in order to prevent siltation. U-shaped or trapezoidal channel of most conducive to high muddy water sediment transport. Drainage and irrigation canal system should be matched, and maintain the drainage flow. Hyperconcentrated want timely delivery of water dredging, and water at the same time, through manual or mechanical disturbance of the way to achieve smooth flow of water.5.Zhaolaoyu District is the use of mountain torrents to Increase soil fertility.For no gates, no gravity-type dam to use of flood. Diversion dike extension to the upper reaches of the expansion point of view, generally 10-20 degrees for the better. And the diversion dike of the cross-sectional specifications decide on the internal embankment is the diversion of water from above the water depth.