Design Of Low-Pressure Pipeline Irrigation In Small Electrical And Mechanical Irrigation Area Of Rice-wheat Rotation In Jiangsu Province

With the rapid development of China's social economy,irrigation and water conservancy plays an increasingly important role in food security,economic development and ecological security.It has become an important factor affecting the long-term stability of the country.Water-saving irrigation,as a major strategic measure in the development of irrigation and water conservancy,has been highly valued by the country.In recent years,as one of the effective measures to realize water-saving irrigation,low-pressure pipeline irrigation has developed rapidly in China,but also exposed many problems.Aiming at the main problems existing in the development of low-pressure pipeline irrigation in rice-wheat rotation area of Jiangsu Province,the following aspects were emphatically carried out in this paper:(1)Design of low-pressure pipeline irrigation systemIn view of the problems in the development of low-pressure pipeline irrigation in rice-wheat rotation area of Jiangsu Province,such as unstable irrigation,low water yield,failure of rice to soak in the field in time,and large increase of electric charge,the main causes of the problems are analyzed based on typical cases.Based on the typical layout patterns of field projects in different areas of Jiangsu Province,the development countermeasures of low-pressure pipeline irrigation in Jiangsu Province are put forward.On the basis of determining the parameters of low-pressure pipeline irrigation design standard,irrigation area division,irrigation modulus,wheel irrigation work system,irrigation height difference,pump type selection in rice-wheat rotation area,and so on.Aiming at the layout of "Feng" and "E" type of pipeline network,the design results of the specific pump type and low-pressure pipeline diameter for different pump types are obtained,which can provide reference for practical engineering construction.(2)Development of inquiry system for low-pressure pipeline irrigationBased on the above mentioned design results of water pump type and low pressure pipe diameter,taking the relational database software Visual FoxPro9.0 as the main development platform,this paper developed the corresponding auxiliary query system by applying the object-oriented programming method and combining the actual production needs.The system has basic functions such as interface wizard,information query,data maintenance,system exit,etc.The system includes interface wizard,information query,data maintenance,system exit and other basic functions,which has a certain practical and engineering significance.