Research On Economic Pipe Diameter And Economic Velocity Of Rural Water Supply Pipe Network

Rural water supply project is a plan about people’s livelihood,to promote the new rural construction,ensure the harmonious development between urban and rural areas,improve residents’ living standard and has important significance to protect the safety of rural drinking water.China is a large country with a large population and a large agricultural country.At the same time,China is one of the countries with the least water resources per capita,and even ranks among the 13 poor countries in the world.China is a developing country with a large population.It is restricted by natural,geographical,economic and social conditions.Especially in 72% of the total land area ShanQiu District,complex terrain,farmers living scattered,many parts of the lack of water or water difficulties,many areas polluted by hydrological geological condition,and the influence of human activities such as mining groundwater fluorine,arsenic,iron,manganese and other content as well as ammonia,nitrogen,nitrate,indicators such as heavy metal exceeds bid,must undergo purification treatment or looking for water quality can meet drinking water health and safety requirements.The increase of population,the increase of urbanization water standard,the increase of industrial water consumption,water pollution and low water efficiency also make the contradiction between supply and demand of water resources more prominent.Water supply pipe network is the main part of rural water supply project,including the cost of water supply network accounts for about 50% to 70% of the entire water supply project total investment,even to 80%,while water supply pipe network project for rural water users of water quality,water quantity,water pressure required to provide the important guarantee.Therefore,how to construct the rural pipeline network project is an important subject in this water supply project,and the reasonable selection of pipe diameter is the most important issue.Paper to research the rural water supply pipe network pressure in summarizing the domestic and foreign network optimization and economic pipe diameter economic flow velocity,on the basis of theoretical research results on the economic flow velocity of rural water pipe system economic pipe diameter optimization problem.The main research contents and research results are as follows:1)In view of the rural water supply pipe network project,the minimum total cost of water supply pipe as objective function,the establishment of rural water supply network expression economic cost,cost of rural water supply network of pipe diameter and partial derivatives,the mathematical expression of economic pipe diameter,and according to the diameter and the relationship between the velocity of the mathematic expression of the economic flow rate is deduced.2)Collect relevant data,conduct a comprehensive analysis of the pipeline cost in a region,and arrange the relationship between pipeline cost and pipe diameter.Using enumeration method,linear regression method is used to calculate the parameter values of pipeline cost function,and the analysis method of linear regression analysis is used.3)Calculation of engineering examples,calculates the value of local economic pipe diameter,economic flow velocity,and draw the local economic flow velocity,economic pipe size table for the local engineering construction to provide the reference opinion later.