Physicochemical Properties And Infiltration Characteristics Of City Soil From Different Functional Areas In Huainan

Based on field investigation and indoor experiment, for research the distrib ution characteristics and interaction relationship of soil physical and chemical Pr operties and soil infiltration characteristics and infiltration law model of different function areas. On the basis of revealing the distribution of soil physical and ch emical properties, infiltration properties and soil infiltration and thefactors affec ting of the best model. In order to provide effective information forurban soil c artography and provided a reference for the urban development planning.(1) Through the indoor experiment, studied the soil bulk density, water content, saturated water content, maximum water holding capacity, particle comp o-sition and pH value, water soluble salt of different functional areas. The resul ts show that the research areas of different functional areas urban soil saturated water content and the largest capacity distribution for farmland protection areas> industrial zone> scenic spot> business zone> cultural and educa-tional area; Moisture content distribution for farmland protection areas> industrial zone> c ultural and educational area> scenic spot> business district; The order size of bulk density for business zone>cultural and educational area> scenic zone> in dustrial zone>farmland protection ar-eas. It show that the research areas of diff erent function areas urban soil of sand, silt and clay composition changed little, respectively for46±3%,28±2%,26±1%. The study area soil show weak acidic soil the pH of30-50cm soil profile change smaller, at the30cm depth profile o f soil salinization degree bigger, section30-50cm soil soluble salt content decre ase soil leaching.(2) Used the double ring gauge measuring urban soil infiltration conditions of different function-al areas. The study of measurement data results show that the different functional areas of soil initial infiltration rate size, distribution for farmland protection areas>scenic area>cultural and education-nal area> industr ial zone>business district. Farmland protection areas soil initial infiltration rate significantly greater than other functional areas, scenic and cultural area soil in itial infiltration rate of size, the size of industrial and commercial soil initial inf iltration rate in small place. Based on the stable head measured city soil perme ability coefficient for different functional areas distribution for farmland protection areas> industrial zone> scenic spot> cultural and educational area> busines s district.(3) Through analysis the determination results of soil infiltration rate, the curves of soil infiltration rate following been function, therefore choose Philip equation, A.H.Kostiakov equation to simulate the soil infiltration model. The results showed that Philip equation with A.H.Kostiakov equation can be effect-tively simulated different functional areas, A.H.Kostiakov equation simulation is more efficient than Philip equation to simulate the soil infiltration model. The "S" of Philip equation for Business district, industrial area, cultural area, farm-land protection areas and scenic spot is3.76,3.35,3.96,3.35,3.96. The most soil infiltration capability of farmland protection areas, followed by scenic area, other area soil infiltration coefficient difference. A.H.Kostiakov equation of soil infiltration model parameters for simulation business district (a=20.59,n=0.3145), industrial zone (a=85.23,n=0.1513), cultural and educational area (a=104.4,n=0.1448), farmland protection area (a=154.3, n=0.1932), scenic spot (a=62.50, n=0.2167), In the soil of different function areas cumulative infiltration volume of the model in the study of Philip accumulated infiltration equation can’t effic-ientsimulation of soil infiltration amount accumulative total process.