Study On Hydrological Effect Of Urban Soil In Fuxin City

Urban soil is an important part of urban hydrological process.Although urbanization process has brought people a higher material civilization,it also brings a series of ecological and environmental problems.In this paper,the physical and chemical properties of urban soils in Fuxin,the infiltration characteristics,evaporation characteristics and interception effects of urban soils in Fuxin were studied.(1)The initial soil water content of each plot decreased first and then increased with the increase of soil depth,ranging from 17.28% to 5.09%.The clay content of each plot was relatively low,ranging from 3.66% to 1.26%,belonging to loam sandy soil and sandy loam soil.The soil was alkaline seriously,the soil fertility was low and the nutrient deficiency was obvious.(2)The infiltration rate of all plots decreased obviously with the increase of water volume,and gradually stabilized with the extension of time.The initial infiltration rate was 145.23?73.89mm/min,which was significantly correlated with soil non-capillary porosity,and the stable infiltration rate was 22.17?0.51mm/min,which was significantly correlated with soil bulk density and total soil porosity.(4)The evaporation amount of urban soils in the early stage is obviously larger than that in the late stage,and the cumulative evaporation amount slows down with time.The initial evaporation amount is between 1.44 mm and 1.07 mm,which is positively correlated with the initial moisture content.The stable evaporation amount is between 0.82 mm and 0.39 mm,which is significantly correlated with the clay content of soils,sand content of soils,and the cumulative evaporation of soils.The amount ranged from 13.41 mm to 10.28 mm,which was negatively correlated with soil organic matter content,soil sand content and soil clay content.(5)With the increase of rainfall intensity,the stable runoff and sediment content of different types of urban soils increase gradually,while the surface runoff is greatly affected by soil bulk density and soil porosity when the rainfall intensity is 30 mm/h and 40 mm/h,and the surface runoff is greatly affected by organic matter content and soil clay content when the rainfall intensity is 50 mm/h and 60 mm/h.The comprehensive score should be green space and square land > public land > water land > residential land > traffic land > agricultural land > suburban land > Industrialland,among which green space and square land is the largest and industrial land is the smallest.This paper comprehensively reflects the soil and water conservation effect of urban soils in Fuxin from the aspects of physical and chemical properties of urban soils,soil infiltration,soil evaporation and soil closure effect,which is beneficial to the construction of good ecological environment in Northwest Liaoning Province and provides scientific basis and guidance for the construction of urban ecological environment in Western Liaoning Province.