Research Of Salt Spatial Difference Characteristics And Law Of Water And Salt Transport Based On The In-situ Observation

Soil salinization is a livelihood issue of global environmental problems of facinghumanity, is widely distributed in China. Geographically, saline soil is divided intoinland salt and coastal saline, where the coastal saline soil as reserve land resourceshas an extremely important strategic position. Although in recent years for thedifferent characteristics of salt water and salt transport and coastal saline soilimprovement research carried out a lot, but most of the trial or in the main room, sofor field sampling and monitoring process for the study of spatial variability and waterand salt transport the current law is the core issue of saline soil.In this paper, we study mainly divides into the regional scale on the spatialdifferentiation characteristics of soil salt content of soil water and salt migration andpoint scale two parts. Therefore, for southern Lai zhou Bay coastal spatial variation ofsoil salt and soil water and salt migration research has practical significance. First, inthe southern Lai zhou Bay to choose something long about5km, north and southabout5km long after the typical study area, in the study area layout sampling points,and then use statistics, combined with the geographic information system (GIS), thusthe analysis of soil salt ion in the study area space differentiation characteristics;Second, salt and water movement of field automatic observation system testapplication research, first and second in the study area layout a monitoring system forin situ observation, the realization of the remote monitoring for a long time.In this paper, the main conclusions are the following three parts:First of all, on soil salt space differentiation characteristics at home and abroadand the research status of soil water and salt migration rule were summarized, and putforward to combine the two methods and the research train of thought.Secondly, through the statistical analysis found that the study area in80~100cm soil salt accumulation obviously, roughly "bottom poly" type distribution; Fromthe point of variation coefficient, so the soil salt content which showed moderate variation in horizontal direction strength; Space structure analysis shows that the soilof the piece of gold value/base stations range between8.9%~19.3%, have strongspatial correlation and spatial correlation suggests that is made by structural factors(the terrain, soil type and parent material, climate, etc.). Salt from soil spatialdistribution pattern, the typical research area of different soil salt content of the highvalue area is larger, the spatial distribution of soil salt content is generally arepresented by the law of the southeast to northwest gradually reduced.Finally, through a series of indoor test application monitoring system, find the setof resistivity monitoring device in the process of salt and water movement observationis effective, feasible, for the analysis of characteristics of salt and water movement inthe process of salinization provides a simple and reliable method. Applied to the fieldfor a long time observation found that daily variation of water and salt migration,long-term change, during the rainfall.Main innovation point of this article is the first time that Lai zhou bay typicalstudy area the surface domain analysis of the spatial distribution of soil salt and in situobservation point domain analysis, comprehensive analysis and discussion of Laizhou bay soil salt water and salt migration space differentiation characteristics andregularity of in-situ observation.