| Badan Jaran Desert is located in Alashan, the western of Inner MongoliaAutonomous Region. It has arid climate, scarce rainfall, deep groundwater level andfragile ecological environment. It is important to study moisture migration within thevadose zone for the Badain Jaran Desert groundwater sources. In the paper, wemainly discuss the moisture migration within the vadose zone which is located in theSoviet Wood Jilin South Lake and its surrounding region, the south of Badan JaranDesert. In our research, we combined the field monitoring data and the Numericalsimulation together to simulate the moisture migration.The paper collects relevant literature data, and summarizes the research progressof vadose moisture migration in Badan Jaran Desert, and determines the researchobjectives and the technical route of this paper. This paper collects field observationdata of TDR, PF-Meter, Watermark and weather stations. The study area for soilmoisture, soil water potential, precipitation, temperature and other factors wereanalyzed to determine the study area moisture changes scope and the role of dry sandlayer. The moisture of vadose zone within the study area is generally small. The drysand layer moisture is affected by evaporation and precipitation strongly. The wettinglayer is protected by and layer, so it is less fected by precipitation and evaporationfactors, making the water content is stable.We use the Hydrus-1D to simulate the moisture migration from1960to2013and analysis the results. We access to water flux at a depth of3m. Average infiltrationflux under natural rainfall conditions for many years is9.98mm/d, and average annualrainfall recharge coefficient is0.1155. Deep soil moisture leakage of normal flow year(rainfall of121.1mm) is9.92mm, and the rainfall recharge coefficient is0.0819.When the simulation period reaches to54years, the infiltration flux below3m will bealmost no changes. The results have practical value for understanding groundwaterrecharge in the desert conditions. |
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