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Conference Paper: What is the philosophy of modelling soil moisture movement?
Title | What is the philosophy of modelling soil moisture movement? |
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Authors | |
Issue Date | 2009 |
Publisher | American Geophysical Union. |
Citation | AGU Fall Meeting, San Francisco, CA, 14–18 December 2009, p. Program no.H41C-0899 How to Cite? |
Abstract | In laboratory, the soil moisture movement in the different soil textures has been analysed. From field investigation, at a spot, the soil moisture movement in the root zone, vadose zone and shallow aquifer has been explored. In addition, on ground slopes, the interflow in the near surface soil layers has been studied. Along the regions near river reaches, the expansion and shrink of the saturated area due to rainfall occurrences have been observed. From those previous explorations regarding soil moisture movement, numerical models to represent this hydrologic process have been developed. However, generally, due to high heterogeneity and stratification of soil in a basin, modelling soil moisture movement is rather challenging. Normally, some empirical equations or artificial manipulation are employed to adjust the soil moisture movement in various numerical models. In this study, we inspect the soil moisture movement equations used in a watershed model, SWAT (Soil and Water Assessment Tool) (Neitsch et al., 2005), to examine the limitations of our knowledge in such a hydrologic process. Then, we adopt the features of a topographic-information based on a hydrologic model, TOPMODEL (Beven and Kirkby, 1979), to enhance the representation of soil moisture movement in SWAT. Basically, the results of the study reveal, to some extent, the philosophy of modelling soil moisture movement in numerical models, which will be presented in the conference. Beven, K.J. and Kirkby, M.J., 1979. A physically based variable contributing area model of basin hydrology. Hydrol. Science Bulletin, 24: 43-69. Neitsch, S.L., Arnold, J.G., Kiniry, J.R., Williams, J.R. and King, K.W., 2005. Soil and Water Assessment Tool Theoretical Documentation, Grassland, soil and research service, Temple, TX. |
Persistent Identifier | http://hdl.handle.net/10722/224375 |
DC Field | Value | Language |
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dc.contributor.author | Chen, J | - |
dc.contributor.author | Wu, Y | - |
dc.date.accessioned | 2016-04-01T03:56:41Z | - |
dc.date.available | 2016-04-01T03:56:41Z | - |
dc.date.issued | 2009 | - |
dc.identifier.citation | AGU Fall Meeting, San Francisco, CA, 14–18 December 2009, p. Program no.H41C-0899 | - |
dc.identifier.uri | http://hdl.handle.net/10722/224375 | - |
dc.description.abstract | In laboratory, the soil moisture movement in the different soil textures has been analysed. From field investigation, at a spot, the soil moisture movement in the root zone, vadose zone and shallow aquifer has been explored. In addition, on ground slopes, the interflow in the near surface soil layers has been studied. Along the regions near river reaches, the expansion and shrink of the saturated area due to rainfall occurrences have been observed. From those previous explorations regarding soil moisture movement, numerical models to represent this hydrologic process have been developed. However, generally, due to high heterogeneity and stratification of soil in a basin, modelling soil moisture movement is rather challenging. Normally, some empirical equations or artificial manipulation are employed to adjust the soil moisture movement in various numerical models. In this study, we inspect the soil moisture movement equations used in a watershed model, SWAT (Soil and Water Assessment Tool) (Neitsch et al., 2005), to examine the limitations of our knowledge in such a hydrologic process. Then, we adopt the features of a topographic-information based on a hydrologic model, TOPMODEL (Beven and Kirkby, 1979), to enhance the representation of soil moisture movement in SWAT. Basically, the results of the study reveal, to some extent, the philosophy of modelling soil moisture movement in numerical models, which will be presented in the conference. Beven, K.J. and Kirkby, M.J., 1979. A physically based variable contributing area model of basin hydrology. Hydrol. Science Bulletin, 24: 43-69. Neitsch, S.L., Arnold, J.G., Kiniry, J.R., Williams, J.R. and King, K.W., 2005. Soil and Water Assessment Tool Theoretical Documentation, Grassland, soil and research service, Temple, TX. | - |
dc.language | eng | - |
dc.publisher | American Geophysical Union. | - |
dc.relation.ispartof | AGU Fall Meeting | - |
dc.rights | AGU Fall Meeting. Copyright © American Geophysical Union. | - |
dc.rights | For postprint: An edited version of this paper was published by AGU. Copyright (year) American Geophysical Union. | - |
dc.title | What is the philosophy of modelling soil moisture movement? | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Chen, J: jichen@hkucc.hku.hk | - |
dc.identifier.email | Wu, Y: yipingwu@hkusua.hku.hk | - |
dc.identifier.authority | Chen, J=rp00098 | - |
dc.identifier.hkuros | 179803 | - |
dc.identifier.spage | Program no.H41C | - |
dc.identifier.epage | 0899 | - |
dc.publisher.place | San Francisco, CA | - |