| INVERSE METHOD TO DETERMINE SOIL HYDRAULIC PROPERTIES FROM TRANSIENT OUTFLOW EXPERIMENTS |
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| 作者姓名： | ZHANGJun XUShao-hui LIUJian-li ZHANGJia-bao |
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| 作者单位： | InstituteofSoilScience,ChineseAcademyofSciences,Nanjing210008,China |
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| 基金项目： | ProjectsupportedbytheNationalNaturalScienceFoundationofChina(GrantNos:49971041,40271059),andtheNationalKeyBasicResearchandDevelopmentProgramofChina(GrantNo:1999011803). |
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| 摘 要： | Transient outflow experiments coupling with an inverse method are promising to derive soil hydraulic information. The water retention curves obtained from one-step and multi-step outflow experiments were compared with those from the pressure cell method. We found that in one-step experiments the increment of pressure would reduce the non-uniqueness of inverse technique and that in multi-step experiment the combination of cumulative outflow with pressure head in the objective function would improve the final estimation and also reduce the non-uniqueness of inverse problem.
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| 关 键 词： | 逆推法 土壤水压性质 多步流出实验 操作流程 |
INVERSE METHOD TO DETERMINE SOIL HYDRAULIC PROPERTIES FROM TRANSIENT OUTFLOW EXPERIMENTS |
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| ZHANGJun XUShao-hui LIUJian-li ZHANGJia-bao.INVERSE METHOD TO DETERMINE SOIL HYDRAULIC PROPERTIES FROM TRANSIENT OUTFLOW EXPERIMENTS[J].Journal of Hydrodynamics,2004,16(6):675-680. |
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| Authors: | ZHANG Jun XU Shao-hui LIU Jian-li ZHANG Jia-bao Institute of Soil Science Chinese Academy of Sciences Nanjing China |
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| Affiliation: | ZHANG Jun,XU Shao-hui,LIU Jian-li,ZHANG Jia-bao Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China |
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| Abstract: | Transient outflow experiments coupling with an inverse method are promising to derive soil hydraulic information. The water retention curves obtained from one-step and multi-step outflow experiments were compared with those from the pressure cell method. We found that in one-step experiments the increment of pressure would reduce the non-uniqueness of inverse technique and that in multi-step experiment the combination of cumulative outflow with pressure head in the objective function would improve the final estimation and also reduce the non-uniqueness of inverse problem. |
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| Keywords: | inverse method hydraulic properties one-step outflow experiment multi-step outflow experiment |
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