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| 土壤水分对土壤参数的敏感性及其参数优化方法研究 | |
| 引用本文： | 张添,黄春林,沈焕锋.土壤水分对土壤参数的敏感性及其参数优化方法研究[J].地球科学进展,2012,27(6):678-685. |
| 作者姓名： | 张添 黄春林 沈焕锋 |
| 作者单位： | 1. 武汉大学资源与环境科学学院,湖北武汉430079／中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 2. 中国科学院寒区旱区环境与工程研究所,甘肃兰州,730000 3. 武汉大学资源与环境科学学院,湖北武汉,430079 |
| 基金项目： | 国家自然科学基金项目“基于数据同化方法的人类活动对植被动态变化贡献率估计及其不确定性分析”，中国科学院“百人计划”项目“寒旱区地表水文关键要素的多源遥感数据同化研究”，国家重点基础研究发展计划项目“空间观测全球变化敏感因子的机理与方法” |
| 摘 要： | 利用2008年1月1日至2009年9月31日黑河流域阿柔冻融观测站的气象和土壤水分数据,采用基于方差的多参数敏感性分析方法研究通用陆面模型(Common Land Model,CoLM)模拟的土壤水分对土壤质地(砂土和黏土)的敏感性,进而采用SCE-UA参数优化算法分别优化土壤质地和土壤水力参数,分析不同优化策略对土壤水分模拟结果的影响。研究结果表明,浅层土壤水分对土壤质地较为敏感,敏感性系数达到了0.45以上,并且砂土含量对土壤水分的影响更为显著;利用SCE-UA算法优化土壤质地或土壤水力参数都可以有效地提高土壤水分的模拟精度,优化土壤水力参数易产生"异参同效"现象,而优化土壤质地能够使土壤水力参数的取值范围更加合理。 |
| 关 键 词： | 土壤质地 土壤水力参数 土壤水分 敏感性分析 SCE-UA算法 |
Sensitivity and Parameters Optimization Method of Soil Parameters to Soil Moisture in Common Land Model |
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| Zhang Tian,Huang Chunlin,Shen Huanfeng.Sensitivity and Parameters Optimization Method of Soil Parameters to Soil Moisture in Common Land Model[J].Advance in Earth Sciences,2012,27(6):678-685. | |
| Authors: | Zhang Tian Huang Chunlin Shen Huanfeng |
| Institution: | 1. School of Resource and Environmental Science，Wuhan University，Wuhan430079, China;; 2. Cold and Arid Regions Environmental and Engineering Research Institute，Chinese Academy of Sciences，Lanzhou730000, China |
| Abstract: | The sensitivity analysis of soil moisture to soil texture(sand and clay) was studied by using the common land model and meteorological forcing data from January 1,2008 to September 31,2009 at the Arou Observation Station in Heihe river basin.The SCE-UA algorithm was utilized to optimize the soil texture and soil hydraulic parameters separately and the impact of the result of soil moisture with different strategies was analyzed.The result shows that surface moisture is quite sensitive to soil texture,the sensitivity coefficients are larger than 0.45,and the sand percentage is more significant to the soil moisture;SCE-UA algorithm is used to optimize the soil texture or soil hydraulic parameters which can effectively improve the accuracy of soil moisture simulation.However,optimizing soil hydraulic parameters will likely lead to the apperance of the phenomenon of equifinality for different parameters,while optimizingsoil texture can constrain the range of soil hydraulic parameters and make them more reasonable. |
| Keywords: | Soil texture Soil hydraulic parameter Soil moisture Sensitivity analysis SCE-UA algorithm |
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