Results 1 to 10 of about 181 (134)
Shuitu Baochi Xuebao, 2005 应用VanGenuchten提出的土壤水分特征曲线公式,推导出了沙漠风沙非饱和土壤水分特征曲线的分形模型。通过对古尔班通古特沙漠地9种不同土壤样本利用中子水分仪和负压计实测的水分特征曲线资料反求得到相应的分形维数,分析了分形维数与土壤质地之间的关系,结果表明随着土壤质地从流动风沙土、半固定风沙土到固定风沙土的变化,其分形维数呈逐渐增大。此外,基于土壤颗粒的重量与粒径分布求出了古尔班通古特沙漠地风沙土壤粒径的分形维数。通过对土壤水分特征曲线的分形维数与土壤粒径的分形维数的对比 ...
苏里坦 宋郁东 张展羽
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Shuitu Baochi Xuebao, 2007 土壤水分特征曲线（SWCC）测定过程本身会引起很大的容重变化。随着容重的增大,土壤的持水特性也发生改变。为了明确这种容重变化对土壤水分特征曲线的影响,本研究以4种原状土壤为例,用离心机法测定了不同定容重下的土壤水分特征曲线,分析了容重变化对Brooks-Corey和van Genuchten模型参数的影响。结果表明：土壤的容重越大,相同吸力下所对应的有效饱和度就越大,水分特征曲线就越平缓。4种土壤的参数A和α均随容重的增大而减小,可用幂函数表示。黑垆土和土娄土的λ、n随容重的增加而增大,可用线性函数描述,
付晓莉, 邵明安
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Dynamic Simulation of Soil Moisture Under Typical Land Preparation in Semi-arid Loess Area Using HYDRUS-1D Model [PDF]
, 2023 [Objective] The dynamic characteristics of soil moisture under different land preparation measures were analyzed in order to provide a scientific basis for assessing the eco-hydrological benefits of slope land preparations and for promoting vegetation ...
Dong Hongxia, Wei Qiang, Zhang Qindi
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Comparison of Infiltration Capacity Between Grassland of Different Time Lengths of Abandonment and Sea Buckthorn Land in Inner Mongolia [PDF]
, 2023 [Objective] The effect of different vegetation covers on soil infiltration capacity in Inner Mongolia was analyzed in order to provide a theoretical basis for ecological restoration and vegetation allocation of the region.
Cheng Shuai +5 more
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Comparative Study on Soil Infiltration Characteristics of Different Land Use Types in Horqin Sandy Land [PDF]
, 2022 [Objective] The differences in water infiltration characteristics between different land use types in Horqin sandy land were determined in order to provide a scientific reference for the study of water and material transport in the vadose zone in arid ...
Ala Musa +3 more
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Shuitu Baochi Xuebao, 2021 为研究崩岗不同土层土壤水力学特性的差异性，采用离心法测定不同土层土壤水分特征曲线，筛选出适合的土壤水分特征曲线拟合模型，结合统计模型，推求土壤的当量孔径分布、比水容量、非饱和导水率和扩散率，分析崩岗不同土层土壤水力学参数的变化规律。结果表明，崩岗土层从红土层到砂土层的变化过程中，土壤质地由黏土向砂土变化；Fredlund & Xing模型对崩岗土壤土水特征曲线拟合效果最好；参数θs、α、n随着质地变黏重逐渐减小；随着土层深度的增加，土壤的持水性能降低；土壤比水容量 ...
辜婧瑶 +3 more
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Shuitu Baochi Xuebao, 2003 在分析土壤水分特征曲线经验模型中特征参数的基础上，选取5种不同质地土壤，利用张力计测定了土壤水分特征曲线，根据实验资料确定了土壤水分特征曲线经验模型中参数，采用回归分析方法建立了参数与土壤物理特性间的函数关系，为采用土壤颗粒组成等土壤物理特性确定土壤水分特征曲线提供了指导。
来剑斌 王全九
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Effects of different land use types on soil structure and hydraulic characteristics of reclaimed coal mines in semi-arid areas [PDF]
In order to explore the water characteristics of soil in reclaimed coal mines in semi-arid areas and make better use of the land in reclaimed mining areas, the basic physical properties, water characteristic curves, unsaturated water conductivity and ...
Duomei LI +5 more
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Soil Hydrothermal Characteristics of Orchard Based on Leaf Area Index Coupled with STEMMUS Model [PDF]
[Objective] As a key parameter in the simulation study of ecosystem water cycle process, rapid dynamic simulation of leaf area index (LAI) can solve the limitation that the coupled soil water-vapor-heat-air model STEMMUS (simultaneous transfer of energy,
GAO Xiaodong +3 more
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基于组合赋权灰色关联TOPSIS的节水灌溉效益评价 [PDF]
, 2018 在总结现有研究与评价方法的基础上,建立了节水灌溉综合效益评价指标体系。通过群决策相对熵集结模型确定指标的主观权重,改进熵值法确定指标的客观权重,然后将两者组合最终求得评价指标的权重。对TOPSIS方法与灰色关联决策方法分别作改进,通过引入一个考虑决策者偏好的新的相对贴近度度量方式,对二者有机地结合;构建了基于组合赋权的改进TOPSIS-灰色关联决策模型,并将此模型方法应用在某一地区节水灌溉效益评价的实际问题中,最终得出的评价结果基本与实际情况保持一致,进而验证了本模型与方法的可行性与有效性 ...
宁宝权, 郭亚丹, 陕振沛
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