Results 31 to 40 of about 955 (141)
Slope Rill Erosion and Morphological Evolution Based on UAV Nap-of-the-object Photogrammetry [PDF]
, 2023 [Objective] This study was conducted to determine a rill erosion technology having high efficiency, high accuracy and strong adaptability, and overcome deficiencies associated with traditional measurement methods (low efficiency, high cost, poor ...
Gao Zhaoliang +7 more
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In situ Adsorption Technology for Remediation of Cr(Ⅵ) Contaminated Soil [PDF]
The commonly used remediation technologies for Cr(Ⅵ) contaminated soil, such as guest soil, reduction, solidification, microbiology, etc., have drawbacks such as high cost, slow efficiency, and secondary oxidation of Cr(Ⅵ).
Cui CAO +8 more
core +1 more source
Soil and Water Conservation and Ecological Benefits of Forest Ecosystem in New Urban Karst Areas of Central Guizhou Province [PDF]
, 2022 [Objective] Soil and water conservation and ecological benefits of forest ecosystem in the new urban karst areas of Guanshanhu District, Guiyang City in Central Guizhou Province were studied to scientifically evaluate the achievements of ecological ...
Dai Zhengjiao +6 more
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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
doaj
Shuitu Baochi Xuebao, 2019 为研究红壤地区土壤容重对涌泉根灌水分入渗能力的影响，以江西红壤为例，采用室内试验，研究了不同容重条件下红壤涌泉根灌水分运移及其分布特性。结果表明：容重对土壤入渗能力有显著影响。随着容重的减小，湿润锋、累积入渗量、入渗率均呈增大趋势，且容重越小，减小的幅度越大。湿润锋、累积入渗量以及稳渗率与土壤容重均呈幂函数负相关关系；对于同一深度土层，土壤容重越大，对应的土壤含水率越小，在水分再分布过程中容重对含水率分布的影响逐渐减弱。通过Kostiakov入渗模型表明，土壤初始入渗速率随容重增大而减小，且容重越大 ...
刘风华, 代智光, 费良军
doaj
Shuitu Baochi Xuebao, 2021 为揭示甘肃省不同气候区不同质地土壤的容重、田间持水量和凋萎湿度的差异，对观测资料的适用性和推广价值进行评价。通过对77个站点10—100 cm土壤水分资料的分析，结果表明：甘肃省全省的土壤容重范围为0.89~1.79 g/cm3，平均值为1.36 g/cm3，表层土壤容重与深层土壤容重差异显著 ...
杨阳 +5 more
doaj
Effects of Artificial Cyanobacterial Crust on Soil Wind Erosion Control in Arid Regions [PDF]
, 2023 [Objective] The influence factors of artificial cyanobacterial crust on soil threshold wind velocity and wind erosion rate, and the effects of wind erosion prevention and control were analyzed, and the feasibility of using artificial cyanobacterial crust
Gao Liqian, Huang Minghui, Zhao Yunge
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Shuitu Baochi Xuebao, 2006 以黑土侵蚀和重点治理的典型流域——黑龙江省拜泉县通双小流域为案例，通过田间取样和测定、数字高程模型（DEM）导出、遥感影像（Landsat-7ETM＋）解译分别获得容重、地形因子和土地类型数据。运用经典统计和地统计学方法，结合地理信息系统（GIS），探讨侵蚀黑土表层土壤容重空间分异与地形和土地利用的关系。结果表明：小流域尺度上，黑土土壤容重变异（14％）和空间自相关性（块金值／基台值。Co／Co＋C=41．18％，变程2402m）均属于中等强度。坡位和土地利用是影响容重变异的最突出因素 ...
魏建兵 +3 more
doaj +2 more sources
Shuitu Baochi Xuebao, 2011 采用经典统计学方法,通过网格布点,研究黄土高原坡地表层土壤水分和容重在降雨后不同时段的空间变异特征。结果表明:(1)降雨后第1天,表层土壤水分和容重的变异程度分别为中等、弱变异性;在各坡向间土壤水分呈阴坡>阳坡>山脊的变化趋势,容重为阴坡>山脊>阳坡;(2)降雨后第20天,土壤水分和容重的变异程度均保持不变,但土壤水分在不同坡向间的数量特征发生改变(阴坡>山顶>阳坡),而容重的变化趋势保持不变;(3)表层土壤水分具有弱的时间稳定性,而容重的时间稳定性较强。(4)相关分析表明,降雨后第1天 ...
王云强, 张兴昌, 朱元骏, 曾辰
doaj
Effects of different types of organic fertilizers on soil, growth and fruiting characteristics, and nut quality in walnut orchards [PDF]
[Objective] The study aimed to explore the effects of different organic fertilizers on the physical and chemical properties of the soil, tree growth, fruiting characteristics, and nut quality in a walnut orchard. [Methods] A randomized block experimental
JIANG Dezhi +6 more
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