Results 21 to 30 of about 373 (145)

Regional Runoff Characteristics in Zhengzhou City Based on SCS-CN Model [PDF]

open access: yes, 2022
[Objective] The causes of waterlogging in Zhengzhou City were studied in order to provide a reference for risk prevention and operation management of rainstorm waterlogging disasters in important parts of the urban infrastructure.
Huang Haiping   +5 more
core   +1 more source

贵州省典型土壤中稀土元素含量及分布特征 [PDF]

open access: yes, 2000
本文对贵州省六个主要土类有代表性的典型土壤68个剖面,204个土样中的稀土元素含量及分布进行研究,结果表明:贵州省典型土壤中稀土元素总量(264.44μg/g)高于全国土壤平均含量(195.7μg/g);各土类稀土元素的丰度都遵守Oddo-Harkins法则,Ce元素富集明显。贵州典型土壤中轻稀土元素含量(199.01μg/g)亦高于全国土壤,属典型的轻稀土土壤类型;石灰土中稀土各元素含量大于其它土类 ...
严重玲   +3 more
core  

Effects of Iron-Calcium and Organic Matter Matrix on Cadmium Detection in Soil by Energy Dispersive X-Ray Fluorescence Spectroscopy [PDF]

open access: yes
Cadmium (Cd) is a toxic and harmful heavy metal, and energy dispersive X-ray fluorescence spectroscopy (EDXRF) technology is widely used to detect Cd content in contaminated soil.
Aosong JIANG   +5 more
core   +1 more source

Effects of Continuous Straw Returning Combined with Reduced Fertilizer Application on Rice Yield and Loss of Nitrogen and Phosphorus [PDF]

open access: yes, 2022
[Objective] The effects of straw returning combined with reduced chemical fertilizer application on rice yield and nitrogen and phosphorus losses with runoff were studied in order to provide a scientific basis for the recycling and reuse of local ...
Liang Fan   +8 more
core   +1 more source

The Spatio-temporal Evolution of NDVI in the Three Gorges Reservoir Area Driven by the Synergistic Effect of two Factors over the Past 21 Years [PDF]

open access: yes
[Objective] To clarify the spatio-temporal characteristics of vegetation evolution in the Three Gorges Reservoir Area, and to quantitatively analyze the relationships between vegetation and key determinants, including climate, terrain, and human ...
LI Cheng   +5 more
core   +1 more source

Effects of Land Use Transition on Ecosystem Service Values in Wuling Mountain Region in Chongqing City [PDF]

open access: yes, 2022
[Objective] The effects of land use transition on ecosystem service values (ESV) in the Wulong District were analyzed in order to provide a basis for decision-making regarding rational land use, optimal allocation of resources, development and protection,
Deng Wei   +4 more
core   +1 more source

Distribution Characteristics and Coupling Relationship Between Soil Erosion and Hydrologic and Sediment Connectivity in Changchong River Basin [PDF]

open access: yes
[Objective] To clarify the distribution characteristics and coupling relationship between soil erosion and hydrologic and sediment connectivity in Changchong River Basin, and to provide basis for soil erosion control and soil erosion prevention in this ...
LI Jianing   +4 more
core   +1 more source

Dynamic Changes of Terrestrial Vegetation Cover in Lugu Lake Wetland Nature Reserve, Sichuan Province from 2000 to 2020 [PDF]

open access: yes, 2023
[Objective] The spatial-temporal variation of terrestrial vegetation coverage in Lugu Lake Wetland Nature Reserve in Sichuan Province during 2000—2020 was analyzed in order to provide a reference for the construction and management of the reserve ...
Gao Yu   +4 more
core   +1 more source

Relationship between riparian plant diversity and soil factors in the middle and lower reaches of the Yellow River [PDF]

open access: yes
[Objective] The relationship between species diversity and soil factors in riparian zone is important to maintain the stability of riparian ecosystems. The purpose of the study is to reveal the relationship between species diversity and soil factors in
LI Ya   +3 more
core   +1 more source

含岩屑紫色土水分扩散规律

open access: yesShuitu Baochi Xuebao, 2020
紫色土中存在的岩屑显著影响土壤水分扩散。以往研究主要集中在 > 2 mm岩屑上而忽视了 < 2 mm岩屑的作用。因此,探讨 > 2 mm岩屑对紫色土水分扩散的影响基础上,明确 < 2 mm岩屑的作用对完善含岩屑紫色土水分扩散规律的研究具有重要的意义,从而为土壤水动力学模型的构建提供理论依据。以四川盆地紫色页岩发育的暗棕紫泥土和泥岩发育的红棕紫泥土为研究对象,设置3种岩屑粒径(0.25~2,2~5,5~10 mm)和4种岩屑含量(0,30%,50%,70%),利用水平土柱吸渗法测定含岩屑土壤湿润锋变化特征、
李江文   +4 more
doaj  

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