Results 11 to 20 of about 119,783 (154)
Shuitu Baochi Xuebao, 2016 通过设计2种降雨强度(90，120 mm/h)和4个地表坡度(10°，15°，20°，25°)的模拟降雨试验，研究了降雨强度和坡度对粘黄土坡面片蚀的影响。结果表明，试验条件下当降雨量相同时，降雨强度和坡度对径流量的影响不显著，而对坡面片蚀量的影响非常显著；当降雨强度由90 mm/h增加到120 mm/h时，在相同坡度条件下坡面片蚀量增加76.2%～128.0%；当坡度由10°变化到25°时，90 mm/h和120 mm/h两种降雨强度坡面片蚀量分别增加29.3%～72.1%和1.8%～75.4 ...
盛贺伟 +3 more
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Shuitu Baochi Xuebao, 2020 为深入理解棕壤垄作坡耕地的土壤侵蚀机理，利用1.60 m×0.53 m的试验土槽，设计2个降雨类型，即增强型（70~70~100~100 mm/h）和减弱型（100~100~70~70 mm/h），以及2个坡度（9°和18°）的人工模拟降雨试验。每个雨型分2个阶段（阶段I、阶段Ⅱ），每个阶段进行相同雨强的2个场次降雨，每个场次降雨历时20 min。结果表明：（1）雨强对径流量呈显著影响（P70 mm/h时的径流量。在减弱型雨型下，坡度对径流量影响显著（P 18°增强型；总产沙量从大到小依次为：18 ...
徐相忠, 刘前进, 张含玉
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Flowers with deep corollas are frequently associated with nectar robbing, a behaviour that often reduces pollen transfer and seed production. Robbing scars, however, may further affect plant reproductive success through rainwater entry into corolla tubes.
Wu Sun +6 more
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International Journal of Applied Linguistics, EarlyView.ABSTRACT This qualitative multiple case study explores multilingual postgraduate students’ academic identities through writing at an EMI university in Hong Kong, with a focus on how they gain legitimacy in knowledge‑making with their multilingual repertoires. Grounded in a poststructuralist understanding of identities as fluid and negotiated, the study
Siqi Song, Ken Lau
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, 2015 本发明公开一种人工模拟降雨雾化的方法和装置，所述装置包括：水气两用喷头、高压导气管、空气压缩机和变频器，其中，所述水气两用喷头的进水口与降雨管路的供水端口连接，所述水气两用喷头的进气口与高压导气管的一端连接，所述高压导气管的另一端连接空气压缩机，所述空气压缩机与变频器相连。本发明在小雨强降雨的时候打开空气压缩机将带有压力的空气通过水气两用喷头与被降雨水混合，通过高压气体将被降雨水喷射，从而达到预设喷射角度和雾化效果，避免了现有人工降雨设备的不足。另外，通过调节变频器，可以根据雨强调整空气压缩机的输出气压，
李世海 +5 more
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Shuitu Baochi Xuebao, 2023 为探究桂西北喀斯特区石灰土与红壤坡地幼龄橘园的降雨侵蚀特征,通过室内人工模拟降雨试验,研究3种降雨强度(30,60,90 mm/h)下,石灰土与红壤坡地幼龄橘园的产流产沙特征。结果表明:(1)降雨强度为30,60 mm/h时,红壤橘园的产流总量分别为石灰土橘园的2.46,1.83倍,且红壤橘园主要以地表产流为主,石灰土橘园主要以壤中流产流为主;当降雨强度为90 mm/h时,二者产流总量无显著性差异(p>0.05),均以地表产流为主。(2)石灰土橘园与红壤橘园地表径流强度随降雨强度增大而增大 ...
郑金德 +5 more
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Power Leveraging: The Everyday Expansion of the Grassroots State in Urban China
Law &Policy, Volume 48, Issue 4, October 2026.ABSTRACT China has witnessed a notable expansion of state power during and after the pandemic, particularly at the grassroots level. How has this occurred? The Shequ, a grassroots state agent, has played a central role, taking on extensive administrative responsibilities aimed at enhancing social management, often at the expense of rule‐of‐law ...
Aokai Yang
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Functional Ecology, Volume 40, Issue 9, Page 2843-2860, September 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Drylands are mainly structured by both vascular plants and biological soil crusts (biocrusts), the latter often regarded as a self‐organizing component of these ecosystems.
Haoran Luo +13 more
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World Water Policy, Volume 12, Issue 3, August 2026.ABSTRACT Groundwater depletion is a major challenge in semiarid, hard‐rock regions where irrigation demands often exceed natural recharge. This study evaluates the effectiveness of farm‐scale recharge pits as a local, supplementary, and community‐managed groundwater recharge solution in the Dharta catchment of Rajasthan, India. Alongside check dams and
Prahlad Soni +4 more
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Shuitu Baochi Xuebao, 2011 通过室内模拟降雨研究降雨强度对含砾石土壤产沙及入渗的影响。结果表明:整个降雨过程中,60mm/h的降雨强度下,产沙率变化相对平稳,90mm/h和120mm/h的降雨强度下,土壤产沙率的变化均因为有细沟而产生波动,120mm/h的降雨强度下,细沟出现的时间较90mm/h的降雨强度提前了5～20min;降雨强度的增加导致土壤总产沙量也显著增加,当降雨强度从90mm/h增加到120mm/h时,总产沙量的增加量是降雨强度从60mm/h增加到90mm/h时总产沙量增加量的0.83～2.82倍;随着降雨强度的增加 ...
吴冰, 朱元骏, 邵明安
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