Results 1 to 10 of about 2,017 (148)
Characteristics of Erosive Rainfall and Its Effects on Runoff and Sediment Yield in a Low Mountain and Hilly Area of Lianyungang City [PDF]
, 2022 [Objective] The effects of different rainfall characteristics and different underlying surface conditions on soil erosion and sediment yield were determined in a low mountain and hilly area of Lianyungang City, Jiangsu Province, in order to provide a ...
Cheng Jianmin +3 more
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Shuitu Baochi Xuebao, 2023 通过野外微小区原位观测试验,基于降雨过程中降雨的集中时段对2017—2021年34次侵蚀性降雨雨型进行划分,系统分析雨型变化对黄土坡面细沟间侵蚀的影响及坡度效应。结果表明:研究区以前期型降雨为主,占总场次的52%,中期型和后期型降雨各占24%。中期型降雨对总产流量的贡献(25.56%±3.83%)显著低于前期型(36.70%±2.07%)和后期型(37.74%±4.01%)(p中期型>前期型,后期型和中期型降雨显著高于前期型。而降雨的场均产沙量则表现为后期型>前期型>中期型,且后期型降雨显著高于中期型 ...
伍林 +6 more
doaj
CLARIFYING THE ACCURACY OF NUMERIC RAINFALL FORECASTS TO EXTREMELY HEAVY RAINFALL EVENTS [PDF]
, 2015 In recent years, refinement in the accuracy of rainfall forecasting has been called for in Japan because of extremely heavy rainfalls that have occurred in various areas.
中津川 誠, 沖 岳大
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Shuitu Baochi Xuebao, 2020 为研究雨型对华北土石山区坡面土壤侵蚀的影响，通过室内人工模拟降雨试验，以华北土石山区主要土壤类型黄土性褐土和石灰性褐土为研究对象，设计次降雨中平均降雨强度和降雨量相同的3种不同降雨类型（均匀型、增加型、减弱型对应的降雨强度组合分别为60，30~60~90，90~60~30 mm/h），分析不同雨型下华北土石山区坡面产流产沙的变化规律。结果表明：（1）不同雨型的产流时间与起始阶段降雨强度呈负相关，增加型降雨的坡面产流时间最长，且分别为均匀型和减弱型的1.98，4.15倍；减弱型降雨的总径流量和总侵蚀量最大，
黎俊佑 +7 more
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Shuitu Baochi Xuebao, 2023 作为水土流失重点预防保护区,大别山南麓裸地坡面水土流失严重,为探究该区典型裸地坡面径流泥沙对降雨的响应,利用自动化径流泥沙监测设备对裸地径流小区的降雨—径流-泥沙过程进行监测。以2020年全年侵蚀性降雨数据为基础,依据降雨峰值时序划分雨型,分析了4种雨型的累计产流产沙特征和次降雨的径流泥沙特征,并建立了累计产流产沙的最优函数模型。结果表明:(1)大别山南麓降雨事件的I30是影响降雨事件的泥沙量和径流系数的重要因素;前期集中型和中期集中型降雨事件的泥沙量与前48 h内的降雨量呈显著正相关。(2 ...
钟祎珣 +5 more
doaj
From demonstrative to definite and beyond: the case of nage in spoken Taiwan Mandarin
Faits de Langues, 2014 When demonstrative pronouns undergo grammaticalization, they have regularly been shown to evolve into definite or specific articles (Lehmann 2002, De Mulder & Carlier 2001). In a synchronic perspective, it has also been shown that for some languages, demonstrative determiners are not restricted to deictic or anaphoric functions, but may extend their ...
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Shuitu Baochi Xuebao, 1994 在分析了子午岭林区开垦裸露地降雨侵蚀资料的基础上，首次研究了不同地形部位开垦裸露地上的侵蚀性降雨底值，侵蚀性降雨雨型与土壤侵蚀量的关系和降雨侵蚀力定量指标及其与土壤侵蚀量的关系，其结构表明，引起土壤侵蚀性降雨底值次降雨量为１０ｍ，Ｉ１０为０．４ｍｍ／ｍｉｎ或Ｉ３０为０．２５ｍｍ／ｍｉｎ。在侵蚀性降雨雨型中，以突发型侵蚀性降雨雨型引起的侵蚀量最大，其次为峰值型 ...
郑粉莉 唐克丽
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Influence of the Rainfall Parameters on the Stability of Landslide Dams [PDF]
, 2014 This study investigates transient seepage using a two-phase flow scheme in finite difference code, FLAC. The saturation of pore water pressure distribution and the stability of the assumed landslide dams are calculated.
Fan-Chieh Yu +7 more
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Shuitu Baochi Xuebao, 2023 为了进一步研究丹江口库区不同降雨类型下植被措施控制土壤侵蚀的效果,以丹江口库区典型生态修复小流域为研究对象,采用坡面径流小区观测法,基于长期野外原位监测的降雨和径流泥沙数据,以裸地为对照,研究不同降雨类型下典型植被恢复措施对坡面产流产沙和土壤侵蚀的影响,分析植被措施的水土保持效应对降雨类型的响应特征。结果表明:(1)中历时、中雨量、小雨强降雨(雨型Ⅲ)是研究区常见的降雨类型,短历时、小雨量、大雨强降雨(雨型Ⅰ)和长历时、大雨量、中雨强降雨(雨型Ⅱ)发生的频率相对较低,但雨型Ⅰ所导致的土壤侵蚀最为严重 ...
杜映妮 +4 more
doaj
Erosive Rainfall Thresholds for Five Typical Soils in Water Erosion Region of China [PDF]
, 2022 [Objective] The practical thresholds separating erosive from non-erosive rainfall events were determined to effectively reduce the workload of soil erosion prediction, and to provide references for regional soil erosion prevention.
Liu Baoyuan +3 more
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