Results 51 to 60 of about 2,179 (143)

七家灣拆壩後之河道演變模式 [PDF]

open access: yes, 2014
This study focused on channel responses one and a half years after dam removal in the Chijiawan Creek and proposed a channel evolution model based on analyses of hydrology, morphology, and images.
Chia-Hao Chang   +5 more
core  

人工模拟降雨条件下紫色土陡坡地侵蚀泥沙变化特征研究

open access: yesShuitu Baochi Xuebao, 2011
基于人工模拟降雨研究了三峡库区25°径流小区侵蚀泥沙对0.285,0.978,1.737 mm/min 3种不同降雨强度的响应特征。结果表明:在降雨过程中径流泥沙量,随产流历时的增加呈现先增加后逐渐减少,最终趋于稳定。侵蚀泥沙峰值量出现的时间随着雨强的增大在整个产流历程中不断提前。坡面径流的累积产沙量随产流历时的增加呈幂函数规律,相同降雨历时大降雨强度的累积产沙量明显高于小降雨强度的累积产沙量。在降雨强度为0.285,0.978,1.737 mm/min时 ...
高敏   +4 more
doaj  

Integration and Application of a Fiber-Optic Sensing System for Monitoring Debris Flows [PDF]

open access: yes, 2014
This study presents an innovative fiber-optic sensing system for monitoring debris flows. The system mainly comprises an interrogator and four fiber Bragg grating accelerometers.
Ching-Jer Huang   +7 more
core  

决策支持系统在长江三峡水库调度中的应用用 [PDF]

open access: yes, 2008
The basic features of decision support system (DSS) for the Three Gorges Reservoir operation is briefly introduced. Based on the hydrology and sediment information system used in the Three Gorges Project and the river network upward the project, the DSS ...
Chen, J, Dai, H, He, W
core  

巨額土砂匯入對和社溪河相演變之影響 [PDF]

open access: yes, 2014
Macro-sediment impulses induced by particular typhoons and rainstorms are the main reason for serious sediment disasters in the Heshe River. For example, the sediment input during Typhoon Morakot in 2009 which accounted for 95.8% of the annual sediment ...
Chun-Hung Wu   +7 more
core  

桑干河流域淤地坝沉积泥沙特征及其来源解析

open access: yesShuitu Baochi Xuebao
[目的] 为查明桑干河流域的泥沙主要策源地和侵蚀产沙变化。[方法] 选取阳原县高墙乡典型淤地坝沉积泥沙为研究对象,利用复合指纹识别技术,测定沉积泥沙及其源地的土壤粒径、SOC、TN、137Cs、低频质量磁化率等9种指纹因子,研究了不同淤积阶段的泥沙策源地及坝控小流域侵蚀产沙演变规律。[结果] (1)沉积泥沙中137Cs平均含量较低,与沟壁土壤无显著差异(p>0.05),但极显著小于林草地和耕地的137Cs含量(p耕地(15.36%±8.46%)>林草地(1.96%±0.33%);(3 ...
谢骁健   +4 more
doaj  

晚清英美地质学教科书的引进——以商务印书馆《最新中学教科书·地质学》为例 [PDF]

open access: yes, 2014
鸦片战争后,地质学这门19世纪新兴的科学通过多种途径传入中国。甲午战争后,近代地质学教科书成为地质学知识传播的主要载体。本文以商务印书馆《最新中学教科书·地质学》(1905年)为例,考察晚清英美地质学教科书的引进情况。通过与赖康忒(Joseph Le Conte,1823~1901年)原著《地质学概要》(A Compend of Geology)初版、修订版的对比研究,指出中文本翻译底本为1898年修订版。分析中文本对原著的增删,探讨其语言特点与译者对术语的处理方式。在分析该书以及同时代其他教科书的同时,
杨丽娟, 韩琦
core  

NETSTARS 模式加入橋墩沖刷功能之研究─以八掌溪為例 [PDF]

open access: yes, 2014
This study applies NETSTARS V3.0 by adding the calculation functions of eighteen pier scour formulas based on a comprehensive literature review to demonstrate local scour mechanisms. The study area is a reach of the Pachang Creek from the Housheng Bridge
Guan-Ming Luo   +5 more
core  

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