Results 51 to 60 of about 23,159 (150)

RESEARCH ON IMPROVEMENT OF FLEXIBLE DAM OPERATION BASED ON EXTENDED FORECAST RAINFALL [PDF]

open access: yes, 2014
This study investigates small-scale hydropower generation utilizing the dam water currently released solely for maintaining the river discharge. Toward improving such small-scale hydropower generation, a method for flexible operation of dams is proposed.
中津川 誠   +2 more
core   +2 more sources

Influence of the Rainfall Parameters on the Stability of Landslide Dams [PDF]

open access: yes, 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
core  

渭河流域降雨与降雨侵蚀力变化的原因分析

open access: yesShuitu Baochi Xuebao, 2018
研究降雨与降雨侵蚀力的时空变化特征及其原因对流域土壤侵蚀监测、评估、预报和治理具有重要意义。以干旱半干旱的渭河流域为研究对象,采用Mann-Kendall检验分析了降雨与降雨侵蚀力的变化趋势;采用启发式分割法对流域降雨量与降雨侵蚀力进行了变异诊断;采用交叉小波分析探究了ENSO(厄尔尼诺-南方涛动)、北极涛动、太阳黑子与降雨以及降雨侵蚀力的联系。结果表明:(1)降雨和降雨侵蚀力均呈下降趋势;(2)华山站和西吉站的降雨量存在变异点,华山站和临洮站的降雨侵蚀力存在变异点 ...
马 岚   +5 more
doaj  

[[alternative]]The Fractal Analysis and Scale Modeling for the Extreme Rainfall in Taiwan [PDF]

open access: yes
計畫編號:NSC93-2211-E032-006研究期間:200408~200507研究經費:366,000[[abstract]]一般水文頻率分析理論係假設水文極端事件之發生乃遵循某特定機率分 布,亦即利用機率分佈來描述極端事件的特性。於1996 年Burlando 以及Rosso 則提出尺度分析的方法,並建立降雨極端事件之單尺度與複尺度模式。 Menabde(1999) 及Veneziano(2002) 等人則對降雨強度- 延時- 頻率 (intensity-duration-frequency ...
虞國興
core  

IMPROVEMENT OF DAM FLOOD CONTROL BY CONSIDERING THE WATER STORAGE CAPACITY OF A WATERSHED [PDF]

open access: yes, 2010
It is necessary to clarify the long-term water balance in an entire watershed, because flood runoff patterns strongly depend on the water storage capacity of the watershed.
中津川 誠   +2 more
core   +1 more source

太行山土石山区侵蚀性降雨对典型植物措施产流产沙的影响

open access: yesShuitu Baochi Xuebao, 2017
通过对山西省长治市白马小流域的1个标准小区和4个植物措施小区近5 a(2006—2010年)的降雨和径流泥沙观测,研究太行山土石山区的降雨特征以及不同类型降雨对典型植物措施小区径流泥沙的影响。结果表明:(1)太行山土石山区侵蚀性降雨主要集中于5—8月份,7—8月份侵蚀性降雨次数占侵蚀性降雨总次数的54.55%,侵蚀性降雨量占侵蚀性降雨总量的61.19%,故该时期是防治水土流失的关键时期;(2)径流量R与降雨量P、最大30 min降雨强度I30、降雨量和最大30 min降雨强度的乘积PI30呈正相关且在0.
  +5 more
doaj  

喀斯特土石异质坡面产流产沙规律

open access: yesShuitu Baochi Xuebao, 2022
侵蚀性降雨是引起喀斯特黄壤坡面水土流失的主要动力因子。采用贵州省遵义市浒洋水流域2018—2020年4个径流小区92次侵蚀性降雨产流产沙实测数据,研究次降雨条件下,裸露坡面和块石出露小区对产流产沙的影响。结果表明:(1)侵蚀性降雨可以分为A、B、C 3类,A类降雨是造成喀斯特黄壤坡面土壤侵蚀的主要雨型。侵蚀性降雨的标准为次降雨量>6.6 mm或I30>3.6 mm/h。(2)裸露坡面63.27%的侵蚀性降雨径流深<0.4 mm,66.30%的侵蚀性降雨土壤流失量<1 g/m2 ...
陈磊   +5 more
doaj  

Role of entrapped pore air in rainfall-runoff process in a small headwater catchment underlain by volcanic rock [PDF]

open access: yes, 2013
Thesis (Ph. D. in Science)--University of Tsukuba, (A), no. 6479, 2013.3.25Includes bibliographical references (p.
岩上 翔
core  

降雨型滑坡时间概率的逻辑回归拟合及连续概率滑坡危险性建模

open access: yesEarth Science-Journal of China University of Geosciences, 2022
Faming Huang   +4 more
semanticscholar   +1 more source

滇中高原常绿阔叶林对天然降雨雨滴动能的影响

open access: yesShuitu Baochi Xuebao, 2018
为探究滇中高原优势群落常绿阔叶林植被对降雨雨滴动能的影响,于2016年和2017年5—9月,在天然降雨条件下运用自计雨量计和滤纸色斑法,通过定位监测磨盘山常绿阔叶林林外降雨和林内穿透雨特征及其雨滴特性,针对不同降雨条件研究了常绿阔叶林对雨滴动能等特征的影响。结果表明:林外的雨滴个数比林内降雨的雨滴个数多61.7%;随着雨量的增大,雨滴直径分布规律也呈逐渐增大的趋势;在小雨条件下,
曹光秀, 赵洋毅, 段旭, 薛杨
doaj  

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