Results 51 to 60 of about 17,994 (170)

Ecology, status, and distribution of Temminck's pangolin (Smutsia temminckii) in Hwange National Park 万基国家公园南非地穿山甲 (Smutsia temminckii) 的生态、现状和分布

open access: yesWildlife Letters, Volume 2, Issue 1, Page 17-22, March 2024.
Temminck's pangolin faces conservation threats, mainly habitat fragmentation, poaching, and trafficking. The study assessed the ecology, status, and distribution of Temminck's pangolin in Hwange National Park and directly sighted seven specimens. Biotic and abiotic factors influence pangolin distribution inside and outside protected areas.
Kelly Sabashau   +4 more
wiley   +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  

[[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  

An experimental study on the characteristics of soil water movement in unsaturated sand during and after a rain [PDF]

open access: yes, 1983
Thesis--University of Tsukuba, D.Sc.(B), no. 120, 1983.
Kaihotsu Ichiro   +2 more
core  

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

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  

地下水引發自由端順向坡土體滑動特性分析 [PDF]

open access: yes, 2014
Retrogressive sliding can be observed in groundwater-induced landslides. The major inducing factor of this phenomenon is the fluidization in the down-hillslope and the soil of the bottom-layers.
Chun-Hung Wu   +5 more
core  

Macropore effect on infiltration process and soil air movement [PDF]

open access: yes, 1995
Thesis (Ph.D. in Science)--University of Tsukuba, (B), no.
Yasuike Shinji, 安池 慎治
core  

枣树冠层改变降雨截留历时过程同位素和化学特征

open access: yesShuitu Baochi Xuebao, 2017
基于冠层截留历时过程降雨同位素和化学特征的研究很少,但却有助于揭示冠层截留特征及其对降雨同位素和化学特征的影,于2016年9月17—18日和10月22—23日对黄土高原丘陵沟壑区的2场降雨事件林外降雨、穿透降雨和树干茎流历时过程进行连续采样及室内分析,研究降雨过程中矮化枣树冠层截留对降雨同位素和化学成分的改变、2016年7—10月4棵矮化枣树树干茎流以及林外降雨取样测定,分析矮化枣树形态特征对其树干茎流率的影响。结果表明:(1)矮化枣树树干茎流率可达2.3%~5.6%,2场降雨事件中当降雨量分别达到1 ...
陶 泽, 司炳成, 靳静静
doaj  

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