Results 41 to 50 of about 4,299 (163)

以生物多樣性指標評估集水區崩塌地治理優選順序 [PDF]

open access: yes, 2014
The abundance of endemic species in Taiwan is a great natural treasure accomplished by a diverse altitude ranges due to violent tectonic activities and humid tropical weather conditions with ocean surrounded.
Chao-Yuan Lin   +9 more
core  

Rubber plantation size and global rubber price are linked to forest loss and degradation in Jambi, Sumatra 印度尼西亚苏门答腊占碑省的森林丧失和退化与橡胶种植园的面积和全球天然橡胶价格有关 Luas perkebunan karet dan harga karet dunia menjadi penyebab degradasi hutan alam di Jambi, Sumatra

open access: yesIntegrative Conservation, Volume 3, Issue 1, Page 22-35, March 2024.
Rubber plantations that are larger in size and remotely located have a higher probability of being linked to forest loss and degradation. The global rubber price can act as a significant driver of both deforestation and degradation. Identifying high‐risk plantations and mitigating associated threats could help curb future forest loss due to rubber ...
H. Manjari Jayathilake   +4 more
wiley   +1 more source

不同逆坡耕作强度对干热河谷区坡耕地水蚀的影响

open access: yesShuitu Baochi Xuebao, 2020
为了研究不同逆坡耕作强度导致的土壤位移对坡面水蚀的影响,以金沙江干热河谷区坡面径流小区为研究对象,在径流小区5°,10°,15°坡面上,进行单宽流量为0.6 m2/h的放水试验。在10°坡面的下坡位置设置0.05,0.10,0.20 m土层深度,分别代表连续耕作80,69,46年导致下坡位置土壤损失土层变薄情况。通过收集径流小区出口的产流量和产沙量,研究在不同坡度上的不同逆坡耕作强度导致的土壤位移对坡面产流率、产沙率、总流量和总产沙量的影响。结果表明:(1)在10°坡面,耕作年限越长,产流越快 ...
贾立志, 张泽洪
doaj  

On the Causes of landslides in Shinkai Village [PDF]

open access: yes, 2014
This study combines rainfall records, geological surveys, satellite images, and digital terrain model data to explore the possible factors causing landslides in Shinkai.
Chun-Sung Chen   +5 more
core  

黄土丘陵沟壑区坡体稳定性影响因素分析

open access: yesShuitu Baochi Xuebao, 2022
选取黄土丘陵沟壑区纸坊沟小流域为研究区,利用高精度遥感影像(分辨率0.068 m)和DEM (分辨率0.34 m)数据,结合野外调查,对崩塌、滑塌、滑坡、脱落和陷穴等失稳体进行识别,通过统计学、敏感系数方法,利用识别失稳体数据,分析不同类型失稳体空间分布状况,定量研究不同类型失稳体的影响因子敏感程度,揭示不同类型失稳体的主控因子,进一步阐明流域坡体失稳体的空间分布规律和影响坡体稳定性的主控因子。结果表明:(1)利用高精度遥感影像,获取流域失稳体,主要是以小规模和浅层的脱落、崩塌和滑塌为主 ...
张庚, 王志强, 朱喆
doaj   +2 more sources

地图学中“晕滃法”一词的演变与发展 [PDF]

open access: yes, 2013
纵观晕滃法名词的发展,经历了几个阶段:未命名阶段,被称为"某某国之法""测高之法"等;多个名词共用阶段,被称为"疏密界限法""影线""倾斜粗细法";定名阶段,被称为"晕滃法",然后沿用下来 ...
张佳静
core  

UAV Based Agricultural Planning and Landslide Monitoring [PDF]

open access: yes, 2017
Unmanned Aerial Vehicle (UAV) is finding a wide application field in areas such as map production, land survey, landslide, erosion, agricultural activities, and forest fires monitoring.
Susam, Tekin   +2 more
core   +3 more sources

雨强和坡度对嵌套砾石红壤坡面产流产沙的影响

open access: yesShuitu Baochi Xuebao, 2018
采用人工模拟降雨的方法研究了嵌套砾石红壤坡面的产流产沙特征,分析了雨强(60,120 mm/h)和坡度(10°,15°,20°,25°)条件下嵌套砾石和无砾石红壤坡面的产流和产沙过程差异。结果表明:(1)产流开始时间T嵌套砾石 < T无砾石,60 mm/h雨强条件下嵌套砾石较无砾石坡面在10°,15°,20°,25°坡度分别延迟4.20,2.95,2.23,1.03 min;(2)坡度相同时,嵌套砾石坡面较无砾石坡面产流率明显减少,但雨强的增大会掩盖嵌套砾石对坡面产流率减小的影响;(3 ...
王蕙, 胡秀君, 山成菊
doaj  

模拟降雨对亚热带阔叶林土壤坡面产沙产流及养分流失的影响

open access: yesShuitu Baochi Xuebao, 2016
采用人工降雨方法,研究了不同降雨强度和坡度对亚热带阔叶林土壤坡面产沙产流及养分流失的影响。结果表明:(1)在不同降雨强度下,初始产流时间随坡度的增加趋于提前,随降雨强度的增大产流时间提前,降雨强度对初始产沙时间的影响大于坡度变化的影响。(2)在同一坡度条件下,产流强度和平均入渗强度随降雨强度的增加而增加;曲线拟合的结果表明产流强度遵循幂函数变化规律,而坡面入渗强度随时间呈对数函数变化。(3)不同降雨强度下,径流量随降雨历时的变化趋势基本一致,径流量均随降雨历时呈“增加—稳定”趋势,在整个降雨过程中 ...
苏忖安, 松同清
doaj  

The further study on the accuracy of DEM terrain representation [PDF]

open access: yes, 2017
2003-2004 > Academic research: refereed > Publication in refereed journalVersion of ...
Shi, WZ, Wan, GX, Zhang, GQ, Zhu, CQ
core  

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