Results 51 to 60 of about 185 (113)
Driving factors analysis of surface soil moisture variation in Zhangjiakou-Chengde district based on geodetector [PDF]
As an important water conservation and sand-windy barrier, Zhangjiakou and Chengde (Zhang-Cheng) district of Hebei Province is very important for ecological protection in the Beijing-Tianjin-Hebei region.
Aifang JIN +4 more
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Shuitu Baochi Xuebao, 2001 在干旱半干旱区植被生态建设过程中 ,需要进行决策并经常引起争论的问题是 ,应该选择哪种类型植被 ,才能获得最大的防风效应。为比较不同防风材料降低风速效应的差异 ,在春季大风天气 ,选取毛乌素沙地 5种常见的灌草乔植物和 2种常见的人工防风材料栅格沙障和栅栏 ,进行防风性能野外实地观测。分析结果表明 ,几种防风材料降低风速性能从大到小的次序为 :沙蒿 >芨芨草 >杨柴和牛心朴子 >沙障 >栅栏 >旱柳 ,沙蒿性能最好 ,降低风速比率达到 0 .49,旱柳性能最差 ,近似为 0 ;就乔、灌、草植被类型而言 ,
黄富祥 高琼
doaj
Distribution characteristics and influencing factors of iron-rich groundwater in Xining City [PDF]
Groundwater is an important water supply source in Xining City. Previous works have found that iron-rich groundwater limits water development and utilization.
Bei LI +11 more
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Spatial-temporal heterogeneity of landscape ecological risk in Yushenfu Mining Area from 1995 to 2021 [PDF]
As a strong human disturbance, coal mining has affected the ecosystem service function and economic value on mining area. However, there is a lack on the comparing for the long-term spatial scale evolution of landscape ecological risk after mining ...
Benyan NING +4 more
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Effect of coal mining on net primary productivity of vegetation in Shendong Mining Area [PDF]
Coal mining in Shendong Mining area has an important impact on the local ecological environment, especially the growth of vegetation. In order to describe this effect quantitatively, this study uses a regional evapotranspiration model to calculate the ...
Bingqian LI +9 more
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Shuitu Baochi Xuebao, 2007 选择毛乌素地区东北部梁地上3种类型的小叶杨人工林,研究了坡位对其生长和土壤养分空间差异的影响。结果表明:整体上,坡位对小叶杨和沙柳的生长均有显著影响。小叶杨人工林植被生长均表现为:坡底>坡顶≥坡中,小叶杨和柠条的混交林比其他两个林型生长好。小叶杨人工林土壤有机质含量在坡底部位多数土层中含量较高,在0.57%~1.09%之间,坡中和坡顶部位含量较小,分别在0.36%~1.07%和0.32%~0.82%之间,这与植被生长较好密切相关;土壤有机质含量在不同坡位均呈波动式减少的趋势,0~10 ...
刘鑫, 满秀玲, 陈立明, 李文影
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An integrated ecosystem monitoring technology for coal mining subsidence areas and its application in the Shendong mining area [PDF]
BackgroundThe ecosystem monitoring of arid and semi-arid coal mining subsidence areas acts as a significant prerequisite for regional ecosystem conservation and management, holding critical significance for accelerating green mine construction ...
Chengye ZHANG +6 more
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River-groundwater transformation and ecological effects in the Tuwei River watershed [PDF]
The Tuwei River, an important tributary of the Yellow River, located in the eastern Jiziwan region exhibits a close hydraulic connection between atmospheric precipitation, groundwater, and river-lake water in the watershed. This connection influences the
Fan GAO +5 more
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Shuitu Baochi Xuebao, 2018 利用钻探和抽水试验资料，结合遥感资料和植被实地样方调查资料，分析了该区地下水富集特征和开发利用对生态环境的影响。结果表明：含水层的厚度是地下水富集的主控因素，二者呈正相关关系；基底古凹陷分布区含水层厚度较大，是地下水的富集区；埋深3 m是滩地地下水开采的约束水位，过量的开采可能造成湖盆滩地植被向沙地植被的演替或退化，甚至消亡，加快沙漠化进程；地下水开采对沙地、沙丘生长的耐干旱植被物种的影响较小。研究结果可为该区内水源地选址、地下水合理开发利用、水土保持和生态环境保护提供基础理论和数据。
范磊, 侯光才, 陶正平
doaj
[Analysis of inhalation allergen of patients with allergic rhinitis in Shenzhen]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2022 Zhang N, Wu Y, Zhang Q, Wei Z, Liu Y.
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