期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
也谈河面上漂浮物体的运动问题——与张大明同志商榷
1
作者 方振凤 《新乡师范高等专科学校学报》 1999年第3期 83-84,共2页
关键词 河面上漂浮物体 运动 加速度运动 下滑运动
下载PDF
Effects of Vegetation Type on Surface Elevation Change in Liaohe River Delta Wetlands Facing Accelerated Sea Level Rise 被引量:5
2
作者 WANG Guodong WANG Ming +3 位作者 JIANG Ming LYU Xianguo HE Xingyuan WU Haitao 《Chinese Geographical Science》 SCIE CSCD 2017年第5期810-817,共8页
Rising sea levels threaten the sustainability of coastal wetlands around the globe. The ability of coastal marshes to maintain their position in the intertidal zone depends on the accumulation of both organic and inor... Rising sea levels threaten the sustainability of coastal wetlands around the globe. The ability of coastal marshes to maintain their position in the intertidal zone depends on the accumulation of both organic and inorganic materials, and vegetation is important in these processes. To study the effects of vegetation type on surface elevation change, we measured surface accretion and elevation change from 2011 to 2016 using rod surface elevation table and feldspar marker horizon method (RSET-MH) in two Phragmites and two Suaeda marshes in the Liaohe River Delta. The Phragmites marshes exhibited higher rates of surface accretion and elevation change than the Suaeda marshes. The two Phragmites marsh sites had average surface elevation change rates at 8.78 mm/yr and 9.26 mm/yr and surface accretion rates at 17.56 mm/yr and 17.88 mm/yr, respectively. At the same time, the two Suaeda marsh sites had average surface elevation change rates at 5.77 mmJyr and 5.91 mm/yr and surface accretion rates at 13.42 mm/yr and 14.38 mm/yr, respectively. The elevation change rates in both the Phragmites marshes and the Suaeda marshes in the Liaohe River Delta could keep pace and even continue to gain elevation relative to averaged sea level rise in the Bohai Sea reported by the 2016 State Oceanic Administration, Peo- ple's Republic of China projection (2.4-5.5 mm/yr) in current situations. Our data suggest that vegetation is important in the accretionary processes and vegetation type could regulate the wetland surface elevation. However, the vulnerability of coastal wetlands in the Liaohe River Delta need further assessment considering the accelerated sea level rise, the high rate of subsidence, and the declining sediment delivery, especially for the Suaeda marshes. 展开更多
关键词 sea level rise wetland elevation surface accretion Phragmites marsh Suaeda marsh Liaohe River Delta
下载PDF
最忆儿时居
3
作者 伍依依 童富英(指导) 《小学生优秀作文(高年级版)》 2017年第10期46-47,共2页
风吹过来了,柳条飘动,婀娜的舞姿,是那么美,那么自然。溪两岸的柳树,拂动着新生的柔软的枝条,倒映在河面上,使溪水也染上了绿色,仿佛一河翡翠向东奔流。伴随着的是阵阵花香,迎春花、野蔷薇摇来晃去,是在跳春之舞吧。小鸟也不甘寂寞,热... 风吹过来了,柳条飘动,婀娜的舞姿,是那么美,那么自然。溪两岸的柳树,拂动着新生的柔软的枝条,倒映在河面上,使溪水也染上了绿色,仿佛一河翡翠向东奔流。伴随着的是阵阵花香,迎春花、野蔷薇摇来晃去,是在跳春之舞吧。小鸟也不甘寂寞,热情地给花儿们伴奏。来,听.来,看.这就是我长大的地方——大佳何镇伍家村。一块块石头搭在溪上,弯弯曲曲,通向对面的田野。溪流离村口不远,一进村口,就能看到一条小溪和她的柳树朋友。 展开更多
关键词 热情 舞姿 枝条 溪流 家村 溪水 河面上 对面 村口 野蔷薇
原文传递
中年的雪(外二章)
4
作者 亚男 《伊犁河》 2018年第4期93-94,共2页
我遇到的冷,在雪的外部。远远地看到,一条街窈窕在晚霞中。突然而至的雪,开始是小片小片的。紧随着,屋顶上就留下了我想象的白。她写下,'我打开的雪,只有一片'。夹杂的红润和细腻,饱满着。修长的字体,有着中年的成熟和知性。河... 我遇到的冷,在雪的外部。远远地看到,一条街窈窕在晚霞中。突然而至的雪,开始是小片小片的。紧随着,屋顶上就留下了我想象的白。她写下,'我打开的雪,只有一片'。夹杂的红润和细腻,饱满着。修长的字体,有着中年的成熟和知性。河面上,是结冰的往事。眼眸点燃,雪在我的唇齿间,喘息。我听到了千军万马。刀剑相接,山峦一望无际。 展开更多
关键词 结冰 知性 一条街 山峦 小片 眼眸 河面上 晚霞 唇齿
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部