| 查看: 602 | 回复: 1 | ||
| 本帖产生 1 个 翻译EPI ，点击这里进行查看 | ||
xichong新虫 (小有名气)
|
[求助]
摘要，润色！需要英文比较专业顺溜的，谢谢！
|
|
| Abstract: By taking two sand shadow dune groups in Shigatse and Za’gya Zangbo in Tibet and one individual dune in Da Qaidam in Qinghai as research objects, this paper analyzes their topographies, and morphologies, and the physical characteristics of the sand, wind regimes, and sand transport. These dunes, formed under harsh conditions behind hills, are mature sand shadow dunes, which are hundreds of meters long, have great linear sand dunes with significant ridges and crescent dunes downwind, and formed behind hills. Additionally they are formed under harsh conditions, with a hill pass on one or both sides. According to wind tunnel experiments, the hill gap and wind velocity are important for the formation of such sand shadow dunes. Only when the gap spacing is 2/3 the hill height, it is most suitable for their formation. When wind velocity is 20 m/s, the sand body will be divided into two parts, which will form the sand shadow dunes behind the hill body. The hill pass allows the transport of wind and sand, creating a “narrow-pipe effect”, which causes the transported material to accumulate gradually in the center of the shadow zone. We observed that the following conditions are necessary for sand shadow dunes to form: (1) strong winds, sufficient sand, suitable obstacles, and a dry climate; (2) one or both sides of the obstacle forming the shadow zone has a hill pass, which allows the passage of wind and sand; and (3) the windward side of the obstacle has a wide, flat area, which provides adequate spacing for the wind flow and transport of sand material, and the leeward side also has a sufficiently broad, flat area to allow the release of the wind and transported sand. Research on these dunes, newly discovered on the Tibetan Plateau, could greatly contribute to the understanding of dune geomorphology. |
回复此楼» 猜你喜欢
一志愿北交大材料工程总分358求调剂
已经有4人回复
-
考研生物学考A区211，初试322，科目生化和生物综合，求调剂
已经有5人回复
-
284求调剂
已经有12人回复
-
329求调剂
已经有19人回复
-
材料专硕(0856) 339分求调剂
已经有9人回复
-
工科277分求调剂材料
已经有9人回复
-
085602调剂 初试总分335
已经有6人回复
-
调剂
已经有3人回复
-
315求调剂
已经有11人回复
-
298分 070300求调剂
已经有15人回复
phu_grassman
荣誉版主 (知名作家)
快乐岛、布吉岛岛主
- 翻译EPI: 265
- 应助: 7 (幼儿园)
- 贵宾: 1.392
- 金币: 7538.7
- 散金: 11599
- 红花: 107
- 沙发: 11
- 帖子: 5611
- 在线: 1480.2小时
- 虫号: 1151372
- 注册: 2010-11-20
- 专业: 电化学
- 管辖: English Cafe
【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
RXMCDM: 金币+2 2014-05-04 00:06:31
真强必胜: 金币+1, thanks 2014-05-06 14:40:20
xichong: 金币+10, 翻译EPI+1, 谢谢你，虽然我没有采纳，还是表示感谢！ 2014-05-06 17:26:35
RXMCDM: 金币+2 2014-05-04 00:06:31
真强必胜: 金币+1, thanks 2014-05-06 14:40:20
xichong: 金币+10, 翻译EPI+1, 谢谢你，虽然我没有采纳，还是表示感谢！ 2014-05-06 17:26:35
|
Abstract: Two sand shadow dune groups in Shigatse and Za’gya Zangbo in Tibet, respectively, and one individual dune in Da Qaidam in Qinghai were chosen as research objects in this paper. The topographies, morphologies, and physical characteristics of the sand, wind regimes, and sand transport were analyzed. These dunes, formed under harsh conditions behind hills, are mature sand shadow dunes. They are hundreds of meters long and have great linear sand dunes with significant ridges and crescent dunes downwind, and form behind hills. Additionally, they are formed under harsh conditions, with a hill pass on one or both sides. According to wind tunnel experiments, the hill gap and wind velocity are critical for the formation of such sand shadow dunes. A gap spacing of 2/3 of the hill height is most suitable for their formation. When the wind velocity is 20 m/s, the sand body will be divided into two parts, which will form the sand shadow dunes behind the hill body. The hill pass allows the transport of the wind and sand, creating a “narrow-pipe effect”, which can cause the transported material to accumulate gradually in the center of the shadow zone. We observed that the following conditions are necessary for the forming of sand shadow dunes: (1) strong wind, sufficient sand, suitable obstacles, and dry climate; (2) one or both sides of the obstacle forming the shadow zone has a hill pass, which allows the passage of the wind and sand; and (3) the windward side of the obstacle has a wide and flat area, which can provide adequate spacing for the wind flow and transport of the sand material, and the leeward side also has a sufficiently broad and flat area to allow the release of the wind and transported sand. Research on these dunes, newly discovered on the Tibetan Plateau, could greatly contribute to the understanding of dune geomorphology. |
2楼2014-05-03 20:16:41
