| 楼兰古河道发现和风蚀地貌吹蚀速率测算 |
| |
| 引用本文： | 李江风.楼兰古河道发现和风蚀地貌吹蚀速率测算[J].地理研究,1991,10(1):86-94. |
| |
| 作者姓名： | 李江风 |
| |
| 作者单位： | 新疆气象研究所 |
| |
| 摘 要： | 本文讨论了楼兰古河道的发现及该地区风蚀速率。
|
| 关 键 词： | 古河道 楼兰 |
| 收稿时间： | 1987-07-02 |
| 修稿时间： | 1990-08-10 |
THE DISCOVER OF THE ANCIENT RIVER CHANNEL IN LOULAN AND THE ESTIMATE OF WIND EROSION RATE OF WIND EROSION LANDFORM |
| |
| Li jiangfeng.THE DISCOVER OF THE ANCIENT RIVER CHANNEL IN LOULAN AND THE ESTIMATE OF WIND EROSION RATE OF WIND EROSION LANDFORM[J].Geographical Research,1991,10(1):86-94. |
| |
| Authors: | Li jiangfeng |
| |
| Institution: | Xinjiang Meteorological Bureau |
| |
| Abstract: | During 1978 and 1980, the author investigated into Loulan two times to and discovered on ancient river channel in the city, and did some measurement on the depth of wind-erosion inside and out side the ancient city.The ancient river channel has been seriously winderoed.It can be discerned that its strike is NS-SE. Once the river flowed into the city from NW and out of the city towords SE, finally contributing to the Lop lake.The width of the remains of the "V"formed river bottom is about 8 m The width of the bank is 2m. The depth of the original river channel was about 2-2.6m. On both sides of the river channel, there is apparent bedding with the inclined angle of 15-20° At the bendings of the channel, the inclined angle of the bedding inside the bank is greater than that out side the bank. Some remains of spiral shells have been'found in the channel. Some carbornised boughs have been found buried under the bottom of the river. Various kinds of pottery fragments, boughs, and tree trunks have been found distributed on both banks. The discovery of the ancient river channel has provided scientific evidence for the study of the life of residents in Loulan at that time, of the arrangement of the city, and of the prosperity and recession of Loulan.To measure and estimate the wind-erosion landform, G poitts have been chosen and 14 azimuths have been measured. The regulation found is. the winb erosion depth on the side against wind is greater than that on the opposite side, outside city greater than inside city,in the direction of NE greater than in the direction of SW.The wind erosion chiefly resnlts from NE wind and SW wind, in addition to low level jet-stream and the sinking energy of high level NK wind.From the measurement, the average wind-erosion rate is 3.5mm/year, with the minimum of 2.4mm/year nd the maximum of 4.7mm/year.The measurement of the wind-erosion depth and the estimate of wind-erosion rate can provide new scientific dasis ror sand-desert control,ecological dalance,and oasicprotection. |
| |
| Keywords: | Ancient river wind erosion rate |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《地理研究》浏览原始摘要信息 |
| 点击此处可从《地理研究》下载免费的PDF全文 |
|
