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| 青海湖湖岸形态变化及成因分析 | |
| 引用本文： | 李凤霞,伏洋,李凤霞,伏洋,李凤霞,伏洋,李林,沈芳.青海湖湖岸形态变化及成因分析[J].资源科学,2004,26(1):38-44. |
| 作者姓名： | 李凤霞 伏洋 李凤霞 伏洋 李凤霞 伏洋 李林 沈芳 |
| 作者单位： | 1. 青海省遥感中心,西宁,810001;青海省气象科学研究所,西宁,810001 2. 青海省气候资料中心,西宁,810001 3. 华东师范大学,上海,200062 |
| 摘 要： | 青海湖在1975年～2000年的25年间,湖岸形态发生了较大变化,西岸和北岸陆地相对推进距离分别达到1 566.3m和3 266.9m,年平均推进距离分别为62.6m和130.6m;湖区东岸沙体形似"鸟嘴"侵蚀东岸湖水,近100 km2的水体被分离,只有很窄的河道连通湖区,且"鸟嘴"有继续延伸趋势.造成湖岸形态变化的主要原因是气候暖干化、湖水位下降、土地沙漠化和人类活动的共同影响.青海湖环湖地区气候暖干化导致的青海湖水位下降和土地沙漠化是造成湖岸变化的的直接成因;人类活动引起的草场退化则进一步加速了湖岸的变化. |
| 关 键 词： | 青海湖 湖岸形态变化 气候暖干化 草场退化 |
| 文章编号： | 1007-7588(2004)01-0038-07 |
| 收稿时间： | 1/1/1900 12:00:00 AM |
| 修稿时间： | 2003年6月30日 |
Evolution of Lakeshore Shape of Qinghai Lake and its Causes |
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| LI Feng-xia.Evolution of Lakeshore Shape of Qinghai Lake and its Causes[J].Resources Science,2004,26(1):38-44. | |
| Authors: | LI Feng-xia |
| Institution: | LI Feng-xia~ |
| Abstract: | From 1975 to 2000, the lakeshore shape of Qinghai Lake had changed much. The relative advance distances are 1566.3m and 3 266.9m respectively on west and north bank,its average advance distances are 62.6m/a and 130.6m/a respectively. The sand body on east bank is eroding the lake with a shape of "beak", the water body about 100km~2 will be separated, and there is only a strait river way connecting with the lake region, the "beak" has an outspread trend. Warm and dry climate, water level declined, desert land and human activity are the primary reasons of this evolution. Climatic change around Qinghai Lake is the direct cause of aspect variation along the coast line of lake, while climatic warming and drying, which results in falling of water level, land desertification and grassland degeneration are the indirect causes of its variation. Human activities have an indirect influence on its variation through grassland, land and water utilization. |
| Keywords: | Qinghai Lake Evolution of Lakeshore shape Warm and dry climate Grassland degeneration |
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