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| 1956～2004年长江源区河川径流量的变化特征 | |
| 引用本文： | 时兴合,秦宁生,许维俊,杨贵林,刘青春,燕华云,汪青春,冯蜀青.1956～2004年长江源区河川径流量的变化特征[J].山地学报,2007,25(5):513-523. |
| 作者姓名： | 时兴合 秦宁生 许维俊 杨贵林 刘青春 燕华云 汪青春 冯蜀青 |
| 作者单位： | 1. 青海省气候中心,青海,西宁,810001 2. 青海省气象局,青海,西宁,810001 3. 青海省水文水资源勘察局,青海,西宁,810001 |
| 基金项目： | 国家自然科学基金;国家自然科学基金;中国气象局气候变化专项基金 |
| 摘 要： | 利用1956~2004年长江源区水文和气象台站观测的流量、气温、降水资料,用气候诊断方法分析了该地区径流量的季节和年代际变化特征以及突变特点。结果表明:近50 a来长江源区月平均最大、最小和雨季、年及年较差流量均呈减小的趋势,月平均最小和最大流量分别出现在2月和7~8月,20世纪60和80年代的单峰峰值出现在7月,1970年代、1990年代的单峰峰值出现在8月,近14 a直门达水文站年径流共减少了96×108m3。雨季平均流量的距平基本经历了一个"正-负-正-负"的历史变化过程,雨季和过渡季节降水量、季节积雪融水量和高山冰雪融水量所形成的总流量呈下降趋势。枯季和雨季平均流量均经历了3次明显的转折,并具有10~12 a、6~8 a和3 a的共同变化周期。 |
| 关 键 词： | 径流量 变化 特征 研究 长江源区 |
| 文章编号： | 1008-2786-（2007）5-513-11 |
| 修稿时间： | 2006-09-29 |
The Variations Characteristic of the Runoff in the Source Regions of the Yangtze River from 1956 to 2004 |
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| SHI Xinghe,QIN Ningsheng,XU Weijun,YANG Guiling,LIU Qingchun,YAN Huayun,WANG Qingchun,FENG Shuqing.The Variations Characteristic of the Runoff in the Source Regions of the Yangtze River from 1956 to 2004[J].Journal of Mountain Research,2007,25(5):513-523. | |
| Authors: | SHI Xinghe QIN Ningsheng XU Weijun YANG Guiling LIU Qingchun YAN Huayun WANG Qingchun FENG Shuqing |
| Institution: | 1. Climate Center of Qinghai Province, Xining 810001, China; 2. The Meteorological Bureau of Qinghai Province, Xining 810001, China 3. Hydrology and Water Resource Bureau of Qinghai Province, Xining 810001, China |
| Abstract: | Using the material of hydrology in the Source Regions of the Yangtze River and the runoff,the temperature,and the precipitation observed in meteorological stations from1956 to 2004,the intermonthly and interdecadal evolution characteristics of the runoff and the sudden change characteristic in the area are analyzed by the climatic diagnosis method.The result indicates that,for the recent 50 years the monthly mean maximum runoff with the minimum runoff,and the runoff in rainy season,years with range of years runoff appears the reduce(or drop) tendency.The monthly mean maximum runoff and the minimum runoff respectively have appeared in February and July to August,the monthly mean runoff in 1960s and 1980s single peak value have appeared in July,in 1970s and 1990s single peak value have appeared in August,and from 1991 to 2004 the runoff accumulations for the 14 years reduced 9.6 billion m3.The runoff anomaly in rainy season has basically experienced the historical change process of " positive-negative-positive-negative ",and in rainy season and in the transition season the total quantity of the precipitation,the total runoff of the formation season snow melt water amount and the ice-snow melt water amount on the mountains appears the drop tendency.The runoff in dry season and that in rainy season have experienced obvious transition for 3 times respectively.The runoff in dry season and that in rainy season have remarkable cycles for 10~12 years,6~8 years,and 3 years. |
| Keywords: | runoff variations characteristic research the source regions of the Yangtze River |
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