气候变化领域集成服务门户(CCPortal): Study on the runoff and sediment-producing effects of precipitation in headwater areas of the Yangtze River and Yellow River, China

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DOI	10.1007/s00254-007-1134-7
	Study on the runoff and sediment-producing effects of precipitation in headwater areas of the Yangtze River and Yellow River, China
	Li Yuanshou; Wang Genxu; Qin Dahe; Zhao Lin; Ding Yongjian
发表日期	2008
ISSN	0943-0105
起始页码	1
结束页码	9
卷号	56 期号:1
英文摘要	Natural runoff observation fields with different vegetation coverage were established in the Zuomaoxikongqu River basin in the headwater area of the Yangtze River, and in the Natong River basin and the Kuarewaerma River basin in the headwater area of the Yellow River, China. The experiments were conducted using natural precipitation and artificially simulated precipitation between July and August to study the runoff and sediment-producing effects of precipitation under the conditions of the same slope and different alpine meadow land with coverage in the headwater areas. The results show that, in the three small river basins in the headwater areas of the Yangtze and the Yellow Rivers, the surface runoff yield on the 30 slope surface of the alpine meadow land with a vegetation cover of 30% is markedly larger than that of the fields with a vegetation cover of 95, 92, and 68%. Furthermore, the sediment yield is also obviously larger than the latter three; on an average, the sediment yield caused by a single precipitation event is 2-4 times as large as the latter three. Several typical precipitation forms affecting the runoff yield on the slope surface also influence the process. No matter how the surface conditions are; the rainfall is still the main precipitation form causing soil erosion. In some forms of precipitation, such as the greatest snow melting as water runoff, the sediment yield is minimal. Under the condition of the same precipitation amount, snowfall can obviously increase the runoff yield, roughly 2.1-3.5 times as compared to the combined runoff yield of the Sleet or that of rainfall alone; but meanwhile, the sediment yield and soil erosion rate decrease, roughly decreasing by 45.4-80.3%. High vegetation cover can effectively decrease the runoff-induced erosion. This experimental result is consistent in the three river basins in the headwater areas of the Yangtze and Yellow Rivers.
英文关键词	Headwater areas of the Yangtze River and Yellow River; Vegetation coverage; Precipitation; Runoff yield; Sediment yield
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL GEOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158674
作者单位	Li, YS (corresponding author), Chinese Acad Sci, Cryosphere Res Stn Qinghai Xizang Plateau, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Li Yuanshou,Wang Genxu,Qin Dahe,et al. Study on the runoff and sediment-producing effects of precipitation in headwater areas of the Yangtze River and Yellow River, China[J],2008,56(1).
APA	Li Yuanshou,Wang Genxu,Qin Dahe,Zhao Lin,&Ding Yongjian.(2008).Study on the runoff and sediment-producing effects of precipitation in headwater areas of the Yangtze River and Yellow River, China.ENVIRONMENTAL GEOLOGY,56(1).
MLA	Li Yuanshou,et al."Study on the runoff and sediment-producing effects of precipitation in headwater areas of the Yangtze River and Yellow River, China".ENVIRONMENTAL GEOLOGY 56.1(2008).