Responses of streamflow and sediment load to climate change and human activity in the Upper Yellow River, China: a case of the Ten Great Gullies Basin.
Responses of streamflow and sediment load to climate change and human activity in the Upper Yellow River, China: a case of the Ten Great Gullies Basin.
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DOI：
10.2166/wst.2015.167
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发表时间：
2015-06
期刊：
影响因子：
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通讯作者：
Tong-huan Liu;H. Huang;M. Shao;W. Yao;J. Gu;Guoan Yu
中科院分区：
文献类型：
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作者：
Tong-huan Liu;H. Huang;M. Shao;W. Yao;J. Gu;Guoan Yu
水土流失和土地荒漠化是全球最严重的环境问题。研究了黄河上游十大沟区1964 - 2012年的水沙变化。1997-1998年，两条典型沟的径流量和输沙量均发生了显著的下降，这一趋势的逐步检验（Mann-Kendall检验）和突变检验（Pettitt检验）表明，径流量和输沙量均发生了显著的下降。变化点前后的气候变异性比较显示，年降水量和潜在蒸散量没有统计上显着的趋势。人类活动在该地区非常活跃，1990-2010年期间，146.01和197.62平方公里的土地分别被转化为森林和草地，分别增加了87.56%和77.05%。此外，在十大沟上游还修建了大量淤地坝。这些措施可能是造成过去49年来年径流量和泥沙量显著下降的原因。
Soil erosion and land desertification are the most serious environmental problems globally. This study investigated the changes in streamflow and sediment load from 1964 to 2012 in the Ten Great Gullies area of the Upper Yellow River. Tests for gradual trends (Mann-Kendall test) and abrupt changes (Pettitt test) identify that significant declines in streamflow and sediment load occurred in 1997-1998 in two typical gullies. A comparison of climatic variability before and after the change points shows no statistically significant trends in annual precipitation and potential evapotranspiration. Human activities have been very active in the region and during 1990-2010, 146.01 and 197.62 km2 of land were converted, respectively, to forests and grassland, with corresponding increases of 87.56 and 77.05%. In addition, a large number of check dams have been built up in the upper reaches of the ten gullies. These measures were likely responsible for the significant decline in the annual streamflow and sediment load over the last 49 years.