Impact of climate change and human activity on the runoff of Wei River basin to the Yellow River
Impact of climate change and human activity on the runoff of Wei River basin to the Yellow River
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发表时间：
2007
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通讯作者：
Cao Hong-xia
中科院分区：
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作者：
Cao Hong-xia
根据渭河流域气温、降水、径流、用水量、水土保持面积等资料，采用回归分析方法，研究了气候变化和人类活动对渭河流域入黄径流的影响。采用Kendall等级相关法检验气候因子的变化趋势。选择降水作为气候变化的影响因子，以及渭河沿岸水土保持、地表水消耗、地下水开采等强化河道对地下水的补给。结果表明，不同产流区降水变化对黄河入库径流量的影响不同。与多年平均径流量相比，1990年S年平均径流量减少29.04×108m~3，年平均降雨量减少10.4%，径流量减少68.2%。其中，人类活动、水土保持、地表水消耗、地下水开采和雨水收集等因素造成的径流量减少11.8%。径流量分别减少10.1%、9.8%和0.2%。
Based on the data of temperature,precipitation,recorded runoff,water consumption and area of water and soil conservation,the impact of climate change and human activities on the runoff of Wei River basin to the Yellow River was studied according to the use of the regression method.The method of Kendall's rank correlation was applied to test the trend of climate factors.Precipitation was selected as the factor of climate change,and water and soil conservation,surface water consumption,groundwater exploitation around bank side of Wei River which intensify the replenishment of the river water to groundwater,and rainwater collection were selected as the factors of human activity.The results show that the changes of precipitation from different areas of runoff generating have different impacts on the runoff to the Yellow River.Compared with average annual runoff in many years,the average annual runoff in 1990's decreased 29.04×108 m3.The average annual precipitation decreased 10.4%,which resulted in the runoff decreased of 68.2% of total decreased runoff.And the decreased runoff amounts resulting from the human activity,factors of water and soil conservation,surface water consumption,groundwater exploitation and rainwater collection were 11.8%,10.1,9.8% and 0.2% of total runoff deceased respectively.