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首页> 外文会议>International Conference on Geoinformatics;Geoinformatics 2012 >Characteristic Analysis of Baseflow Change and Its Response to Global Change in the Upper Reaches of Heihe River Basin,Northwestern China
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Characteristic Analysis of Baseflow Change and Its Response to Global Change in the Upper Reaches of Heihe River Basin,Northwestern China

机译：黑河上游流域基础水量变化特征及其对全球变化的响应

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The recursive digital filter technique was used to separate annual baseflow of main hydrological stations in the Upper Reaches of Heihe River. The methods of moving average, Mann-Kendall abrupt test and wavelet variance were employed to explain the characteristics of the annual change of baseflow and analyze the reasons of change. The results indicated that the Baseflow Index (BFI) were higher and greater than 0.4 in Qilian, Zhamashike and Yinluoxia stations. The notable increase of baseflow was happened in 1979, when there existed the abrupt point in Qilian and Yinluoxia stations. The baseflow changed fluctuantly in Zhamashike station. The periods of baseflow were 11, 6 and 15 years respectively in Qilian, Zhamashike and Yinluoxia stations. The change of baseflow was mainly affected by precipitation. The increase of air temperature causes the glacier to melt and increase runoff, but the change increased evaporation simultaneously, which made the poor correlation between air temperature and baseflow. The influence of human activities on baseflow was another factor. The forest areas were decreased by human activities, which made the capacity of recharging and adjusting baseflow was decline. In turn, the baseflow went down and more influenced by climatic change. The baseflow change characteristics showed the consistency with the response of northwest China to the global climate change. While the otherness to the global climate change also existed.
机译：用递归数字滤波技术分离黑河上游主要水文站的年基流量。采用移动平均法，Mann-Kendall突变法和小波方差法解释了基流年变化的特征，并分析了变化的原因。结果表明，祁连站，扎马什克站和银螺峡站的基流指数（BFI）均大于和大于0.4。 1979年发生了显着的基流增加，当时祁连站和银螺峡站都存在突变点。 Zhamashike站的基础流量波动较大。祁连，扎哈玛什克和银螺峡站的基流期分别为11、6和15年。基流的变化主要受降水影响。空气温度的升高导致冰川融化并增加了径流，但变化同时增加了蒸发，这使得空气温度与基流之间的相关性较差。人类活动对基流的影响是另一个因素。森林面积因人为活动而减少，补给和调节基流的能力下降。反过来，基本流量下降了，并且受气候变化的影响更大。基流变化特征与西北地区对全球气候变化的响应具有一致性。与全球气候变化的对立面也存在。

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