Journal
HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES
Volume 60, Issue 2, Pages 234-246Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02626667.2013.865029
Keywords
human activities (HA); runoff variation; Chao River; climate change (CC); separation
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Funding
- General Programme of National Natural Science Foundation of China [41271414]
- National Science and Technology Pillar Programme of China [2012BAK12B03]
- Young-people-cultivation Project of the State Key Laboratory of Remote Sensing Science, China [14RC-09]
- Education Department of Shaanxi Province [12JS068]
- Fundamental Research Funds for the Central Universities, China
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A practical approach to separate the impact of the processes of climate change (CC) and human activities (HA) on streamflow is presented. A non-parametric Mann-Kendall-Sneyers test, combined with moving t test and Yamamoto methods, was used to recognize abrupt change points in the runoff time series to determine a baseline period. A new algorithm to separate CC and HA influence on streamflow was deduced based on the climate elasticity concept. Application to the Chao River, China, shows that CC imposed a positive impact on streamflow in this region (25%, on average), while HA exerted a continuous negative impact of -75% in the period after the 1950s. These results are of great use in understanding the variation of CC and HA impacts under different human development patterns. [GRAPHICS] Editor Z.W. Kundzewicz; Associate editor H. Aksoy
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