Hydrological change driven by human activities and climate variation and its spatial variability in Huaihe Basin,China |
| |
| Authors: | Shulei Zhang Dawen Yang AW Jayawardena Xiangyu Xu Hanbo Yang |
| |
| Institution: | 1. State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, Chinayangdw@tsinghua.edu.cn;3. State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, China;4. Department of Civil Engineering, The University of Hong Kong, Hong Kong, China, and, Research and Development Centre, Nippon Koei Co. Ltd., Tsukuba, Japan |
| |
| Abstract: | ABSTRACTThis study investigated the impacts of human activities, especially water resources development, and climate variation on the runoff reduction and its spatial variability in the Huaihe Basin, the sixth largest river basin in China, which is also an important agricultural area in Eastern China. The annual runoff had statistically negative trends at all hydrological stations located on the main river and the major tributaries, which ranges from ?0.13 to ?1.99 mm year-1. The Budyko-based approach was employed to quantitatively differentiate the runoff reduction driven by human activities and climate variation. Results showed that the precipitation decrease contributed to the runoff reduction in all study sub-catchments. However, significant reductions of the annual runoff in some sub-catchments were mainly caused by the human activities rather than the precipitation decrease. Spatial variability of hydrological changes were closely related to different types of human activities especially irrigation and water diversion. In the southern sub-catchments, water diversion played a significant role in runoff reduction, while agriculture irrigation was the relatively dominant driving factor in the northern sub-catchments. The results show the complexity in the catchment hydrological response to the changes in climate forcing and human water resources development and the effectiveness of the Budyko-based approach for attribution analysis. Editor D. Koutsoyiannis; Associate editor C. Cudennec |
| |
| Keywords: | runoff decrease spatial variability of hydrological change human water resources development climate variation Budyko-based approach |
|
|
