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6. Trend and Abrupt Analysis of Rainfall Change During Last 50 Years in the WeiHe Basin

Author

Sun Dongyong and Li Zhi

Subjects
Upstream (petroleum industry), Hydrology, Mann kendall, Geography, Anomaly (natural sciences), Midstream, Structural basin
Abstract

In order to explore the change of 50 years’ rainfall trend and abrupt change in WeiHe Basin, we using the annual rainfall data of 21 important control stations in WeiHe basin from 1960 to 2012 to analyze the changes in the time rainfall and the change trend of the annual rainfall anomaly, and using Kendall - Mann method to test the trend of rainfall in WeiHe Basin. It shows that rainfall rate keeps decreasing during the last 50 years, and the change rate of upstream is generally greater than the midstream and downstream. For mutation years, it occurs in 1970s in downstream, in1970s and 1980s in midstream and in 1990s and after 2000 in upstream. It shows that the change of rainfall in different regions have different performance. From the tendency analysis, we can predict that the whole WeiHe basin will keep a decreasing trend of annual rainfall in the future.

Published
2015

7. Has water-saving irrigation recovered groundwater in the Hebei Province plains of China?

Author

Zhang, Hongbo, Singh, Vijay P., Sun, Dongyong, Yu, Qijun, and Cao, Wei

Subjects
GROUNDWATER analysis, IRRIGATION water, CLIMATE change, WATER supply, SOCIAL development
Abstract

This study performed a quantitative evaluation of the impact of water-saving irrigation on the groundwater regime in the Hebei Province plains area. In this work, the change in groundwater regime and the contributions of precipitation and water-saving irrigation development were investigated. The results indicate that the groundwater overdraft has been mitigated to some extent, mainly due to changes in precipitation and the implementation of water-saving irrigation, with contributions of 64.3% and 35.7%, respectively, when considering only these two factors. Water-saving irrigation is accepted as an important means for reducing groundwater depletion, but should be used in conjunction with other measures. [ABSTRACT FROM PUBLISHER]

Published
2017
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