FANG Sida, LIU Min, REN Yongjian. Drought and Waterlogging Characteristics and Risk Prediction in Different River Basin Areas of Middle Route of South-to-North Water Transfer Project[J]. Bulletin of Soiland Water Conservation, 2018, 38(6): 263-267.
DOI:
FANG Sida, LIU Min, REN Yongjian. Drought and Waterlogging Characteristics and Risk Prediction in Different River Basin Areas of Middle Route of South-to-North Water Transfer Project[J]. Bulletin of Soiland Water Conservation, 2018, 38(6): 263-267. DOI: 10.13961/j.cnki.stbctb.2018.06.040.
Drought and Waterlogging Characteristics and Risk Prediction in Different River Basin Areas of Middle Route of South-to-North Water Transfer Project
[Objective] The drought and waterlogging characteristics in the water source & receiving areas of the middle route of the south-to-north water transfer project were studied
and the risk of "both drought " caused by climate change was analyzed and predicted in order to provide a basis for scientific decision-making.[Methods] Based on daily precipitation data of 265 meteorological stations during 1961-2015 and drought & waterlogging data of past 500 years in the middle route of the south-to-north water transfer project region
the drought and waterlogging characteristics in one water source area(the upper reaches of Hanjiang River) and three water receiving areas(Tangbai
Huaihe
and Haihe river basins) were analyzed
and the efficiency of water transfer in three water receiving areas were calculated. This study also investigated the future drought and waterlogging characteristics under the RCP 4.5 scenario based on the simulation results of 21 CMIP 5 global climate models.[Results] ① In the past 500 years
the probability of occurrence of drought decreased first and then increased in the water source area
In the 20th century
the probability of occurrence of drought in the water source area reached highest in the history(31.7%). ② The Huaihe River basin showed the highest efficiency of water transfer(87.3%) while the Tangbai River basin showed the lowest(78.4%). ③ Since the beginning of the 20th century
the unfavorable probability at each river basin and the water source region reached a maximum. The probability of simultaneously occurrence of multi-year droughts in the water source area and Tangbai & Hai river basins is greater than Huai River basins. ④ The water transfer efficiency during the autumn flood season(SON) is the highest
and that in all the 3 basins during the non-flood season is over 80%. ⑤ The efficiency of water transfer in each water receiving area in the future is above 87%.[Conclusion] The synchronous encounter probability of drought in water source & receiving areas in 20th century reaches a maximum in the past 500 years. The simulations show that it will benefit the water transfer of the project in the future. However
in late 21th century
the risk of waterlogging in both the water source and water receiving areas simultaneously will increase.
Wu Jie, Xu Ying, Gao Xuejie. Projected changes in mean and extreme climates over Hindu Kush Himalayan region by 21 CMIP 5 models[J]. Advances in Climate Change Research, 2017,8(3):176-184.