Modelling of water withdrawal for pollutant flushing in the tidal river network,Pearl River Delta,China |
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| Authors: | Chun-Ling Liu Qiang Zhang Shu-Lan Zhu Kun Li |
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| Institution: | 1. Pearl River Hydraulic Research Institute , Guangzhou , 510611 , China;2. Department of Water Resources and Environment , Sun Yat-sen University , Guangzhou , 510275 , China;3. Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Sun Yat-sen University , Guangzhou , 510275 , China;4. Guangdong Hydropower Planning and Design Institute , Guangzhou , 510635 , China |
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| Abstract: | Abstract A one-dimensional water quantity and quality mathematical model was developed to evaluate the effects of joint gate–pump operation in terms of water withdrawal for pollutant flushing. The study was carried out in dry seasons in the Foshan River channel, China. The results indicate that the input of freshwater into the upper and middle reaches of the Foshan River can improve the water quality of the lower reaches. However, the backwater effect due to water diversion in the middle reaches of the river can greatly offset the cleaning processes in the upper reaches of the Foshan River. The results indicate that water quality in the upper Foshan River (Jiebian) may degrade with an increase in the rate of water withdrawal from the middle river when the discharge pumped from the upper Foshan River is less than 10m3/s; optimal water quality improvement is obtained with discharge values of 30 and 20 m3/s, respectively, at the upper and middle reaches of the Foshan River. Editor D. Koutsoyiannis Citation Liu, C.-L., Jiang, T., Zhang, Q., Zhu, S. and Li, K., 2012. Modelling of water withdrawal for pollutant flushing in the tidal river network, Pearl River Delta, China. Hydrological Sciences Journal, 57 (3), 576–590. |
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| Keywords: | tidal river network joint gate–pump operation hydrodynamics water quality Pearl River Delta China |
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