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Abstract During the design stage of Chaozhou water supply pivot project，the immersion problem is analyzed and the waterhead distribution is predicted. Groundwater monitoring network has been laid out to monitor the groundwater in the area that may be affected by immersion. Based on the previous numerical analysis results，combined with a more than two-year groundwater monitoring data and field investigation，the immersion is carefully analyzed and evaluated. The result shows that the primary design goal has been basically realized. According to impoundment and surge shaft influence degree of the groundwater monitoring points，the city zone is classified into three typical areas and Chaozhou main city zone is in the area affected both by impoundment and surge shaft. The immersion affected area is within 600–1 000 m behind the dike and the surge shaft works comparatively well.
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Received: 01 July 2009
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