COMPREHENSIVE EVALUATION OF GROUNDWATER RESOURCES IN TYPICAL GRANITE ISLANDS IN SOUTH CHINA

LAI Jianhua; TANG Changyuan; CAO Yingjie; LIU Guangli; ZHONG Chicheng

doi:10.13205/j.hjgc.202202010

Volume 40 Issue 2

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LAI Jianhua, TANG Changyuan, CAO Yingjie, LIU Guangli, ZHONG Chicheng. COMPREHENSIVE EVALUATION OF GROUNDWATER RESOURCES IN TYPICAL GRANITE ISLANDS IN SOUTH CHINA[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 59-65,198. doi: 10.13205/j.hjgc.202202010

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LAI Jianhua, TANG Changyuan, CAO Yingjie, LIU Guangli, ZHONG Chicheng. COMPREHENSIVE EVALUATION OF GROUNDWATER RESOURCES IN TYPICAL GRANITE ISLANDS IN SOUTH CHINA[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 59-65,198. doi: 10.13205/j.hjgc.202202010

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COMPREHENSIVE EVALUATION OF GROUNDWATER RESOURCES IN TYPICAL GRANITE ISLANDS IN SOUTH CHINA

doi: 10.13205/j.hjgc.202202010

1. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510006, China;
2. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China

Received Date: 2021-04-12
Available Online: 2022-04-02
Publish Date: 2022-04-02

Abstract

Abstract

The contradiction between the supply and demand of water resources of the islands has become increasingly prominent. This study comprehensively used geophysical prospecting, hydrogeological drilling and isotopes tracing analysis to evaluate the storability and reproducibility of groundwater resources in the Tuichuanwan reservoir area of Wanshan Island, Zhuhai, in Guangdong Province. The hydrogeological structure of the Tuichuanwan reservoir area were revealed by the methods of high-density resistivity and the hydrogeological drillings, and we found that the loose sediment aquifer was spatially discontinuous, which together with the fractured aquifer, constituted the main groundwater aquifer in the area. And the bedrock layer constituted the water-proof floor. The permeability coefficient of the loose sedimentary aquifer was 8.30×10^-3 cm/s and the specific yield was 0.32; the permeability coefficient of the fractured aquifer was 2.52×10^-5 cm/s and the specific yield was 0.10. The groundwater storage capacity of the aquifer was approximately 14,873 m³, indicating a large water storage space. Precipitation was found to be the main source of groundwater using isotopes tracing. The recharge was determined to be 145,065 m³/a through runoff segmentation, and the renewal cycle of groundwater was about 37 d, indicating that the groundwater in the reservoir was reproducible and had an excellent recharge condition. This paper could provide technical ideas and references for exploration and management of groundwater resources in granite islands.
- high-density electrical method,
- hydrogeological drilling,
- granite islands,
- hydrogen and oxygen stable isotopes,
- Dawanshan Island

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References(43)

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