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Structure identification of a karst groundwater system based on high-resolution rainfall-hydrological response
Zongxing Wang1, Rui Wu1, Kun Huang1
1School of Environmental Studies, China University of Geosciences, Wuhan, 430074, Hubei, People's Republic of China.
Environmental Science and Pollution Research International
|December 3, 2021
Summary
Karst groundwater systems respond to rainfall, with intensity affecting flow lag time. Fissures and pores dominate the water-bearing medium, with karst development increasing at greater depths.
Area of Science:
- Hydrogeology
- Karst Hydrology
- Environmental Science
Background:
- Karst groundwater systems are complex and crucial for water resources.
- Understanding rainfall-hydrological responses is vital for water management and disaster prevention.
- The Zhangsanxi karst groundwater system in China presents unique challenges and opportunities for study.
Purpose of the Study:
- To develop a method for identifying aquifer media and structural characteristics in karst systems.
- To analyze the rainfall-hydrological response of the Zhangsanxi karst groundwater system.
- To assess karst development and its implications for water resource utilization and disaster prevention.
Main Methods:
- High-resolution monitoring of rainfall, underground river flow, and groundwater levels.
- Application of an exponential attenuation curve to analyze discharge and level dynamics.
- Determination of karst development degree at varying depths.
Main Results:
- Flow response lag time correlates with rainfall amount and intensity; higher intensity shortens lag time.
- Four rainfall types were identified, with varying underground river flow responses (lag times of 110, 60, and 40 hours for types II, III, and IV).
- The water-bearing medium is primarily karst fissures and pores (2/3), with conduits and caves (1/3); karst development increases with burial depth.
Conclusions:
- Rainfall characteristics significantly influence karst groundwater dynamics.
- Karst system structure and development vary with depth, impacting water flow and storage.
- The findings provide a reference for karst water disaster prevention and resource management in the region.
Keywords:
High-resolution monitoringKarst groundwater systemRainfall-hydrological responseStructure identification of karst groundwater systemZhangjiajie CityMore Related Videos
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