Application of Tracer Test in Hydrogeological Survey of Yibasan Reservoir

LUO Rui-heng; LIU Tian-yun; HU Shun-qiang; ZHAO Yong-bin; PAN Xiao-dong; PENG Cong

doi:10.11988/ckyyb.20220321

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Journal of Changjiang River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (6) : 43-48. DOI: 10.11988/ckyyb.20220321

Water Resources

Application of Tracer Test in Hydrogeological Survey of Yibasan Reservoir

LUO Rui-heng¹, LIU Tian-yun¹, HU Shun-qiang¹, ZHAO Yong-bin¹, PAN Xiao-dong^2,3, PENG Cong^2,3

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Abstract

The Yibasan Reservoir, located in Maguan County, Wenshan City, is a natural seasonal reservoir consisting of 11 karst depression reservoirs. Transforming these reservoirs into functional water storage facilities not only enhances the local ecological environment but also addresses the water supply challenges faced by the local community.The study area exhibits significant karst development, with an intricate network of underground river channels connecting the karst depressions. To investigate the patterns and distribution of underground river channels within the reservoir area, tracer tests were conducted with sodium fluorescein and rhodamine as tracers. The hydrogeological parameters and underground river network scale were estimated with Qtracer2. The results reveal abundant water storage in the major underground channel YBS01 -YBS05 and the southern branch YBS03-YBS05, reaching 79 060 m³and 72 546 m³, respectively. YBS01 and YBS02 in the northern part of the Damagu Reservoir are hydraulically connected. On the other hand, the southern branch is obstructed by the northeast-oriented compression torsion fault F3, leading to no hydraulic connection with the main channel. These findings provide crucial support for the reservoir formation process, and also offer fundamental data for calculating the capacity of the Yibasan Reservoir.

Key words

tracer test / karst hydrogeology / tracer / Qtracer2 / Yibasan reservoir

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LUO Rui-heng, LIU Tian-yun, HU Shun-qiang, ZHAO Yong-bin, PAN Xiao-dong, PENG Cong. Application of Tracer Test in Hydrogeological Survey of Yibasan Reservoir[J]. Journal of Changjiang River Scientific Research Institute. 2023, 40(6): 43-48 https://doi.org/10.11988/ckyyb.20220321

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