A Comprehensive Investigation on Abnormal Impoundment of Reservoirs—A Case Study of Qionglin Reservoir in Kinmen Island

Abstract

Leakage is the most serious problem in reservoir operation, because heavy leakage influences reservoir impoundment efficiency and even leads to a complete loss of reservoir functions. Since its completion in 1982, Qionglin Reservoir has never been fully filled with water except in the spring of 1983 when there was heavy rain. The reservoir management unit suspected that its side slopes, bottom or dam might leak and carried out a number of leakage prevention and improvement works, but all of them failed to fulfill the impoundment function of the reservoir. Hence, this study attempts to find out the reasons why the reservoir cannot impound water. A series of tests and investigations are carried out in this study, including electrical resistivity tomography of dam, tracer test, geological drilling test, reservoir water level observation, investigation of reservoir catchment area and field investigation of dam. The test results and investigation results show that no leakage path and leakage are found. According to the analysis, there is no serious leakage of this reservoir. The main reason for the failure of impoundment is that massive improper development in the catchment area influences the runoff into the reservoir.

Impounding Reservoirs, Benefits and Risks: A Review of Environmental and Technical Aspects of Construction and Operation

“…C2.1-Water resources management [44][45][46][47][48][49][50][51][52] The analyses concern 4 very large, 12 large and 2 small reservoirs in Asia and 26 large or small reservoirs in Europe. In addition, publication [48] reviews based on a large dataset.…”

“…The publications analysed highlighted the crucial importance of reservoirs in increasing water resources, while pointing out the need for a complex approach to their management [44][45][46][47][48][49][50][51][52]. To ensure a stable and uninterrupted water supply, it is assumed that improved reservoir-operation criteria [44] or predictive models using widely available hydrometeorological data can be introduced.…”

“…In both the planning and operation stages of a reservoir, consideration must be given to whether expanding the farming economy and the creation of public housing will negatively impact the retention capacity of the facility (pollution, siltation, etc.) [47,49]. Although arid and desert regions primarily experience water supply problems, they require alternative approaches to regulatory development, through, for example, the creation of underground reservoirs to reduce evaporation losses [50].…”

Variable analysis for supporting reservoir impounding modeling

“…The experience of impounding at a small reservoir (309,000 m3) in Qionglin reservoir on Kinmen Island, Taiwan that is written by Hung et.al [3] concluded that rainfall is the factor that influenced the impounding of Qionglin reservoir mainly in the climate which the evaporation is relatively higher than rainfall depth. The research plan is to investigate time and increase in water level elevation during reservoir impounding by studying the affected variable so there is obtained the supporting system model formulation of initial impounding.…”

Development of an Underground Tunnels Detection Algorithm for Electrical Resistivity Tomography Based on Deep Learning

“…The resistivity is highly correlated with the geomaterial and groundwater characteristics, so it has gradually become one of the primary geophysical methods of geotechnical investigation. In the past decade, the ERT has been extensively used in a variety of geotechnical and environmental engineering investigation and monitoring, for instance, in geologic surveys [19,20], fault line surveys [21][22][23][24][25], slipping plane survey and monitoring [26][27][28], groundwater investigation and pollution monitor-ing [29,30], reservoir/dam leakage investigation and monitoring [31,32], refuse landfill leakage investigation and monitoring [33][34][35], and underground tunnel mining [36][37][38].…”