濁水溪流域地下水資源開發與管理

Translated title of the contribution: Groundwater exploitation and management in Jhuoshuei River Watershed

Research output: Contribution to journalArticlepeer-review

Abstract

The recent water exploitative facilities in Changhua and Yunlin Counties include the Hushan Reservoir and Niaozueitan Artificial Lake. Both of them are proposed to reduce the groundwater use in the Jhoushuei River alluvial fan to mitigate the land subsidence problem. However, despite the water supply from both of them, the water resources still cannot fully match the water demand in the Jhoushuei River alluvial fan. Due to the lack of water resources in this region, groundwater is still needed to supply the insufficient part of the water demand. Ming-Chu Basin is located between the Chi-Chi Weir and the mountain pass of Jhoushuei River at the top of alluvial fan. The thickness of recent sediment in the basin is about 30 meters. It is an aquifer with good storage and permeable properties and is an isolated groundwater reservoir as well. The recent sediment area around the river channel is a good place to exploit groundwater and hyporheic water resources. Accompanied with the use of the Chi-Chi Weir, the total quantity of water resources can be obtained by using the conjunctive operation. The strategy of water exploitation in Jhoushuei River alluvial fan should be separated into three steps. In short term, the strategy should focus on stopping the decrease of groundwater level and mitigating the subsidence rate. For the second step, the strategy is to rise the groundwater should be commonly used without inducing land subsidence problem. The groundwater management system should be developed based on controlling the quantity of groundwater right. The quantity of water right should be annual reviewed and considered for a small adjustment in short term (e.g., three years), a large adjustment in mid-term (e.g., five years), and a total adjustment in long term (e.g., ten years). It is after these adjustments that the groundwater resources can be sustainably used in the Jhoushuei River alluvial fan.

Translated title of the contributionGroundwater exploitation and management in Jhuoshuei River Watershed
Original languageChinese (Traditional)
Pages (from-to)43-67
Number of pages25
JournalTaiwan Water Conservancy
Volume67
Issue number1
StatePublished - 2019

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