Groundwater Recession Curve Analysis and Recharge Estimation in Fractured Rock Aquifer

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Project title

Code/計畫編號

MOST106-2119-M019-005

Translated Name/計畫中文名

裂隙岩體含水層地下水退水行為分析與補注量推估研究

Project Coordinator/計畫主持人

Shih-Meng Hsu

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Harbor and River Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=12488739

Year

2017

Start date/計畫起

01-08-2017

Expected Completion/計畫迄

31-07-2018

Bugetid/研究經費

543千元

ResearchField/研究領域

地球科學

"地下水位的觀測資料可以顯示水文循環反應、降雨補注及地下水含水層系統水文地質特性等，因此在進行地下水補注量推估時，需先了解地下水位洩降退水變動的行為表現，及其不同深度變動的情況是否與地層水力特性具連動特性，對建立適當之地下水補注推估模式有很大幫助，尤其研究的目標地質環境為裂隙岩體時更加需要。因為降雨入滲裂隙岩體地下水補注過程中，會受裂隙岩體本身存在許多複雜構造及岩性差異，影響補注時間快慢或是補注量之多寡，因此本研究旨在發展發展降雨入滲至裂隙岩體環境之地下水補注量估算技術，研究重點在進行裂隙岩層組成特性與地下水退水率之間關連性研究，然後建構兩者之間關係式，並結合適當岩體滲透性推估模式建立退水率經驗公式，協助提升地下水補注量計算之速度，且模式同時兼顧反應出地下水系統在山區地質環境內在屬性(intrinsic properties)變化的退水行為。" "Groundwater monitoring data reveal response of hydrological cycle, rainfall-recharge processes, and hydrogeologic characteristics of groundwater aquifers. Prior to quantitatively estimating groundwater recharge, groundwater recession behavior and correlations between recession rates varying with depths and aquifer hydraulic properties must be understood. This is beneficial to developing a more realistic estimation model for groundwater recharge, which is particular important in study areas where recharge occurs in fractured rock media. Since groundwater recharge to fractured rock aquifers dominates by lithology and fracture properties, this may affect the duration and amount of recharge. Thus, this study is to develop groundwater recharge estimation techniques within fractured rock formations. The main point of this research is to conduct correlation studies between fractured rock properties and recession rates. Meanwhile, the above study outcome incorporated into a rock mass permeability index system is capable of developing an empirical model for estimating recession rates which can help speed up groundwater recharge calculation and obtain actual recession behaviors in response to intrinsic properties of fractured rock aquifers."

Keyword(s)

裂隙岩體含水層
岩體滲透性
退水率
地下水補注
fractured rock aquifer
rock permeability
recession rate
groundwater recharge

DSpace CRIS

Groundwater Recession Curve Analysis and Recharge Estimation in Fractured Rock Aquifer

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