頁籤選單縮合
題 名 | 單水層水井單位洩降出水量之研究=A Study on Specific Capacity of Single-Layer Water Well |
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作 者 | 陳健夫; 方永泰; | 書刊名 | 臺灣糖業公司研究所研究彙報 |
卷 期 | 167 2000.03[民89.03] |
頁 次 | 頁1-18 |
分類號 | 443.67 |
關鍵詞 | 地下水; 水井; 單位洩降出水量; 水井效率; 受壓水層; 非受壓水層; Groundwater; Water well; Specific capacity; Well efficiency; Confined aquifer; Unconfined aquifer; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究利用台糖公司水井多年來之抽水資料報告,分析水井出水特性,獲下列 若干若論:單水層水井為最基本之一種水井形態,其單位洩降出水量直接受水層損失係數B, 水井損失係數C及出水量Q所控制,同時臨井水位之干擾,亦為一重大之影響因子。此外, 對非受壓水層水井言,則水文之消漲,將會改變水層之出水能力。單水層水井單位洩降出水 量之變化,理論上遵循水井水力公式,惟於實際應用時,由於一般水層組織結構,非為等向、 均一之理想狀態,且各影響因子參雜併存,致實測值常與理論值有相當之差異。井體性能之 優劣,可以單位洩降出水量Q/s之大小表示。單位洩降出水量之變化,基本上可分為無傷害 性及傷害性兩類。無傷害因子包括水位變化、抽水時間、出水量、臨井干擾及水層環境變化 等。而傷害性因子主要為井週濾水管淤塞、井底積沙或地層下陷等原因所造成,二者於應用 分析時,需加以區分。井體性能退化者可藉洗井恢復原出水量,惟洗井時機應以抽水之經濟 性,井體之安全性及水層之優劣等加以考量。 |
英文摘要 | According to long-term experimental data on TSC water well characteristics, some conclusions can be drawn as follows: Single-layer water well is of a fundamental type. Its specific capacity is related to aquifer loss, well loss, and well discharge. In addition, interference of vicinity water wells is also an important factor that influences well performance. For wells under unconfined aquifer conditions, the fluctuations of water level is the other key factor that will change well characteristics. Theoretically, the calculation of specific capacity is based on well hydraulics. But the experimental data often deviate from well formula if the geological formation is not in ideal isotropic and homogeneous conditions. Basically, the change of specific capacity in a single-layer water well can be classified into two categories: harmless and harmful. The effecting factors of the former include pumping time, well discharge, interference of vicinity water wells and fluctuations of water level, while those of the latter may be attributed to well screen clogging, sand sediment, and subsidence of formation. The analysis of well performance should be made separately. Once a well lose its original water discharge function, well redevelopment is necessary, but it must be evaluated from some basic elements of well conditions and economy before proper measures are taken. |
本系統中英文摘要資訊取自各篇刊載內容。