頁籤選單縮合
題 名 | 結合空間統計及專家系統建立之水文地質分層=Establishing the Hydrostratigraphic Subdivision by Combination of Geostatistic and HGES |
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作 者 | 詹益璋; 譚義績; 陳主惠; | 書刊名 | 農業工程學報 |
卷 期 | 45:1 1999.03[民88.03] |
頁 次 | 頁55-71 |
分類號 | 351.7 |
關鍵詞 | 水文地質專家系統; 克利金推估; 變異元; HGES; Kriging estimation; Variogram; |
語 文 | 中文(Chinese) |
中文摘要 | 水文地質剖面圖在水文地質結構的分析上,是一項非常重要的工具,主要在於瞭 解地層在垂直面上的變化,及主要含水層分佈等相關資料。一幅良好的水文地質剖面圖需配 合大規模的鑽井,以取得足夠地質資料,包括地電阻與有孔蟲等。傳統上需倚靠水文地質專 家之專業上之判別進行兩項主要的步驟:1、單支岩心柱各細層之延伸合併,以取得符合工程 上應用尺度之沈積層。 2、選擇剖面連線上,各井各層之對比。此兩步驟對於非地質專業人 士均甚困難。水文地質專家系統 (HGES,楊等,1996) 在水文地質分層架構的建立上,提供 了一套簡便的方式,利用電腦程式的輔助,能夠迅速地繪出剖面圖。但專家系統在剖面與剖 面交會處,所推估之值常無法互相吻合;且對含水層的尖端削減也無法提供有效的推估。本 研究共分兩大步驟,其一為採取了彰、雲兩縣共 54 口井資料,利用專家系統合併各沈積層 。 取出沈積層的厚度與深度資料,作為區域化變數。使用美國環保署地質統計模式 GEOEAS ,進行理論變異元 (Variogram) 模式的套配。 同時推估出各井點間,未知點下方之沈積層 厚度與深度,藉此繪製剖面圖,以供與地調所及專家系統所繪製圖表進行比較。本研究的主 要目的, 即在改良水文地質專家系統 (HGES),亦針對於專家系統應用於水文地質架構上, 增加以空間統計分法 (本研究採用克利金推估法 ) 加以細部修正, 期以能夠對水文地質分 層結構提供更精確的描述。結果顯示,經空間統計方法加入後,水文地質剖面圖各井點間, 各沈積層之可能連接方式因加入多個推估點值,呈現較為合理的變化。同時對濁水溪沖積平 原下方三個含水層、兩個阻水層的厚度變化、延伸情形及尖滅處也可提供較精確且合理的推 估。 |
英文摘要 | Analyzing hydrogeological framework to establish the hydrostratigraphic subdivision of geological profiles are so important that researcher can understand the changing of the vertical properties of aquifers and aquitards. An excellent hydrostratigraphic profile needs numbers of well logging, electric resistivity, and formainifers. Traditionally, two important steps are required. 1. Combination of detailing layers of well logging for engineering scale. 2.Comparing and connecting the layers along the profiles. The HydroGeology Expert System (HGES, Yang. Et al, 1996) provides a fast and accurate process in constructing subdivisions, but the HGES is not able to provide accurate intersection between profiles and estimate the aquitard die-away. The purpose of the research is include two major steps, one is to combine the Kriging estimation and the HGES, and attempt to make complete hydrogeological framework of Choushui River fan. There have 54 wells are scattering in CHANG-HWA county and YUN-LIN county region that have been used as this reseach input data. the other is applied GEOEAS, a statistical program from EPA in USA, can be applied to analyze the experimental data with the theoretical variogram. Thickness and depth getting from HGES were used as the regionalized variables in this research. The result showed that this method can be used to provide complete regional hydrogeological properties and reasonable estimatin of the aquitard die-away. |
本系統中英文摘要資訊取自各篇刊載內容。