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題 名 | Modeling the Inter-Strata Seepage Effect Near the Nanhua Reservoir, Taiwan=地層滲流效應的模擬--以南化水庫區為例 |
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作 者 | 吳銘志; 施凱閔; | 書刊名 | 中國地質學會會刊 |
卷 期 | 42:3 1999.08[民88.08] |
頁 次 | 頁409-428 |
分類號 | 443.96 |
關鍵詞 | 水庫; 地層滲流; 數值模擬; Reservoir; Inter-strata seepage; Numerical modeling; MODFLOW; |
語 文 | 英文(English) |
中文摘要 | 本研究根據地質調查、水文地質調查及現地試驗資料的分析結果,以MODFLOW 地下水流數值模擬程式,模擬南化水庫淹沒區附近之地層中,因應水庫蓄水營運後所將產生 的地層滲流效應。經由滲流模式模擬的結果可知,於研究區域中地下水滲流主要為自東北向 西南方向流動。模擬區域中之地層滲流量,可經由模式模擬之分析結果獲得。另外,亦可得 知相對較高的水力梯度區間,將出現於南化鄉玉山村與茅埔村附近。根據模擬之敏感度分析 結果,可得知模式受後崛溪水位變化時,其與所產生之地層滲流量之變化的關係,以及模式 受地層貯水性質影響時,其與滲流作用達穩定流狀態所需時間之變化的關係。經由對各地層 滲透性質之模擬結果得知,位於研究區域內之竹頭崎層的滲透地質,在地層滲流作用初期, 將會對研究區域內之地下水位分佈形態與地層滲流量有極大的影響。而茅埔頁岩層的滲透性 質,則在地層滲流作用漸達穩定流狀態時,始對地層滲流量有較大的影響。由本研究過程中 可得知,數值模擬技術可應用於地層滲流效應問題之檢討與預測,更有助進一步瞭解研究區 域之水文地質特性。 |
英文摘要 | A numerical groundwater flow modeling program, MODFLOW, was applied to simulate inter-strata seepage near the flooded region of the Nanhua Reservoir. It was concluded that groundwater seeping within the strata mainly flowed from northeast to southwest. The water loss rates caused by the seepage after the presumed operation of the reservoir were estimated. Relatively high hydraulic gradients, due to the seepage effect, were located near the villages of Yusun and Maopu. The greatest changes in water loss rate were found to correspond to the water level changes in the Hojuey River. The time required for the seepage effect to reach a steady state condition, based on different presumed settings for specific storage, was also estimated. The Chutouchi Formation may affect the seepage flow more within the studied region during the early phase of the simulation. However, during the later phase, the Maopu shale may have more effect. It was concluded that the numerical modeling technique is capable of predicting the effect of inter-strata seepage. It can also help us obtain a further understanding of the hydrogeological characteristics of the region. |
本系統中英文摘要資訊取自各篇刊載內容。