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  • 學位論文

氣候變遷對蘭陽溪流域影響評估

Climate Change Impact Assessment on the Catchment of Lanyang River

指導教授 : 陳彥璋
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摘要


由於氣候變遷下使全球水文循環系統遭到改變,台灣因地理位置關係,洪水量增加、暴潮及海岸侵蝕等致災因子日益嚴重,上游集水區河川短促、陡坡急流及地質不佳,容易造成崩塌、土石流等土砂災害,本研究將針對蘭陽溪上游集水區,探討未來氣候變遷下之流量與泥砂量的變化量。 根據「水利建設因應氣候變遷白皮書」選用日本大氣環流模式MRI-CGCM2_3_2,由台灣大學提供氣候變遷相關水文資料並結合SRES氣候變遷預設情境為A1B、A2和B1情境的短、中、長期之日雨量和日溫度,將水文資料帶入SWAT水文模式中模擬情境日流量與日泥砂量,並對日流量進行頻率分析,經過K-S適合度檢定後,依各情境之最佳解推估未來洪水頻率曲線。 結果顯示,因受到氣候變遷的影響,未來各情境下流量與泥砂量有增加的趨勢,並比較基期與氣候變遷之泥砂迴歸線趨勢及判別A1B情境豐水期之泥砂型態。最後結合一維水理模式HEC-RAS的水位推算,帶入氣候變遷下各情境之洪水頻率,推估在未來情境的牛鬥橋水位變化趨勢。

並列摘要


The climate change result in global hydrological cycle systems changing. Due to Taiwan's location, it has caused the flood, storm surges and coastal erosion. However the upstream catchment area of the river was steep rapids and geological poor, that has easily caused the collapse, landslides and other sediment disasters. This study was focused on the Lanyang River upstream catchment area to discuss the future of climate change under the flow and sediment volume changes. According to the “White Book on water Infrastructure Strategies to Climate Change”, they select MRI-CGCM2_3_2 (Japan) atmospheric general circulation model. To combine hydrological data provided by National Taiwan University and the SRES climate change default scenario. The three modes A1B, A2 and B1 scenarios of short, medium and long-term the daily rainfall and daily temperature data in the SWAT hydrological model to simulate the situatio. Using hydrological data into SWAT model to simulate the daily flow and sediment amount, then analys the daily flow frequency. Through the K-S curve test, we according to various scenarios of the optimal solution is to estimate the flood frequency curve. Due to the climate change, the results show that flow and sediment volume future scenarios tended to increase in the future. Then estimate the sediment regression and compared with the climate change trend and distinguish the sediment type of the A1B scenario wet period. Finally, to combine one-dimensional hydrodynamic model HEC-RAS water level projections, consider the all of the flood frequency with climate change scenarios, then estimate the water level trend in the future scenarios.

參考文獻


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被引用紀錄


陳珮琦(2017)。氣候變遷與土地利用變遷對水文服務的影響-以大屯溪流域為例〔碩士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU201603527
林子平(2015)。土地與氣候變遷情境對流量之影響 -以大屯溪流域為例〔碩士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2015.11032

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