近年來全球氣候變遷的狀況不但快速而且劇烈，嚴重考驗台灣水資源的調度，也凸顯台灣水資源發展的窘迫，而用水所衍生的問題也不再僅是「量」的問題，更是「質」的問題。目前尚未掌握含砂水體完整光學性質，致使無法藉由遙測方法快速的估算大範圍水體之含砂量變化，如要進行後續應用，勢必進行實驗以掌握必要的資訊，本研究的動機是要先行釐清部分含砂水體的光學性質，以加速後續實驗室實驗規劃與實做的進度，因此，本研究設定了下列事項做為本研究的研究目的：

1.探討不同環境因素下，含砂水體「含砂濃度」、「反射率」與「光譜波長」三者間的關係。
2.探討不同材料因素下，含砂水體「含砂濃度」、「反射率」與「光譜波長」三者間的關係。
3.由模擬成果歸納適合進行含砂水體實驗研究的特定光譜波長或縮小所需要進行實驗的光譜波長區間。

經過一連串文獻回顧、模擬設計、模擬實做、資料整理與資料分析之後，由本研究的成果進行歸納之後，可得以下結論：

1.藉由數值模擬探索含砂水體光學特性是可行的。
2.含砂水體當濃度發生變化時，反射率峰值所對應波長會有偏移現象。
3.波長與懸浮泥砂濃度呈現對數-線性關係。
4.利用反射率估算濃度是可以信賴的方法。
5.環境因素變動，對反射率或波長與懸浮泥砂濃度的關係影響不大。
6.懸浮泥砂種類的變動，對反射率或波長與懸浮泥砂濃度的關係影響很大。
7.濃度在400mg/L以下，第一峰值對應的波長變化不穩定。
8.研究泥砂光學特性時，可將波長區間鎖定在600nm~700nm之間。

在研究的過程中，由於受到現實條件的限制，僅能就已有基本資料的材料進行模擬，也為了凸顯不同設定下的差異，因而做了必要的簡化，所以離真正要運用到複雜的真實狀況仍有許多值得努力的地方，但畢竟有了開始，希望藉此做一個起點，讓不論是對本研究有興趣或是能繼續深入研究的人，能有獲得一些可以參考的資訊。

The globe weather changes quickly and extremely. There is a bad situation of dispatch water resource. The problems of water application were not only quantity but also quantity. We do not have enough information of optic properties of water for evaluating the change of solids concentration in wide area by remote sensing. With the purpose to accelerate the process of getting information of optic property of water, we have to make some concept clearly. This study will help. The studies setup the follow items as the goal:

1.Explode the relationship between concentration, reflectance, and wavelength under various conditions of environment factors.
2.Explode the relationship between concentration, reflectance, and wavelength under various conditions of material factors.
3.Explode the very wavelength or the range of wavelength which is the best suitable for laboratory experimentation.

After a series of processes such as paper review, case design, numerical simulation, data processes and data analysis, finally we got the conclusions:

1.It is practicable to find out the optic properties by numerical simulation.
2.The wavelength relates to the reflectance peak will shifting when the concentration changes.
3.The wavelength and the concentration go with a log-linear relationship.
4.It is reliable for evaluating the concentration by the reflectance.
5.The changes of environment factors have less effect for the relationship between concentration, reflectance, and wavelength.
6.The changes of material factors have great effect for the relationship between concentration, reflectance, and wavelength.
7.The changes of wavelength become unstable when the concentration under 400mg/L.
8.We may get information of optic properties with the wavelength within 600nm-700nm.

Anyway, I hope someone have interest of the study will find information helpful.

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