由於自然天候及人為不當開發集水區因素，地表逕流常挾帶大量泥砂流入水庫庫區，使得庫區水體含砂濃度及原水濁度飆升，造成民生供水出現問題。本研究是利用水色遙測分析技術，針對南台灣主要飲用水水體曾文水庫及高屏溪攔河堰，以高光譜分析儀USB2000量測現地水面遙測反射光譜 ，並分析含砂濃度，發展出水體含砂濃度之光學定量關係式，以期建立快速量測水體含砂濃度的方法。
針對曾文水庫及高屏溪攔河堰遙的光譜特性，發展出遙測泥砂參數，其目的在於凸顯現地泥砂特徵以及去除藻類葉綠素a和有色溶解物質(CDOM)對光譜反射率的干擾。在環境特性分析結果，曾文水庫屬於低含砂水體區域，高屏溪攔河堰遙則屬於較高含砂水體區域。最後由含砂水體光譜反射率及濃度資料庫，針對曾文水庫及高屏溪攔河堰遙測泥砂參數條件所回歸出的半經驗關係式分別為線性及指數型關係式，其相關系數R2分別為0.83及0.82，透過模式推導及運算，對水體的含砂濃度及濁度都有理想的應用性。

Due to the natural disasters, a considerable change has been observed in the water catchments area of many rivers upstream in Taiwan during the past few years. The suspended sediment concentration (SSC) in rivers plays a crucial role for the management of environment. The purpose of this research applied the spectroradiometer to investigate the relationship between surface remote-sensing reflectance and SSC in Tseng-Wen Reservoir and Kao-Ping-Hsi Weir of south Taiwan. The relationships between water suspended sediment concentrations and spectral reflectance derive a semi-empirical model that develops the rapid method of measuring suspended sediment concentrations.
In order to reduce the influence of chlorophyll-a (Chl-a) and colored dissolved organic matter (CDOM); and characterize spectrum of suspended sediment, the spectral coefficient of suspended sediment will be determined. The result shows that Tseng-Wen Reservoir is a water body of low suspended sediment concentrations; and Kao-Ping-Hsi Weir is a water body of high suspended sediment concentrations.
According to the regressive relationships between concentrations and spectrcal coefficient of suspended sediment, Tseng-Wen Reservoir is a linear regression model and Kao-Ping-Hsi Weir is an exponential model .The coefficient of determination R2 values are all 0.83 and 0.82. It is useful to estimate the concentration of suspended sediment and turbidity in surface water by applying this model.

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