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首页> 外文期刊>Limnology >Simulation of water colors in a shallow acidified lake, Lake Onneto, Japan, using colorimetric analysis and bio-optical modeling
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Simulation of water colors in a shallow acidified lake, Lake Onneto, Japan, using colorimetric analysis and bio-optical modeling

机译：使用比色分析和生物光学模型模拟浅水酸化湖（日本的Onneto）中的水彩

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摘要

Lake Onneto has unusually brilliant water colors, such as blue-green, green, and greenish yellow. We investigated the coloration mechanism in this lake by measuring the radiometric water color and inherent optical properties (IOPs), such as attenuation, absorption, and scattering coefficients of color-producing agents (CPAs) in the lake. The hue of the water body was determined using colorimetric analysis. In addition, the radiometric water color of the lake was simulated using bio-optical modeling. Results showed that the hues of the water body were different between two sampling stations (blue-green and green at 3.1 and 5.5 m of bottom depth, respectively). However, the total suspended solids (TSS) concentrations were almost identical between the two stations (0.47 and 0.42 mg l?1, respectively). In addition, the attenuation and absorption coefficients showed that the CPAs in the water body were only inorganic suspended solids (ISS) more than 0.7 μm in diameter, and specific CPAs, such as dissolved mineral ions and aqueous colloids, were not observed in the lake. Simulation of the radiometric water color showed that the radiation around 600 nm of wavelength (yellow region) steeply increased with decreasing bottom depth, indicating that the water colors of Lake Onneto are strongly governed by the light reflection from yellowish bottom sediments.
机译：昂内托湖（Lake Onneto）具有异常鲜艳的水彩，例如蓝绿色，绿色和淡黄色。我们通过测量辐射水的颜色和固有光学特性（IOP），例如湖泊中颜色生成剂（CPA）的衰减，吸收和散射系数，研究了该湖中的着色机理。使用比色分析确定水体的色调。另外，使用生物光学模型模拟了湖的辐射水颜色。结果表明，两个采样站之间水体的色调有所不同（蓝绿色和底深度分别为3.1 m和5.5 m的绿色）。但是，两个站之间的总悬浮固体（TSS）浓度几乎相同（分别为0.47和0.42 mg l？1 ）。此外，衰减系数和吸收系数表明，水体中的CPA只是直径大于0.7μm的无机悬浮固体（ISS），在湖中未观察到特定的CPA，例如溶解的矿物质离子和水性胶体。 。辐射水色的模拟表明，随着底部深度的减小，波长（黄色区域）约600 nm处的辐射随着底部深度的减小而急剧增加，这表明Onneto湖的水色强烈地受到来自浅黄色底部沉积物的光反射的控制。

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