科研之友
微信
新浪微博
Facebook
分享链接
摘要
Lake color is the core beauty of karst landscapes in the Huanglong Nature Reserve of China. In the present study, we investigated karst lakes in the Huanglong Nature Reserve and plateau non-karst lakes (Cuoqionghai Lake and Xiarucuo Lake). The water color and water environment factors were compared and analyzed using hyperspectral equipment to measure normalized water-leaving radiance. The results were as follows: (1) The water color of the karst lakes in the Huanglong Nature Reserve was blue-green, and the reflection wavelength of the normalized water-leaving radiance was 420-570 nm. (2) The water chemical types of karst lakes in the Huanglong Nature Reserve were Ca2+-HCO3- and Mg2+-HCO3-, and the water had unique environment characteristics, such as high transparency, oligotrophicity, and strong wavelength selectivity in the absorption, reflection, and scattering of visible light, but the spectral curve of non-karst lakes was not as obvious as that of Huanglong karst lakes. (3) Based on the analysis of the cause of water color in Huanglong karst lakes, the lakes were found to be rich in Ca2+, Mg2+, and HCO3-, and travertine deposition was the core process of karst lake water color formation. In redundancy and correlation analyses, different water environment factors and water color tristimulus values (R, G, B) indicated a significant negative correlation (P < 0.05) and positive correlation (P < 0.05), respectively. The water quality parameters associated with travertine deposition were significantly affected by the water color (P < 0.05). This study indicated that the process and water environmental factors were necessary to maintain and protect the water color of the Huanglong Nature Reserve.
- 单位
